1Code timeout=setTimeout("updateTimeStamp();",5000); 1 10 Which
one of the following is true of the code segment above? It causes
setTimeout() to initialize the date and time library. It fires an
event to invoke updateTimeStamp() every five seconds. It creates a
Time object that ticks once every 0.5 seconds. It fires an event to
invoke updateTimeStamp() in five seconds. It adds an onTimeOut
event handler to the document.
Ans:
It fires an event to invoke updateTimeStamp() in five
seconds.
Code
setTimeout("cycle()",3 * 3000); How often is function cycle()
called in the above code? 3 milliseconds 3.003 seconds 3000
milliseconds 9 seconds 9000 seconds Ans: 9 seconds
Date: 4/26/2009 Time: 10:13:9
currentDate = new Date() with (currentDate) {
document.write("Date: "+getMonth() +
"/"+getDate()+"/"+getYear()+"
") document.write("Time: "+getHours() +
":"+getMinutes()+":"+getSeconds()) } What is the output of the code
above in the user's browser? (Assume user time is Thursday July 9,
2003, and the current time is 3:30:33 P.M. EST) Date: July/9/2003
Time: 3:30:33 Date: July/9/03 Time: 15:30:33 Date: 6/9/2003 Time:
15:30:33 Date: 7/9th/2003 Time: 3:30:33 Date: July/9th/2003 Time:
15:30:33
2 ANS:Date: 6/9/2003 Time: 15:30:33
Which one of the following is true of the "Math" object? It must
be instantiated with Math(base) before any methods are used. It
provides methods and properties for various arithmetic operations.
It holds the base (10, 16, e, etc.) used in mathematical
operations. It holds string properties containing all arithmetic
symbols. It performs common vector-based drawing functions. ANS: It
provides methods and properties for various arithmetic operations.
What code asks if the user wants a greeting and, if so, displays
"wel.gif" and writes "Welcome!" in the document window? if
(confirmed("OK to welcome?")) { alert.write(); alert.write(
Welcome!); } if (confirmed("OK to welcome?")) { alert('');
alert("
Welcome!"); } if (confirm("OK to welcome?")) { document.write('');
document.write("
Welcome!"); } if (confirm("OK to welcome?")) { document.write();
document.write(
Welcome!); } if (confirm("OK to welcome?")) { document.write();
alert(
Welcome!); } Ans : Option 3 if (confirm("OK to welcome?")) {
document.write(''); document.write("
Welcome!"); }
Sample Code
document.TestForm.TestSelect.options[1].selected = true; What
does the above code do? It selects the first option in the TestForm
on the TestSelect. It deselects the first option in the TestSelect
on the TestForm. It deselects the second option in the TestSelect
on the TestForm. It selects the second option in the TestSelect on
the TestForm. It selects the first option in the TestSelect on the
TestForm. Ans: It selects the second option in the TestSelect on
the TestForm.
3
How do you change the document in the second frame to
"test.html"? top.frames[2].url = "test.html"; self.frames[1].url =
"test.html"; self.frames[2].location.href = "test.html";
self.frames[1].href = "test.html"; self.frames[1].location.href =
"test.html";
ANS:
self.frames[1].location.href = "test.html";
The event method "setTimeout(code, time)" is a method belonging
to which one of the following objects? document location window
form It does not belong to any object.
ANS:
window
Which one of the following statements is true? Global variables
must be used first in order to let the browser know to initialize
it. Global variables must be declared in an outside file. Global
variables are properties of a global object. Global variables are
always constants. Global variables are inaccessible from more than
one window. ANS: Global variables are properties of a global
object.
Which one of the following methods may need privileges?
escape(s) document.clear() form.submit()
4navigator.javaEnabled() self.close()
ANS:
navigator.javaEnabled()
if (navigator.javaEnabled()) { function1() } else function2()
.... a preference with the preference method requires the
UniversalPreferencesRead privilege. ...
Sample Code
What does x contain if the user presses "OK" on the confirm
dialog above? 'OK' true 1 A reference to the confirm dialog 'Is it
OK?'
ANS: true
What does window.length return? The length in pixels The number
of open windows The length as a percentage of screen size The
number of open browser windows The number of frames in the
window
ANS:
The number of frames in the window
Sample Code
var i = 0, j = 0; for ( ; i < 10; i++) j += ++i; After the
above code segment is run, what will be the values of 'i' and
'j'?
5i = 12, j = 36 i = 11, j = 36 i = 10, j = 36 i = 11, j = 25 i =
10, j = 25
ANS:
i = 10, j = 25
If a window contains only two sibling frames, which one of the
following is equivalent to "parent" within one of those frames?
document frames top window self
ANS:
top
Code
var total=0; for(var j=0;j 1) * (z
11 Referring to the above, which code fragment loads i with the
value of the second array element? i = o.array(2); i =
o.prototype.array[2]; i = o.array["1"]; i = o.prototype.array[1]; i
= o.array(1);
ANS:
i = o.array["1"];
What code removes every 'x' from String "S"? var myArray =
S.clear('x'); S = myArray.join(''); var SCopy = ''; for(var i = 0;
i < S.length; i++) if(S.charAt(i)!='x') {SCopy += S.charAt(i); S
= SCopy; while(i=1;i Referring to the above, what happens when the
"On" checkbox is checked for the first time? The "Off" checkbox is
checked. The "On" checkbox is unchecked. The "Off" checkbox is
reversed. The "Off" checkbox is unchecked. Nothing happens.
ANS: Nothing happens.
22Sample Code Where do the results from submitting the above
form go? To a new window To a target named 'frame2' To the topmost
window To a target named 'frame1' To the same frame in which the
form is
ANS:
To a target named 'frame2'
To a target named 'frame1'
Code
var s = "test"; s.big(); s.blink(); s=s.bold(); s=s.strike();
s=s.fontsize(7); document.write(s.italics()); Referring to the
above code, the html document shows the word "test" with what style
characteristics? Blinking, bold, strikethrough, size 8, and italic
Default styles for browser Bold, strikethrough, size 7, and italic
Size 7 and italic Italic
ANS:
Bold, strikethrough, size 7, and italic
Code
var i=0; for(j=0;j Referring to the sample code above, which one
of the following functions assigns another value to the hidden
input? function changeValue(f){ var j = prompt("New Value", "");
f.hiddenInput = j; } function changeValue(f){ var j = prompt("New
Value", ""); f[hiddenInput].value = j; } function changeValue(f){
f[hiddenInput] = prompt("New Value", ""); } function
changeValue(f){ f.hiddenInput.value = prompt("New Value", ""); }
function changeValue(f){ var j = prompt("New Value", "");
f.forms.hiddenInput.value = j; }
ANS: function changeValue(f){ f.hiddenInput.value = prompt("New
Value", ""); }
Q:Which
one of the following is true of an event?
It is the execution of any function. It is a signal generated
when a specific action occurs. It is the start of any script block
execution. It is a user-generated action. It is the execution of
any script statement.
ANS:It is a signal generated when a specific action occurs.
Sample Code
var x = 0; var y = 3; Referring to the above code, which one of
the following is true? x == y - 3 x=y y0
39y * -3 > 0 ANS: x == y - 3
Sample Code
Option 1 Option 2 Option 3 Option 4
Q:
function surfto(form) { var idx=form.s1.selectedIndex
if(form.s1.options[idx].value != 0)
location=form.s1.options[idx].value; } Choose One U2 U3 U4
Pull down with 4 choices
Which property is used to access the number of elements in a
form? elements method length count
40number ANS: length
Sample Code
var testVar = Math.ceil(Math.random() * 100); Referring to the
above, what is range of variable "testVar"? -99 to 100 0 to 99 0 to
100 1 to 99 1 to 100 ANS: 1 to 100
41
Generally speaking, the "onUnload" event handler is used to do
which one of the following? Choice 1 Choice 2 Choice 3 Choice 4
Choice 5 Remove a document from browser cache Unload an HTML
document Perform actions after a document is unloaded Perform
actions before a document is unloaded Close a window or frame
objects
(I think itz answer is option 5 please verify- Pooja) Perform
actions before a document is unloaded
42Home Order Resellers Contact us You are here: Duckware Java
Applets Reference Web tips About Shareware JavaTM Applet Reference
PMVR 1. The Java HTML Tag SlideShow 2. Applet Security Model
GoRound 3. Technical Notes Java Tools JexePack Jobfuscate 1.
MakeInstall The Java HTML Tag Affordware Bug Free C param
name=parameter2 value=value2> Space Rocks . . .
alternateHTML
Contact us
To embed any Java applet within an HTML web page, you must use
the tag. See the table to the right for the tag syntax (grayed
options are optional; bold text is used as-is; italic text is
information that you must provide). code=class-filename
-code="pmvr.class" -- The filename of the applet to load (which
always ends in .class). It will load from the directory/folder
listed by the codebase attribute listed below. width=pixels --
width=500 -- The width, in pixels, of the applet. This may also be
a percentage, like 20%, but rarely is. height=pixels -- height=250
-- The height, in pixels, of the applet. This may also be a
percentage, like 20%, but rarely is.
archive=jar-file -- archive="pmvr.jar" -- The name of a jar
file, which contains the *.class files for you applet. Note that
files in the JA must be in stored format (no compression).
Otherwise, if you use compression, you limit yourself to Java 1.1
or later compatibility.
instance-name -- name="pmvr" -- Your name for the applet, which
can be any text that makes sense to you. This allows applets within
web page to find each other and it allows for you to control the
applets via JavaScript. This attribute is optional.
codebase=url -- codebase=".." -- The URL to the directory/folder
containing the applet code (class files). An absolute URL can be
specified (useful for hosting PMVR tours on multiple domains). A
relative URL allows the applet to work on both web servers and the
local file system. relative URL is relative to the document's base
URL defined by the BASE tag. If the document does not define a BASE
tag, it is relative to the directory/folder containing the HTML
file.
align=alignment -- align="left" -- The alignment of the applet.
It behaves (and has the same options) as the IMG tag align
attribute. Th attribute is optional.
vspace=pixels -- vspace=3 -- The vertical space, in pixels,
between the applet and surrounding text. It behaves the same as the
IMG tag vs attribute. This attribute is optional.
hspace=pixels -- hspace=3 -- the horizontal space, in pixels,
between the applet and surrounding text. It behaves the same as the
IMG tag hspace attribute. This attribute is optional.
MAYSCRIPT -- This attribute allows you to use JavaScript within
an applet. If you want to use JavaScript, you must grant the applet
access to JavaScript by using the MAYSCRIPT attribute, otherwise
the applet is not permitted to use JavaScript. If you use MAYSCRIPT
on one applet in web page, you will need to use MAYSCRIPT on all
applets in the web page. Please refer to the 12/30/1999 tech note
[3] for details.
43
-- Applet parameters are used to configure an applet. Just use
as many param tags as needed to configure the parameters (the
parameters are always specific to the particular applet you are
using). Please note that param tags are defined within the APPLET
tag.
AlternateHTML -- If the tag is not supported by a web browser,
the HTML in this section will be displayed. Otherwise, the applet
is shown and the HTML in this section is ignored. For more
information about the tag, visit Sun's Applet tag reference.
2. The Java Applet Security Model A Java VM (virtual machine) is
what allows Java applets to run within web browsers. And all modern
web browsers come with a Java VM. Jav applets are safe to run on
your computer because the Java VM prevents a Java applet from
accessing resources (files/network/memory/etc) is not authorized to
access. Applets can be run in a web browser either from a web
server, or from the local file system (disk/CD). Web Server: When a
Java VM runs a Java applet from a web server, the Java applet is
authorized to access any file on the web server that applet came
from, but the applet can not access any file on another web server
or any file on the local file system (your PC).
Local File System: However, when a Java VM runs a Java applet
from a local file system (your hard drive), the Java applet is
authorized to access only files in the directory that the applet
came from (or any subdirectories). Also, the Java VM prevents an
applet from accessing files root of any drive/CD, as detailed in
the 06/20/2000 tech note [3], as operating system (OS)
configuration files (config.sys, autoexec.bat are usually located
there.
For example, the following table summarizes what an applet,
running from an HTML file test.html in the tours directory (with
the class file placed in the same tours directory) is allowed to
access: Can an applet in test.html (in tours folder) access... this
image when run from ../pan1.jpg ../images/pan2.jpg ./pan3.jpg
./images/pan4.jpg http://www.xyz.com/any.jpg
http://www.xyz.com/tours/ c:/tours/ yes yes yes yes NO NO NO yes
yes NO
Notice the discrepancy in access to pan1.jpg and pan2.jpg.
Depending upon where test.html is accessed from (a web server or
the local h drive), access to the same image can be either allowed
or denied. The problem is that running from the local hard drive is
more restrictive th running from a web server. Because when running
from a local hard drive, only files in the same directory as the
applet class files (or subdirectories) can be accessed by the
applet.
With proper planning, and by using the Java applet codebase tag,
this problem can be avoided. Namely, create all tours within a
directory tr use the codebase attribute within any tags [1] in HTML
to refer back to the one set of Java class files in the root of the
directory you created.
3. Java Applet Technical Notes Java Console TIP: If you are
experiencing problems with an applet, the first step is to open the
'Java Console' in your browser to check for messages:
Internet Explorer (Sun's Java): The Java Console option appears
under the Tools menu. Firefox: Right click on the Java tray icon
and select 'Java Console'.
Netscape Communicator: The Java Console is located in the 'Tools
/ Web Development' menu (or under 'Communicator' menu in older
versions). Internet Explorer (Microsoft Java): The Java Console
must first be enabled in 'Tools / Internet Options / Advanced /
Microsoft VM / Java console enabled'. After restarting your
browser, the 'Java Console' option will be available the 'View'
menu.
03/28/2006 -- Activating ActiveX Controls (Java) in Internet
Explorer -- Microsoft has changed how user's interact with ActiveX
(Ja controls on web pages. Previously, you could interact
immediately with controls. However, now there is an extra click.
Full details and a workaround. NOTE: the need for this extra click
has been removed by Microsoft in April 2008.
44
01/04/2006 -- Internet Explorer on Mac should no longer be used
-- Microsoft's Internet explorer for the Mac is no longer a product
Apple's Safari web browser should be used instead.
02/19/2001 -- Java Applets Cannot Be JavaScript'ed in Mac
Internet Explorer -- Microsoft Article ID Q190283 has complete
detail summary, Microsoft does not support JavaScript to Java
communication on the Mac. However, please note that Netscape on the
Mac and App Safari web browser both do support scripting. To work
around this problem, use a web browser that works, or use Native
scripting instead of JavaScript scripting.
10/30/2000 -- Do not use spaces in filenames -- Do not use
spaces in the filenames of images, etc (possible under a Windows
server) appears that this can cause problems with some browser /
server combinations. Namely, using a URL with a space works under
IE (the space automatically converted to %20), but fails under
Netscape.
09/08/2000 -- Netscape cannot read some JPEGs -- Some people
have reported that a panorama displays fine in Internet Explorer,
bu does not appear when using Netscape Navigator (and that the
Netscape java console window reports a
"sun.awt.image.ImageFormatExcep Image too wide for this
implementation" error). This particular problem has been traced to
Netscape being unable to read the JPEG at test this, create a URL
that points directly to the JPEG image file on the server and test
under both Netscape and Internet Explorer. If it does appear in
Netscape but it does within Internet Explorer, then you have run
into this problem. The graphics program you are using is producin
JPEG that Netscape is unable to read! Whether this is a problem
with the program you are using to write the JPEG (but Internet
Explorer wor with Netscape is unknown. The work-around is to use
another graphics program to write the JPEG.
06/24/2000 -- Avoid using transparent GIF images -- Make sure
that you avoid using transparent GIF images in applets, if
possible. I appears that many Java VM's take a significant
performance hit in order to display transparent GIF images. While
transparent GIF images do they may dramatically show down the
applet and cause jerky displays.
06/20/2000 -- Files in the root of a drive/CD cause security
errors -- If you attempt to locate class or image files into the
root direc of a drive or CD, you will experience problems due to
the Java applet security model [2] (that prevents applets from
accessing the root of a or CD). The work-around is to move your
class files and images into a directory/folder.
12/30/1999 -- MAYSCRIPT and Netscape -- If you use the MAYSCRIPT
applet tag on one applet, you must use the MAYSCRIPT tag on applets
on a web page. This is due to a bug in the Netscape web browsers.
If you use MAYSCRIPT in only one applet, a second applet can no
longer communicate with the first. Please note that this bug only
exists in the Netscape browsers and not in the Microsoft browsers.
Copyright 2000-2009 Duckware The "MAYSCRIPT" attribute of the HTML
element is used to do which one of the following? To To To To To
create an applet end a script when an error occurs convert a script
to binary code replace an applet with an equivalent script give a
Java applet access to a JavaScript script
ANS- To give a Java applet access to a JavaScript script Which
one of the following is a correct way to create an instance of a
Function object? funct funct funct funct funct = new.Function() =
new.Function = Function(new) == Function = new Function()
ANS: funct = new Function()
45
Sample Code
4) break iloop; if (j > 3) break jloop; } } // --> What
are the values of I and j after execution of the above code? i = 4,
j = 4 i = 4, j = 3 i = 5, j = 4 i = 5, j = 3
46i = 5, j = 5 ANS: i = 5, j = 4
Sample Code
var x; x = 5 * 5 * 5 * 5 * 5; Which one of the following is
equivalent to the code above? x = 5 + 5 + 5 + 5 + 5; x = 5 ^ 5; x =
5.toPower(5); x = Math.pow(5,5); x = Math.toPower(5,5); ANS: x =
Math.pow(5,5);
Which one of the following code samples changes the method of
TestForm to "GET"? document.TestForm.method = "GET";
document.TestForm.onsubmit = "GET";
document.TestForm.method("GET"); document.TestForm.onsubmit("GET");
document.TestForm.setMethod("GET"); ANS: document.TestForm.method =
"GET"; Sample Code function openWindow(x, y, z) { window.open(x, y,
z); } When called, the above function opens a new window with which
of the following? A URL of "y," a title of "z," and features of
"x." A URL of "x," a title of "y," and features of "z." A URL of
"y," a title of "x," and features of "z." A URL of "z," a title of
"y," and features of "x." A URL of "x," a title of "z," and
features of "y." ANS: A URL of "x," a title of "y," and features of
"z."
Sample Code What does the above code create? Five checkboxes and
a button that loads the selected document when clicked Five
hyperlinks A pull-down menu and a button that loads the selected
document when clicked Five buttons, each loading a corresponding
URL when clicked Five radio buttons and a button that loads the
selected document when clicked ANS: Five buttons, each loading a
corresponding URL when clicked
Sample Code
c) x += 1; (a > (b + c)) x += 1; ((b > c) && (c
> a)) x += 1; ((c > a) || (b > c)) x += 1;
// --> What is the value of x after the above script is run?
1 2 3 4 5
48
ANS:2
Sample Code
var newWindow = open(url, title, args); To which one of the
following does newWindow.opener refer in the above code? newWindow
itself The window that opened newWindow The URL with which
newWindow is opened The top window The navigator object ANS: The
window that opened newWindow
The opener property returns a reference to the window that
created the windowThe referrer property returns the URL of the
document that loaded the current document
The items in which one of the following pairs do the same thing?
history.go( history.length) and history.go(0) history.forward() and
history.go() history.go(-2) and history.back() history.back() and
history.go(-1) history.forward(1) and history.go(0)
ANS: history.back() and history.go(-1)
Which one of the following is true of local variables? They are
always in scope. They are declared using the "var" command. They
are not accessible to sub-blocks. They are only referenced inside
the block in which they are declared. They are accessible
throughout the JavaScript code. ANS: They are only referenced
inside the block in which
49they are declared.
Output
One, Two.. What code produces the above output?
document.write("One,\nTwo..\n"); document.write('One,\nTwo..\n');
document.write('One,\nTwo..\n'); document.writeln("One,');
document.writeln('Two ');
document.writeln('One,');document.write('Two '); ANS:
document.write('One,\nTwo..\n');
Code
txt = new String("Sample text."); function textColor() { return
"" + this + ""; } Using the code above, what code assigns a "color"
property to all string objects defaulted "gray" and facilitates
printing colored text to a browser? String.color = "gray";
String.colored = textColor; color.String = "gray" String.txt.color
= "gray" String.color = "gray" String.prototype.color = "gray";
String.prototype.colored = textColor; ANS: String.prototype.color =
"gray"; String.prototype.colored = textColor;
Code
function calc(form,fld) { var d = 0; if(fld == "r") {
if(form.s.checked) { d=Math.sqrt(form.r.value); } else {
d=form.r.value/2; } } else { if (form.s.checked) { d = form.e.value
* form.e.value; } else { d = form.e.value * 2; } } return d; }
Referring to the above code, if checkbox "s" is checked, and
parameter "fld" is equal to "q," what does function calc
return?
50"e" squared "r" * 2 null "r"/ 2 square root of "e" ANS: "e"
squared
Q: // --> Referring to the above, which one of the following
code fragments will output the value of x? window.output(x);
document.output(x); window.writeln(x); window.document.writeln(x);
String.output(x); ANS: window.document.writeln(x);
Q: In the above code, to which one of the following does "this"
refer? document textObject checkText form window ANS:FORM
51
Q: i=0; total=0; while(i 2) break; total += i; } What is the
value of "total" after execution of the code above? 0 1 2 3 6
ANS:3
Q:If you wanted to put "Hello There!" on the status line, which
one of the following code fragments does that? self.status = "Hello
There!"; return true; self.status.value = "Hello There!"; return
true; self.document.status.setValue("Hello There!"); return true;
self.status.setValue("Hello There!"); return true;
self.setStatus("Hello There!"); return true; ANS: self.status =
"Hello There!"; return true;
52
53
1. 'url to open'
This is the web address of the page you wish to appear in the
new window. 2. 'window name' You can name your window whatever you
like, in case you need to make a reference to the window later. 3.
'attribute1,attribute2' As with alot of other things, you have a
choice of attributes you can adjust.
Window Attributes
54
Below is a list of the attributes you can use:1. width=300
Use this to define the width of the new window.2. height=200
Use this to define the height of the new window.3. resizable=yes
or no
Use this to control whether or not you want the user to be able
to resize the window.4. scrollbars=yes or no
This lets you decide whether or not to have scrollbars on the
window. 5. toolbar=yes or no Whether or not the new window should
have the browser navigation bar at the top (The back, foward, stop
buttons..etc.). 6. location=yes or no Whether or not you wish to
show the location box with the current url (The place to type
http://address). 7. directories=yes or no Whether or not the window
should show the extra buttons. (what's cool, personal buttons,
etc...). 8. status=yes or no Whether or not to show the window
status bar at the bottom of the window. 9. menubar=yes or no
Whether or not to show the menus at the top of the window (File,
Edit, etc...). 10. copyhistory=yes or no Whether or not to copy the
old browser window's history list to the new window.
Q:Site Map Which one of the following is true of the above code?
It opens a new status window with document text "Click for Help!"
It creates a hyperlink that says "Click for Help!"
55Most browsers will interpret this as a syntax error. It
displays a help message in the status bar when mouse is over the
hyperlink. It does nothing because the JavaScript language is not
specified.
ANS: It displays a help message in the status bar when mouse is
over the hyperlink.
Which event handler or handlers are used to track a user's moves
between fields in an HTML form? onFocus and onBlur onChange focus
and blur load and unload
onLoad and onUnloadANS: onFocus and onBlur
Q:To delete an element from an array of Option objects attached
to a DOM Selectobject, you set its reference equal to which one of
the following? -1 null 0 NaN
false
ANS; null
56
Q:var x; var y; x = new Array(3); x[0] = 1; x[1] = 2; x[2] = 3;
y = new Array(3); y[0] = 1; y[1] = 2; y[2] = 3;Referring to the
above, which one of the following is true? x.toString() ==
y.toString() x.equals(y) x == y x equals y
None of the aboveANS: x.toString() == y.toString()
Which one of the following is a DRAWBACK of JavaScript? It
cannot be copy-protected. It does not work with Html forms. It is
platform independent. It only works with Netscape browsers.
It does not work with CGI. ANS: It cannot be copy-protected.
57
Q:var index = 0; do { index++; document.writeln(index); } while
(index < 10);Which one of the following code segments is
equivalent to the code above?
1. var index = 1; do { document.writeln(++index); } while (index
Option 1 Option 2 Option 3 What does the above script do in
Internet Explorer?
It changes the title of the top level document to the value of
the selected option. It changes the title of the document in all
open browser windows. It outputs the selected title to the
document's window. It changes the selected index to the value of
the selected option.
It changes the title of the document in the current frame.
64 Ans: It changes the title of the top level document to the
value of the selected option How can you get the width of the
user's screen in JavaScript? self.getWidth() self.width
self.screen.width
self.document.getWidth() self.get("width")ANS:Self.width
self.screen.widthSample Code function test(x, y) { return
(Math.sqrt(x*x + y*y)); } function test2(x, y) { return (x ^ y); }
document.writeln(test2(test(3,4),3)); What does the above code
print? 2 4 6 25 125 ANSWER:6
Code
var x=0; var y=0; var z=0; x = 1; x = (-x + y++) * ++z; What is
the value of "x" after execution of the code above? -2 -1 0 1 2
ANSWER:-1
65
Q:For which one of the following is the default keyword used? To
create a default function To import the default style for the
document To execute the default code in a switch statement To
specify a default document if an href is incorrect To use the
default JavaScript files for the site ANSWER: To execute the
default code in a switch statement
Sample Code
What does the above code do? It loads up errorpage.html when the
page with this script is first loaded. If there is an error in the
document, it loads up errorpage.html. It creates an error because
the window object does not have an onerror property. If there is an
error in any window, it loads up errorpage.html. It creates an
error because the self object does not have an onerror
property.
ANSWER: If there is an error in the document, it loads up
errorpage.html.Code var sample = "test";
sample.big().blink().bold().strike(); sample=sample.fontsize(7);
document.write(sample.italics()); Referring to the above code, the
document shows the word "test" with what style characteristics?
Size 7, blinking, bold, strikethrough, and italic Size 7 and italic
only Italic only Blinking, bold, strikethrough, size 8, and italic
Default for the document
66ANSWER: Size 7 and italic only
Sample Code
var season; /* code segment */ switch (season) { case 1:
document.writeln("Winter"); break; case 2:
document.writeln("Spring"); break; case 3:
document.writeln("Summer"); break; case 4:
document.writeln("Autumn"); } Which one of the following code
segments always will output "Summer" in the code above? season = 4;
season = Math.ceil(Math.random() * 4); season = "Winter"; season =
Math.ceil(Math.random()) * 3; season = "Summer"; ANSWER: season =
Math.ceil(Math.random()) * 3;
var test = "Navigator"; test=test.substring(3,0); Referring to
the above code, what is the value of "test" after execution? Nav
Naviga iga tor igator ANSWER: NAV
Q: function echo(form,currentfield) { if(currentfield ==
"first") form.second.value=form.first.value; else
form.first.value=form.second.value; } Function echo() above does
which one of the following? It copies the text from the second
field to the first.
67It moves the text from the second field to the first. It moves
the text from the first field to the second. It swaps the text
entered between fields. It copies the text from the first field to
the second. ANSWER: It copies the text from the first field to the
second. It swaps the text entered between fields What does the
referrer property of the document object contain? The history
object The URL that linked to the current document The current URL
The URL in the URL line in the browser The name of the window that
opened the document
ANSWER: The URL that linked to the current document
What does the value of a reset button contain? The button object
The button label The button type The reset property The button name
The button label
JavaScript Features
A can not directly access client computer resources B can not
collect or give out passwords C can not access other computers
remotely D uses 40 bit encryption Referring to the above code,
JavaScript security is enhanced because of which one of the
following pairs? A and B B and C C and D A and C
68B and D
ANS: A and C
What properties contain the name and version of the browser in
use? document.cookie navigator.appName and navigator.appVersion
document.host and document.hostVersion browser.name and
browser.version This information is not readily available.
ANS:
navigator.appName and navigator.appVersion
Code
test Referring to the above code, when the "onMouseOver" event
fires, the status line displays which one of the following? The
word "test" The current document URL with "Example" after it The
current document URL with a "#" after it The word "Example" The "#"
symbol
ANS: The current document URL with a "#" after it The word
"Example"
The alert method belongs to which object? location document
window It does not belong to any object. input
ANS: window
69Code function wContent(thisPage) {
parent.content.document.write("");
parent.content.document.write("Page "+ thisPage+".");
parent.content.document.close(); } Referring to the above code,
what code writes content into the main window? Page1 Page1 Page1
Page1 Page1 ANS: Dont know Page1
num = 0; while(num Option 1 Option 2 Option 3 Option 4 Option 5
Given the above, what is the value of
document.TestForm.TestSelect.length? 1 2 3 4 5
ANS: 5
How do you create a new DOM cookie? Clone another cookie. Call
document.newCookie(). Assign values to the document.cookie
property. Reset the expiration date on an existing cookie. Call
newCookie(). ANS: Assign values to the document.cookie
property.
Sample Code
Where does clicking the submit button in the above code take
you?
77"somewhere.on.net" main page "somewhere.on.net" main page,
then back three pages Back three pages Back three pages, then to
the "somewhere.on.net" main page It will give a JavaScript error.
ANS: Back three pages
Which one of the following is NOT a JavaScript method used to
emulate an event? submit() select() load() focus() click() ANS:
submit() ??
Code
function loadOver() { code here } Referring to the above code,
what statement inside function loadOver() causes button "Reload" to
emulate the Refresh button of a browser?
parent.ctr.location="javascript:location.reload()"
self.counter.location="location.history(0)" location.reload()
document.location.href = this parent.history(0) ANS:
location.reload()
Sample Code
var x = 1; x = new Function("x", "y", "return 4;"); What is the
value of x.length after executing the above code segment? 0 1 2 3 4
ANS: 2
78
What do server-side session objects generally use on the client
side to keep track of the user's session? document.referrer
document.session The history object. cookies The window object.
ANS: cookies Cookies and Sessions - Session variables are
maintained as cookies on the client so the client browser must have
cookies enabled in order for the server to maintain session
variables, otherwise the server sees every access by the same
client as a new session when cookies are disabled. The server
script can test whether session state is being maintained (i.e.
cookies enabled) by: 1. setting a session variable, 2. immediately
invoke another ASP that tests if the session variable is still
defined, 3. if not defined then most likely the browser isn't
accepting cookies.
What code captures the user's name, or "Name," if the user
clicks OK WITHOUT entering a name? alert("Hello, " + confirm("Enter
Your Name:")) alert("Hello, " + alert("Enter Your Name:"))
alert("Hello, " + prompt("Enter Your Name:","Name") + ".")
prompt("Hello, " + prompt("Enter Your Name:","Name") ".")
alert("Hello, ") + prompt("Enter Your Name:") ANS: alert("Hello, "
+ prompt("Enter Your Name:","Name") + ".")
document.write(''); document.writeln("
Test"); document.write("JS!"); Which one of the following is
equivalent to the above code?
79document.writeln(Test\nJS!) document.write('
Test\nJS!') document.writeln('')
Test\nJS! document.write('
Test\nJS! ') document.write("Test\nJS!")
ANS: document.write('
Test\nJS! ') Which one of the following is the form object's only
method? send() submit() click() focus() select() ANS: submit() What
code always brings window "newWindow" to the front?
newWindow.position(top) newWindow.focus() setPosition.newWindow.top
newWindow.Visibility(top) onFocus.newWindow.show
ANS:
newWindow.focus()
Other than a checkbox, which other form element has a "checked"
property? hidden select input option radio
ANS: radio
80Code function surfto(form) { var idx=form.s1.selectedIndex
if(form.s1.options[idx].value != 0)
location=form.s1.options[idx].value; } Choose One U2 U3 U4 Which
one of the following does the above code create? Four hyperlinks
Four buttons, each loading a corresponding URL when clicked Four
check boxes and a button that loads the selected document when
clicked A pull-down menu and a button that loads the selected
document when clicked A pull-down menu with four choices that loads
a selected when focus is removed
When the following code is executed in Netscape: x = new
Java.lang.Double(2.05); what type of object is x? Double var ans
JavaObject Number Float JavaObject
var x = 15%4; Referring to the above code, what is the value of
variable "x"? 0 1 2 3 ans 4
Which one of the following objects is NOT a form element?
81
password input link select hidden
Ans :link
Sample Code
var x; x = Array(2,5,10); Referring to the above, how many
elements are in the array x? 3 4 10 11 100
Ans :3
Code
Referring to the above code, what code initially places the
cursor in text field "a"?
Ans: delete car.fivespeed; The above code deletes which one of
the following? The car class
82The fivespeed property from the car class The fivespeed
property from object car Object car Nothing Ans The fivespeed
property from object car function Pass() {
document.jane.elements[0].value=
document.joe.elements[0].value;
}
Q Referring to the above code, what happens to the text when the
user types "Hello" into the first text control and then clicks the
button? Nothing, function "Pass()" contains an error. It is moved
to the second text control. It is left in the first text control.
It is deleted from the first text control. It is copied to the
second text control.
Ans:
It is copied to the second text control.
Following are some questions whose answers are unknown..
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