Programming revision

Revision tip: Focus on the

things you find difficult first.

Task Time (minutes) a

1. Complete self assessment sheet. 2 2. Read through the chapter on programming. 15 3. Work through the questions on the revision

template focusing

on weaker areas first.

25

4. Attempt the multiple choice test on Edmodo. 10 5. Attempt the past paper exam questions. 20 6. Mark past paper exam paper questions. 15 7. Read through the chapter on programming. 15 8. Attempt the multiple choice test on Edmodo again. 10

“Every lesson counts – don’t waste a minute.”

Flowcharts. 1. Draw a flowchart to describe the following process:

Input 5 values

Output their average

(4 marks)

2. Draw a flowchart to describe the following process:

Input radius for a circle.

Check it is positive.

Reject and ask for input if not positive.

Output the circumference of the circle if positive.

(4 marks)

Exam tip: If you are asked to draw a flowchart try use the correct Symbols, but it is the logic that will be tested.

Pseudocode. 1. Write a pseudocode algorithm to describe how to get the

information and output the area of a triangle.

(3 marks)

Exam tip: Always use indents to show loops and conditions when writing pseudocode.

2. Write the pseudocode to describe how to calculate the

average of 10 numbers.

(6 marks)

Programming languages. Exam tip: You should be able to state the advantages / disadvnatges when asked to compare translators.

1. What are the main advantages of a high-

level langauge over a low-level langauge?

(4 marks)

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2. Compare an interpreter and a compiler for

use by a student learning to program.

(4 marks)

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3. What are the advantages of compiling

code for commercial distribution?

(4 marks)

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Integrated Development Environment (IDE)

Exam tip: You should be able to identify the features of an IDE and explain how the features help a developer create a program more effectively.

Control flow in imperative languages.

Exam tip: You should be able to identify the three different types of control flow (sequence, selection, iteration) from a piece of Code.

1. Identify which control flow the following

programs will use:

(3 marks)

(a) Deciding whether to give a discount to a

customer for having a loyalty card.

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(b) Inputting 10 numbers to be totalled.

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(c) Setting up the computer when it is switched

on.

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2. Write the pseudocode using a Repeat-

until loop to output the first five square

numbers.

(2 marks)

3. Repeat question 2 but this time use a

While-Endwhile loop.

(3 marks)

1. What are the main features of an IDE?

(4 marks)

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2. How do the features of an IDE help to create maintainable code?

(4 marks)

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Data types. 1. An online retailer keeps data about stock in their database. Items of stock are identified by a single letter, F for furniture, G for garden, P for pet,

followed by a four digit number. They also store the quantity in stock, the retail price and whether there are more on order or not.

Complete the information in this table.

(3 marks)

Exam tip: You will be expected to identify the most suitable data type for a variable. Remember telephone numbers and other numbers used purely for identification should be stored as strings.

Variables & constants. Exam tip: Learn the definitions for the data types and for variables and for constants.

1. Constant VAT = 0.2

INPUT WholesalePrice

RetailPrice = WholesalePrice + WholesalePrice * VAT

OUTPUT RetailPrice

In the code above:

(a) Identify a constant.

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(b) Identify the variables.

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2. Describe the difference between a variable and a constant. (2 marks)

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3. What is a variable? (2 marks)

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4. What data type will be used for RetailPrice and why? (2 marks)

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Operations. Exam tip: Note if num1 ad num2 are integers, +, -, *, MOD and DIV will return integer values but / may not and the result could be a real number (float).

Comparison operators. Operator priority.

What value is stored in the variable result if:

(6 marks)

(a) Result = 7/2 ………………

(b) Result = 27 MOD 4 ………………

(c) Result = 36 MOD 6 ………………

(d) Result = 23 DIV 4 ………………

(e) Result = 36 DIV 6 ………………

What value is stored in the variable result if:

(6 marks)

(a) num1 > num2 if num1 = 7 and num2 = 5 ………………

(b) num1 <= num2 if num1 = 7 and num2 = 5 ………………

(c) num1 < > num2 if num1 = 7 and num2 = 5 ………………

(d) num1 < > num2 AND num 1 < num2 if num1 = 7 and num2 = 5 ..............

(e) num1 < > num2 OR num1 = num2 if num1 = 7 and num2 = 5 ................

What value is stored in the variable result if:

(6 marks)

(a) Value = 17-3*4 ………………

(b) Value = (17-3)*4 ………………

(c) Value = 7*8/2 ………………

(d) Value = 7+8/4 ………………

(e) Value = 17 MOD 3 + 4 ………………

(f) Value = 17 MOD (3+4) ......................

Testing. Exam tip: You will be expected to identify the most suitable data type for a variable. Remember telephone numbers and other numbers used purely for identification should be stored as strings.

1. What is meant by a syntax error? Give an example. (2 marks)

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2. What is meant by a run-time errorr? Give an example. (2 marks)

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3.

A = 3

B = 5

A + B = C

The above code contains an error. What is the error and what type of error is it? (2 marks)

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4.

INPUT customer

INPUT cash

IF customer = ‘yes’ AND cash > 50 THEN

rate = 11

ELSE IF customer = ‘no’ AND cash < 50 THEN

rate = 9

ELSE

rate = 10

ENDIF

ENDIF

OUTPUT cash * rate

For the algorithm opposite state what the output will be for the following input values:

(a) Customer = no, cash = 20 ....................... (1 mark)

(b) Customer = yes, cash = 100 ....................... (1 mark)

(c) Customer = yes, cash = 20 ....................... (1 mark)

(d) Customer = no, cash = 60 ....................... (1 mark)

Past paper exam questions. 2011 past paper.

Past paper answers. 2011 past paper. Notes: What do I need to improve?

Past paper exam questions. 2012 past paper.

Past paper exam questions. 2012 past paper.

Past paper answers. 2012 past paper.

Notes: What do I need to improve?

Past paper answers. 2012 past paper.

Notes: What do I need to improve?

Past paper exam questions. 2013 past paper.

Past paper exam questions. 2013 past paper.

Past paper answers. 2013 past paper.

Notes: What do I need to improve?

Past paper answers. 2013 past paper.

Notes: What do I need to improve?