The schmitt trigger may be used to?

[A]change voltage to corresponding frequency

[B]Change frequency to voltage

[C]Square slowly varying input

[D]None of above

Answer0 Discussions

00

Answer:C. Square slowly varying input

2.Which of the following is minimum error code?

[A]Octal code

[B]Grey code

[C]Binary code

[D]Excess 3 code

Answer0 Discussions

00

Answer:B. Grey code

3.Popular application flip-flop are ?

[A]Counters

[B]Shift registers

[C]Transfer registers

[D]All of above

Answer0 Discussions

00

Answer:D. All of above

4.SR Flip flop can be converted to T-type flip-flop if ?

[A]S is connected to Q

[B]R is connected to Q

[C]Both S and R are shortend

[D]S and R are connected to Q and Q' respectively

Answer0 Discussions

00

Answer:D. S and R are connected to Q and Q' respectively

5.Register is a ?

[A]Set of capacitor used to register input instructions in a digital computer

[B]Set of paper tapes and cards put in a file

[C]Temporary storage unit within the CPU having dedicated or general purpose use

[D]Part of the auxiliary memory

Answer0 Discussions

00

Answer:C. Temporary storage unit within the CPU having dedicated or general purpose use

6.For which of the following flip-flop the output clearly defined for all combinations of two inputs?

[A]Q type flip-flop

[B]R S type flip-flop

[C]J K flip-flop

[D]T flip-flop

Answer0 Discussions

00

Answer:C. J K flip-flop

7.A simple flip-flop

[A]is 2 bit memory

[B]is 1 bit memory

[C]is a four state device

[D]has nothing to do with memory

Answer0 Discussions

00

Answer:B. is 1 bit memory

8.An SR flip flop cannot accept the following input entry

[A]Both input zero

[B]zero at R and one at S

[C]zero at S and one at R

[D]Both inputs one

Answer0 Discussions

00

Answer:D. Both inputs one

9.The main difference between JK and RS flip-flop is that?

[A]JK flip-flop does not need a clock pulse

[B]there is feedback in JK flip-flop

[C]JK flip-flop accepts both inputs as 1

[D]JK flip-flop is acronym of junction cathode multivibrator

Answer0 Discussions

00

Answer:C. JK flip-flop accepts both inputs as 1

10.Radix of binary number system is _____?

[A]0

[B]1

[C]2

[D]A & B

00

Answer:C. 2

Explanation:Radix or Base of Binary Number System is 2.

11.Any number with an exponent of zero is equal to:

[A]zero

[B]one

[C]that number

[D]ten

Answer0 Discussions

00

Answer:B. one

12.Any number with an exponent of zero is equal to:

[A]one

[B]zero

[C]that number

[D]ten

Answer0 Discussions

00

Answer:A. one

13.What is a digital-to-analog converter?

[A]It allows the use of cheaper analog techniques, which are always simpler.

[B]It takes the digital information from an audio CD and converts it to a usable form.

[C]It converts direct current to alternating current.

[D]It stores digital data on a hard drive.

Answer0 Discussions

00

Answer:B. It takes the digital information from an audio CD and converts it to a usable form.

Explanation:A DAC converts an abstract finite-precision number (usually a fixed-point binary number) into a concrete physical quantity (e.g., a voltage or a pressure).

14.The output of an AND gate is LOW ________.

[A]when any input is LOW

[B]all the time

[C]when all inputs are HIGH

[D]when any input is HIGH

Answer0 Discussions

00

Answer:A. when any input is LOW

15.The output of an OR gate is LOW when ________.

[A]all inputs are LOW

[B]any input is LOW

[C]any input is HIGH

[D]all inputs are HIGH

Answer0 Discussions

00

Answer:A. all inputs are LOW

16.When used with an IC, what does the term "QUAD" indicate?

[A]4 circuits

[B]2 circuits

[C]8 circuits

[D]6 circuits

Answer0 Discussions

00

Answer:A. 4 circuits

17.How many pins does the 4049 IC have?

[A]20

[B]16

[C]14

[D]18

Answer0 Discussions

00

Answer:B. 16

18.The Boolean expression for a 3-input AND gate is ________.

[A]X = AB

[B]X = ABC

[C]X = A + B + C

[D]X = AB + C

Answer0 Discussions

00

Answer:B. X = ABC

19.What is the Boolean expression for a three-input AND gate?

[A]X = A + B + C

[B]X = A B C

[C]A ?? B ?? C

[D]A $ B $ C

Answer0 Discussions

00

Answer:B. X = A B C

20.

What is the Boolean expression for a three-input AND gate?

[A]X = A + B + C

[B]X = A B C

[C]A B C

[D]A $ B $ C

Answer0 Discussions

00

Answer:B. X = A B C

21.Which of the following expressions is in the sum-of-products (SOP) form?

[A]AB + CD

[B]AB(CD)

[C](A + B)(C + D)

[D](A)B(CD)

Answer0 Discussions

00

Answer:A. AB + CD

22.The systematic reduction of logic circuits is accomplished by:

[A]symbolic reduction

[B]using Boolean algebra

[C]TTL logic

[D]using a truth table

Answer0 Discussions

00

Answer:B. using Boolean algebra

23.In the decimal numbering system, what is the MSD?

[A]The middle digit of a stream of numbers

[B]The digit to the right of the decimal point

[C]The last digit on the right

[D]The digit with the most weight

Answer0 Discussions

00

Answer:A. The middle digit of a stream of numbers

24.Which of the following statements does NOT describe an advantage of digital technology?

[A]The values may vary over a continuous range.

[B]The circuits are less affected by noise.

[C]The operation can be programmed.

[D]Information storage is easy.

Answer0 Discussions

00

Answer:A. The values may vary over a continuous range.

25.The generic array logic (GAL) device is ________.

[A]one-time programmable

[B]reprogrammable

[C]a CMOS device

[D]reprogrammable and a CMOS device

Answer0 Discussions

00

Answer:B. reprogrammable