Computer Science - Digital Computer Electronics MCQs Part 5

1. What is the ASCII code for T?

A.
1010100

B.
1011010

C.
1011100

D.
1011111

E.
None of the above

 Answer Option A

2. Express 8192 in K units.

A.
8 x 103 K

B.
8.192 k

C.
8K

D.
All of the above

E.
None of the above

 Answer Option C

3. The functional capacity for LSI devices is

A.
1 to 11 gates

B.
12 to 99 gates

C.
100 to 10,000 gates

D.
more than 10,000 gates

E.
None of the above

 Answer Option C

4. What is the 2's-complement representation of -24 in a 16-bit microcomputer?

A.
0000 0000 0001 1000

B.
1111 1111 1110 0111

C.
1111 1111 1110 1000

D.
0001 0001 1111 0011

E.
None of the above

 Answer Option C

5. Which gates is known as universal gate?

A.
NOT gate

B.
AND gate

C.
NAND gate

D.
XOR gate

E.
None of the above

 Answer Option C

6. _____is an abbreviation for binary digit.

A. 0 and 1

B. bingit

C. base

D. bit

E. None of the above

 Answer Option D

7. Conversion of hexadecimal number 1D7F16 to a decimal number is

A. 755110

B. 877110

C. 555710

D. 778110

E. None of the above

 Answer Option A

8. An inventor is a gate with only _____ input; the output is always in the opposite state from the input

A. one

B. two

C. more than one

D. All of the above

E. None of the above

 Answer Option A

9. Parallel adders are

A. combinational logic circuits

B. sequential logic circuits

C. both of the above

D. All of the above

E. None of the above

 Answer Option A

10. A microcomputer is a computer that uses a _____ for its CPU.

A. chips

B. registers

C. microprocessor

D. vacuum tube

E. None of the above

 Answer Option C

11. Which of the following is a universal gate?

A. AND

B. OR

C. EX-OR

D. NAND

E. None of the above

 Answer Option D

12. The number of input words in a truth table always equals _____ where n is the number of inputs bits.

A. 10n

B. 2n

C. 4n

D. 8n

E. None of the above

 Answer Option B

13. Conversion of decimal number 6110 to it's binary number equivalent is

A. 1111012

B. 1111002

C. 1100112

D. 0011012

E. None of the above

 Answer Option A

14. Multiplication of 478 by 528 is

A. (3144)8

B. (4147)8

C. (3146)8

D. (3184)8

E. None of the above

 Answer Option C

15. Which of the following boolean algebra statements represent commutative law

A. (A+B)+CA+(B+C)

B. A.(B+C)(A.B)+(A.C)

C. A+BB+A

D. A+AA

E. None of the above

 Answer Option C

16. Binary-Coded-decimal (BCD) numbers express each digit as a _____

A. byte

B. nibble

C. bit

D. All of the above

E. None of the above

 Answer Option B

17. Computers use thousands of flip-flops. To coordinate the overall action, a common signal called the _____ is sent to each flip-flop.

A. latch

B. clock

C. master

D. slave

E. None of the above

 Answer Option B

18. Conversion of decimal number 9310 to hexadecimal number is

A. 2D16

B. 5D16

C. 6216

D. 3116

E. None of the above

 Answer Option B

19. Conversion of decimal number 9910 to it's octal number equivalent is

A. 1218

B. 1438

C. 1248

D. 1198

E. None of the above

 Answer Option B

20. The 2's compliment of binary number 0.01011 is:

A. 1.10101

B. 0.10101

C. 1.10100

D. 0.10100

E. None of the above

 Answer Option A

21. The _____ gate has two or more input signals. All inputs must be high to get a high output

A. OR

B. NAND

C. AND

D. NOR

E. None of the above

 Answer Option C

22. Conversion of an octal number 1428 to binary number is

A. 11000102

B. 1101102

C. 11000112

D. 11011012

E. None of the above

 Answer Option A

23. Conversion of hexadecimal number 93FA16 to it's binary number equivalent is

A. 10010011111110102

B. 100100111111101112

C. 1100111111100112

D. 1111100001112

E. None of the above

 Answer Option A

24. BCD numbers are useful whenever _____ information is transferred into or out of a digital system.

A. decimal

B. binary

C. ASCII

D. hexadecimal

E. None of the above

 Answer Option A

25. A NOR gate recognizes only the input word whose bits are _____

A. 0's and 1's

B. 1's

C. 0's

D. 0's or 1's

E. None of the above

 Answer Option C

26. How many bytes are there in 1011 1001 0110 1110 numbers?

A. 1

B. 2

C. 4

D. 8

E. None of the above

 Answer Option B

27. Consider as RS flip-flops with both inputs set to 0. If a momentary '1' is applied at the input S, then the output

A. Q will flip from 0 to 1

B. Q will flip from 0 to 1 and then back to 0

C. Q will flip from 0 to 1

D. Q will flip from 0 to 1 and then back to 0

E. None of the above

 Answer Option A

28. Which of the following logic expression is wrong?

A. 1 + 0=1

B. 1 + 1=0

C. 1+0+1 = 1

D. 1 + 1 + 1 = 1

E. None of the above

 Answer Option C

29. Subtraction of 1001011002 from 11101010102 is

A. 10010111102

B. 01101000012

C. 11110000012

D. 11110111112

E. None of the above

 Answer Option A

30. Addition of 1101012 and 1011112 is

A. 11001002

B. 11010002

C. 11101112

D. 1100112

E. None of the above

 Answer Option A

31. Conversion of an octal number 1348 to a binary number is

A. 0010110112

B. 0011011002

C. 0010111002

D. 1100112

E. None of the above

 Answer Option C

6. _____is an abbreviation for binary digit.

A. 0 and 1

B. bingit

C. base

D. bit

E. None of the above

 Answer Option D

7. Conversion of hexadecimal number 1D7F16 to a decimal number is

A. 755110

B. 877110

C. 555710

D. 778110

E. None of the above

 Answer Option A

8. An inventor is a gate with only _____ input; the output is always in the opposite state from the input

A. one

B. two

C. more than one

D. All of the above

E. None of the above

 Answer Option A

9. Parallel adders are

A. combinational logic circuits

B. sequential logic circuits

C. both of the above

D. All of the above

E. None of the above

 Answer Option A

10. A microcomputer is a computer that uses a _____ for its CPU.

A. chips

B. registers

C. microprocessor

D. vacuum tube

E. None of the above

 Answer Option C