Computer Science - Digital Computer Electronics MCQs Part 3
1. A binary adder is a logic circuit that can add _____ binary numbers at a time.
A.
Hundreds
Hundreds
B.
Thousands
Thousands
C.
One
One
D.
Two
Two
E.
None of the above
None of the above
Answer Option D
2. A half-adder adds _____ bits
A.
16
16
B.
8
8
C.
10
10
D.
2
2
E.
None of the above
None of the above
Answer Option D
3. The 2764 is 65,536-bit EPROM organized as 8,192 words of 8 bits each. How many address lines does it have?
A.
12
12
B.
14
14
C.
13
13
D.
8
8
E.
None of the above
None of the above
Answer Option C
4. What does 4k represent?
A.
4000
4000
B.
4096
4096
C.
40
40
D.
400
400
E.
None of the above
None of the above
Answer Option B
5. Conversion of decimal number 4210 to it's octal number equivalent is
A.
578
578
B.
428
428
C.
478
478
D.
528
528
E.
None of the above
None of the above
Answer Option D
6. The _____ is ultraviolet-light-erasable and electrically programmable. This allows the user to erase and store until programs and data are perfected.
A. EPROM
B. ROM
C. PROM
D. RAM
E. None of the above
Answer Option A
7. The logic 1 in positive logic system is represented by:
A. zero voltage
B. lower voltage level
C. higher voltage level
D. negative voltage
E. None of the above
Answer Option C
8. Conversion of decimal number 9910 to it's binary number equivalent is
A. 11000112
B. 1000112
C. 11100012
D. 111 10002
E. None of the above
Answer Option A
9. The number of two-input NAND gates required to produce the two-input OR function is
A. 1
B. 2
C. 3
D. 4
E. None of the above
Answer Option C
10. A 2's-complement adder-subtracter can add or subtract binary numbers. Sign-magnitude numbers represent _____ decimal numbers, and 2's complements stand for _____ decimal numbers.
A. hexa, sign
B. sign, hexa
C. positive, negative
D. negative, positive
E. None of the above
Answer Option C
11. Which of the following is not functionally a complete set?
A. AND, OR
B. NAND
C. NOR
D. AND, OR, NOT
E. None of the above
Answer Option A
12. The fan-out capability of a digital building block can be defined as
A. the number of inputs that one output can transmit to
B. the amount of cooling required for fanning the hear out
C. the number of inputs that can transmit to one input
D. the maximum power dissipation (heat generation) that the unit can stand.
E. None of the above
Answer Option A
13. Conversion of an octal number 738 to binary number is
A. 1101112
B. 1111002
C. 1100102
D. 1110112
E. None of the above
Answer Option D
14. Conversion of binary number 11000012 to hexadecimal is
A. 5716
B. 6116
C. 5116
D. 4316
E. None of the above
Answer Option B
15. The main advantage of hexadecimal numbers is the case of conversion from hexadecimal to _____ and vice versa.
A. decimal
B. binary
C. ASCE
D. BCD
E. None of the above
Answer Option B
16. Which of the following TTL subfamily is the fastest
A. standard TTL
B. high-speed TTL
C. schottky TTL
D. low-speed TTL
E. None of the above
Answer Option C
17. The leading bit stands for the _____ and the remaining bits for the _____ is known as signed binary numbers.
A. sign, remainder
B. sign, magnitude
C. value, sign
D. variable, value
E. None of the above
Answer Option B
18. A multiplexer is also known as
A. coder
B. decoder
C. data selector
D. multivibrator
E. None of the above
Answer Option C
19. Standard TTL has a multiple emitter input transistor and a _____ output
A. totem-pole
B. bipolar
C. register
D. transistor
E. None of the above
Answer Option A
20. A shift register moves the _____ left or right. Serial loading means storing a word in a shift register by entering _____ bit per clock pulse. With parallel or broadside loading, it takes only one _____ pulse to load the input word.
A. light, eight, clock
B. right, eight, clock
C. bits, one, register
D. bits, one, clock
E. None of the above
Answer Option D
21. A flip-flop can store:
A. 1 bits of data
B. 2 bits of data
C. 3 bits of data
D. 4 bits of data
E. None of the above
Answer Option A
22. A logic circuit which is used to change a BCD number into an equivalent decimal number is
A. decoder
B. encoder
C. multiplexer
D. code converter
E. None of the above
Answer Option A
23. Cyclic codes are used in
A. data transfer
B. continuously varying signal representation
C. arithmetic and logical computation
D. All of the above
E. None of the above
Answer Option B
24. The digits used in a binary number system are _____ and _____
A. 9 and 0
B. 0 and 1
C. 1 and 2
D. 3 and 4
E. None of the above
Answer Option B
25. The 2-input XOR gate has a high output only when the input bits are _____
A. even
B. different
C. low
D. high
E. None of the above
Answer Option B
26. Conversion of binary number 10010102 to to its decimal number is
A. 7410
B. 9710
C. 7210
D. 6310
E. None of the above
Answer Option A
27. A combinational logic circuit which generates particular binary word or number is
A. decoder
B. multiplexer
C. encoder
D. demultiplexer
E. None of the above
Answer Option B
28. The 1's compliment of binary number 11010 is:
A. 00101
B. 00010
C. 00110
D. 11101
E. None of the above
Answer Option A
29. Conversion of binary number 1100002 to hexadecimal is
A. 3016
B. 4016
C. 4316
D. 2716
E. None of the above
Answer Option A
30. Conversion of an octal number 1068 to binary number is
A. 11100102
B. 10001102
C. 11001102
D. 100001102
E. None of the above
Answer Option B
31. Conversion of binary number 1000112 to an octal number is
A. 438
B. 478
C. 498
D. 508
E. None of the above
Answer Option A
32. What table shows the electrical state of a digital circuit's output for every possible combination of electrical states in the inputs?
A. Function table
B. Truth table
C. Routing table
D. ASCII table
E. None of the above
Answer Option B
33. What is the hexadecimal equivalent of a binary number 10101111
A. AF
B. 9E
C. 8C
D. All of the above
E. None of the above
Answer Option A
34. The two basic technologies for digital ICs are bipolar and MOS. Bipolar technology is preferred for_____ and _____ whereas MOS technology is better suited to LSI.
A. SSI, MSI
B. MSI, LSI
C. SSI, LSI
D. ECL, DTL
E. None of the above
Answer Option A
35. Small-scale integration, abbreviated _____ refers to fewer than 12 gates on the same chip. Medium-scale integration (MSI) means 12 to 100 gates per chip. And large-scale integration (LSI) refers to more than _____ gates per chip.
A. SSI, 75
B. SSI, 100
C. SSI, 1000
D. SSI, 10000
E. None of the above
Answer Option B
36. How many outputs signals can a gate have?
A. one
B. more than one
C. two only
D. both (a) and (b)
E. None of the above
Answer Option A
37. Conversion of an octal number 1258 to its decimal number is
A. 9010
B. 8510
C. 8710
D. 9910
E. None of the above
Answer Option B
38. What is the main advantage of using MOSFET rather than bipolar transistor circuitary in ICs?
A. much greater complexity (more components) than bipolar circuits : better economy
B. higher operating speed than bipolar circuits
C. fewer power supply connections are required with MOS ICs
D. system designers are more familiar with MOS circuitary
Answer Option A
39. The term sum-of-products in boolean algebra means
A. The AND function of several OR functions
B. The OR function of several AND functions
C. The OR function of several OR functions
D. The AND function of several AND functions
E. None of the above
Answer Option B
40. A shift register can be used for:
A. parallel to serial conversion
B. serial to parallel conversion
C. digital delay line
D. all of the above
E. None of the above
Answer Option D
41. Names, numbers, and other information needed to solve a problem are called _____
A. program
B. instruction
C. data
D. controls
E. None of the above
Answer Option C
42. A typical microcomputer may have up to 65,536 registers in its memory. Each of these registers, usually called a _____
A. address
B. memory location
C. registers
D. chip
E. None of the above
Answer Option B
43. Conversion of binary number 100000000002 to decimal number is
A. 102410
B. 103410
C. 112410
D. 103710
E. None of the above
Answer Option A
44. Conversion of binary number 111112 to an octal number is
A. 358
B. 328
C. 378
D. 428
E. None of the above
Answer Option C
45. Conversion of binary number 1011102 to an octal number is
A. 358
B. 468
C. 568
D. 508
E. None of the above
Answer Option C
46. The hexadecimal number system is widely used in analyzing and programming ______
A. registers
B. chips
C. microprocessors
D. vacuum tube
E. None of the above
Answer Option C
47. A combinational logic circuit which is used to send data coming from a single source to two or more separate destinations is called as
A. decoder
B. encoder
C. multiplexer
D. demultiplexer
E. None of the above
Answer Option D
48. How many full and half-adders are required to add 16-bit numbers?
A. 8 half-adders, 8 full-adders
B. 1 half-adders, 15 full-adders
C. 16 half-adders, no full-adders
D. 4 half-adders, 12 full-adders
E. None of the above
Answer Option B
49. An odd-parity generator produces an odd-parity bit to go along with the data. The parity of the transmitted data is _____ An XOR gate can test each received word for parity rejecting words with _____ parity.
A. odd, even
B. high, low
C. low, high
D. even, odd
E. None of the above
Answer Option A
50. A gate is a logic circuit with one or more input signals but _____ output signal.
A. two
B. double
C. one
D. more than one
E. None of the above
Answer Option C
Comments
Post a Comment