The clock signals are used in sequential logic circuits

to tell how much time has elapsed since the system was turned on

to synchronize events in various parts of a system

Cyclic codes are used in

arithmetic and logical computation

continuously varying signal representation

arithmetic and logical computation

Semiconductor memory is:

somewhat larger than the magnetic core memory

somewhat slower than magnetic core memory

somewhat larger than the magnetic core memory

Why are digital circuits easier to design than analog circuits?

they are made in the form of ICs

they do not control electricity precisely over a wide range

they are made in the form of ICs

all elements of digital circuit are from the same family

What is the main advantage of using MOSFET rather than bipolar transistor circuitary in ICs?

higher operating speed than bipolar circuits

much greater complexity (more components) than bipolar circuits : better economy

higher operating speed than bipolar circuits

fewer power supply connections are required with MOS ICs

system designers are more familiar with MOS circuitary

287 + Mcqs in Digital Computer Electronics in Computer Science Page 2 McqOptions

51.	Conversion of an octal number 47 to its binary number is
A.	110011
B.	100111
C.	110011
D.	1111011
E.	None of the above
Answer» C. 110011

Discussion

52.	Conversion of an octal number 3137 to it's decimal equivalent is
A.	1631
B.	1632
C.	1531
D.	1931
E.	None of the above
Answer» B. 1632

Discussion

53.	Conversion of an octal number 73 to binary number is
A.	110111
B.	111100
C.	110010
D.	111011
E.	None of the above
Answer» E. None of the above

Discussion

54.	Conversion of binary number 1100001 to hexadecimal is
A.	57
B.	61
C.	51
D.	43
E.	None of the above
Answer» C. 51

Discussion

55.	Conversion of an octal number 125 to its decimal number is
A.	90
B.	85
C.	87
D.	99
E.	None of the above
Answer» C. 87

Discussion

56.	Conversion of an octal number 110 to its decimal number is
A.	70
B.	72
C.	73
D.	110
E.	None of the above
Answer» C. 73

Discussion

57.	Conversion of hexadecimal number 1D7F to a decimal number is
A.	7551
B.	8771
C.	5557
D.	7781
E.	None of the above
Answer» B. 8771

Discussion

58.	Conversionofahexadecimal number 6316 to binary number is
A.	1001112
B.	1000112
C.	110112
D.	1001112
E.	one of the above
Answer» C. 110112

Discussion

59.	Conversionofbinarynumber 11000112 to its decimal number is
A.	910
B.	710
C.	910
D.	310
E.	one of the above
Answer» D. 310

Discussion

60.	Conversionofbinarynumber 10010102 to to its decimal number is
A.	410
B.	710
C.	210
D.	310
E.	one of the above
Answer» B. 710

Discussion

61.	Conversionofbinarynumber 10010012 to hexadecimal is
A.	016
B.	916
C.	916
D.	216
E.	one of the above
Answer» D. 216

Discussion

62.	Digitaldesignoftenstartsby constructing a _____ table.
A.	tandard
B.	wo-stage
C.	ruth
D.	wo-dinensional
E.	one of the above
Answer» D. wo-dinensional

Discussion

63.	Conversion of decimal number 8910 it's binary number equivalent is
A.	10110112
B.	11001112
C.	10110012
D.	100112
Answer» D. 100112

Discussion

64.	The clock signals are used in sequential logic circuits
A.	to tell the time of the day
B.	to tell how much time has elapsed since the system was turned on
C.	to carry serial data signals
D.	to synchronize events in various parts of a system
Answer» E.

Discussion

65.	What is the 1's complement of 0000 1111 0010 1101 number?
A.	1111 0000 0010 1101
B.	1111 0000 1101 0010
C.	1111 1100 1010 1100
D.	1001 0010 1010 1100
Answer» C. 1111 1100 1010 1100

Discussion

66.	A full-adder adds _____ bits, and producing a SUM and a _____
A.	8, SUBTRACTION
B.	3, CARRY
C.	16, DIVIDE
D.	All of the above
Answer» C. 16, DIVIDE

Discussion

67.	An XOR gate recognizes only words with an _____ number of 1's.
A.	even
B.	odd
C.	different
D.	All of the above
Answer» C. different

Discussion

68.	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
Answer» D. more than one

Discussion

69.	Cyclic codes are used in
A.	data transfer
B.	continuously varying signal representation
C.	arithmetic and logical computation
D.	All of the above
Answer» C. arithmetic and logical computation

Discussion

70.	Semiconductor memory is:
A.	somewhat slower than magnetic core memory
B.	a volatile memory
C.	somewhat larger than the magnetic core memory
D.	All of the above
Answer» C. somewhat larger than the magnetic core memory

Discussion

71.	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
Answer» D. 0's or 1's

Discussion

72.	A demultiplexer is also known as
A.	data selector
B.	data distributor
C.	multiplexer
D.	encoder
Answer» C. multiplexer

Discussion

73.	Addition of 1101012 and 1011112 is
A.	11001002
B.	11010002
C.	11101112
D.	1100112
Answer» B. 11010002

Discussion

74.	Why are digital circuits easier to design than analog circuits?
A.	they do not control electricity precisely over a wide range
B.	they are made in the form of ICs
C.	all elements of digital circuit are from the same family
D.	they are smaller in size
Answer» B. they are made in the form of ICs

Discussion

75.	In which of the following adder circuits, the carry look ripple delay is eliminated?
A.	Half adder
B.	Full adder
C.	Parallel adder
D.	Carry-look-ahead adder
Answer» E.

Discussion

76.	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
Answer» D. negative, positive

Discussion

77.	A microcomputer is a computer that uses a _____ for its CPU.
A.	chips
B.	registers
C.	microprocessor
D.	vacuum tube
Answer» D. vacuum tube

Discussion

78.	Conversion of hexadecimal number 93FA16 to it's binary number equivalent is
A.	10010000000000000
B.	100100000000000000
C.	1100110000000000
D.	1111100000000
Answer» B. 100100000000000000

Discussion

79.	For what logic gate the outputs in complement of the input?
A.	NOT
B.	AND
C.	OR
D.	XOR
Answer» B. AND

Discussion

80.	Division of 1000112 by 1012 is
A.	1002
B.	1112
C.	1012
D.	10102
Answer» C. 1012

Discussion

81.	A flip-flop can store
A.	one bit of data
B.	two bits of data
C.	three bits of data
D.	any number of bits of data
Answer» B. two bits of data

Discussion

82.	Computer ICs work reliably because they are based on _____ design.
A.	Top-bottom
B.	System
C.	Two-stage
D.	Two-states
Answer» E.

Discussion

83.	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
Answer» B. MSI, LSI

Discussion

84.	Conversion of decimal number 9310 to hexadecimal number is
A.	2D16
B.	5D16
C.	6216
D.	3116
Answer» C. 6216

Discussion

85.	A half-adder is also known as:
A.	AND circuit
B.	NAND circuit
C.	NOR circuit
D.	EX-OR circuit
Answer» E.

Discussion

86.	What logic function is obtained by adding an inverter to the output of an AND gate?
A.	OR
B.	NAND
C.	XOR
D.	NOR
Answer» C. XOR

Discussion

87.	How many full adders are required to construct an m- bit parallel adder?
A.	m/2
B.	m-1
C.	m
D.	m+1
Answer» D. m+1

Discussion

88.	FETs are used in linear ICs to:
A.	increase input resistance
B.	provide large resistances
C.	increase device complexity
D.	(a) and (b) above
Answer» E.

Discussion

89.	Conversion of decimal number 9910 to it's octal number equivalent is
A.	1218
B.	1438
C.	1248
D.	1198
Answer» C. 1248

Discussion

90.	The OR gate has two or more input signals. If any input is _____ the output is high.
A.	low
B.	high
C.	0
D.	All of the above
Answer» C. 0

Discussion

91.	The 1's compliment of binary number 11010 is:
A.	101
B.	10
C.	110
D.	11101
Answer» B. 10

Discussion

92.	A byte is consist of _____ bits
A.	two
B.	four
C.	eight
D.	ten
Answer» D. ten

Discussion

93.	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
Answer» C. Routing table

Discussion

94.	Conversion of an octal number 74328 to a binary number is
A.	11110000000000
B.	1111000000000
C.	1100110000000
D.	1111110000000
Answer» C. 1100110000000

Discussion

95.	The NOR gate is logically equivalent to an OR gate followed by an _____
A.	AND
B.	XAND
C.	XOR
D.	inverter
Answer» E.

Discussion

96.	A multiplexer is also known as
A.	coder
B.	decoder
C.	data selector
D.	multivibrator
Answer» D. multivibrator

Discussion

97.	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» B. higher operating speed than bipolar circuits

Discussion

98.	Conversion of an octal number 1258 to its decimal number is
A.	9010
B.	8510
C.	8710
D.	9910
Answer» C. 8710

Discussion

99.	A preliminary guide for comparing the simplicity of logic circuits is to count the number of input _____ leads.
A.	wire
B.	bus
C.	gate
D.	All of the above
Answer» D. All of the above

Discussion

100.	An AND gate has 7 inputs. How many input word are in its truth table?
A.	64
B.	32
C.	16
D.	128
Answer» E.

Discussion

Explore topic-wise MCQs in Computer Science.

Conversion of an octal number 47 to its binary number is

Conversion of an octal number 3137 to it's decimal equivalent is

Conversion of an octal number 73 to binary number is

Conversion of binary number 1100001 to hexadecimal is

Conversion of an octal number 125 to its decimal number is

Conversion of an octal number 110 to its decimal number is

Conversion of hexadecimal number 1D7F to a decimal number is

Conversionofahexadecimal number 6316 to binary number is

Conversionofbinarynumber 11000112 to its decimal number is

Conversionofbinarynumber 10010102 to to its decimal number is

Conversionofbinarynumber 10010012 to hexadecimal is

Digitaldesignoftenstartsby constructing a _____ table.

Conversion of decimal number 8910 it's binary number equivalent is

The clock signals are used in sequential logic circuits

What is the 1's complement of 0000 1111 0010 1101 number?

A full-adder adds _____ bits, and producing a SUM and a _____

An XOR gate recognizes only words with an _____ number of 1's.

A gate is a logic circuit with one or more input signals but _____ output signal.

Cyclic codes are used in

Semiconductor memory is:

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

A demultiplexer is also known as

Addition of 1101012 and 1011112 is

Why are digital circuits easier to design than analog circuits?

In which of the following adder circuits, the carry look ripple delay is eliminated?

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

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

For what logic gate the outputs in complement of the input?

Division of 1000112 by 1012 is

A flip-flop can store

Computer ICs work reliably because they are based on _____ design.

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.

Conversion of decimal number 9310 to hexadecimal number is

A half-adder is also known as:

What logic function is obtained by adding an inverter to the output of an AND gate?

How many full adders are required to construct an m- bit parallel adder?

FETs are used in linear ICs to:

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

The OR gate has two or more input signals. If any input is _____ the output is high.

The 1's compliment of binary number 11010 is:

A byte is consist of _____ bits

What table shows the electrical state of a digital circuit's output for every possible combination of electrical states in the inputs?

Conversion of an octal number 74328 to a binary number is

The NOR gate is logically equivalent to an OR gate followed by an _____

A multiplexer is also known as

What is the main advantage of using MOSFET rather than bipolar transistor circuitary in ICs?

Conversion of an octal number 1258 to its decimal number is

A preliminary guide for comparing the simplicity of logic circuits is to count the number of input _____ leads.

An AND gate has 7 inputs. How many input word are in its truth table?

A full-adder adds _ bits, and producing a SUM and a _

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.

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.