2291 + Mcqs in Digital Electronics McqOptions

1.	The digit that changes most often when counting is called the ________.
A.	LSB
B.	LL Bean
C.	LED
D.	LCD
Answer» B. LL Bean

Discussion

2.	Memory devices that use electronic latching circuits are called ________.
A.	RAM
B.	flip-flops
C.	magnetic tape
D.	DRAM
Answer» C. magnetic tape

Discussion

3.	The manner in which a digital circuit responds to an input is the circuit's ________.
A.	logic
B.	wiring
C.	inputs
D.	outputs
Answer» B. wiring

Discussion

4.	A microprocessor that performs only specific, dedicated tasks is also called a ________.
A.	microcontroller
B.	calculator
C.	laptop microrocmputer
D.	workstation processor
Answer» B. calculator

Discussion

5.	The decimal system is composed of ________ symbols.
A.	2
B.	8
C.	10
D.	16
Answer» D. 16

Discussion

6.	If a HIGH logic level is assigned a binary zero (0), and a low level is assigned a binary one (1), the logic is called ________.
A.	negative logic
B.	positive logic
C.	invalid logic
D.	assertion-level logic
Answer» B. positive logic

Discussion

7.	A(n)________ is not a functional unit of a computer.
A.	input unit
B.	memory unit
C.	modem
D.	control unit
Answer» D. control unit

Discussion

8.	Other ________ are often used to interpret or represent binary quantities for the convenience of the people who work with and use these digital systems.
A.	analog systems
B.	digital systems
C.	number systems
D.	binary systems
Answer» D. binary systems

Discussion

9.	In a positive logic system, the HIGH level is usually represented by ________.
A.	0 V
B.	+1 V
C.	+5 V
D.	+9 V
Answer» D. +9 V

Discussion

10.	A set of instructions for a computer is called a(n) ________.
A.	instruction manual
B.	logic unit
C.	program
D.	diagram
Answer» D. diagram

Discussion

11.	The set of instructions for a computer is called a(n) ________.
A.	program
B.	input
C.	output
D.	control unit
Answer» B. input

Discussion

12.	The value of the data shown in the given figure is ________.
A.	between 0 and 1
B.	1011001
C.	5
D.	1001101
Answer» C. 5

Discussion

13.	To determine which of two binary numbers is larger, you could use a(n) ________.
A.	register
B.	adder
C.	encoder
D.	magnitude comparator
Answer» E.

Discussion

14.	In ________ transmission, a single conductor is used.
A.	digital
B.	automatic
C.	serial
D.	binary
Answer» D. binary

Discussion

15.	The CPU (Central Processing Unit) is composed of memory and outputs.
A.	True
B.	False
Answer» C.

Discussion

16.	PALs are relatively simple integrated circuit devices.
A.	True
B.	False
Answer» B. False

Discussion

17.	A device to convert a binary number to a 7-segment display format is a decoder.
A.	True
B.	False
Answer» B. False

Discussion

18.	The two binary digits are 1 and 2.
A.	True
B.	False
Answer» C.

Discussion

19.	A logic analyzer is used to display a timing diagram.
A.	True
B.	False
Answer» B. False

Discussion

20.	With an AND gate, if one input is HIGH, the output reflects the other input.
A.	True
B.	False
Answer» B. False

Discussion

21.	Parallel transmission is faster than serial.
A.	True
B.	False
Answer» B. False

Discussion

22.	A microcomputer is the smallest type of computer.
A.	True
B.	False
Answer» B. False

Discussion

23.	In a negative logic system, a high is represented by 0.
A.	True
B.	False
Answer» B. False

Discussion

24.	The LSB is always to the right of the MSB.
A.	True
B.	False
Answer» B. False

Discussion

25.	A digital circuit will not obey a set of logic rules.
A.	True
B.	False
Answer» C.

Discussion

26.	Circuits that exhibit the property of memory normally revert to their original state when the input is removed.
A.	True
B.	False
Answer» C.

Discussion

27.	The ________ number system has a base of sixteen.
A.	Johnson
B.	hexadecimal
C.	binary
D.	octal
Answer» C. binary

Discussion

28.	The decimal equivalent of the BCD number 1010 is ________.
A.	8
B.	10
C.	12
D.	invalid
Answer» E.

Discussion

29.	The largest unsigned decimal number that can be represented in binary using six bits is ________.
A.	63
B.	64
C.	127
D.	128
Answer» B. 64

Discussion

30.	Whenever information is transmitted from one device to another, there is a possibility that ________.
A.	one device is off
B.	errors will occur
C.	there is a full moon
D.	the data will be received as transmitted
Answer» C. there is a full moon

Discussion

31.	Odd-parity 9E16 is ________ decimal.
A.	30
B.	158
C.	78
D.	Nothing. Parity does not check.
Answer» B. 158

Discussion

32.	Hexadecimal 12 is ________in binary.
A.	00010111
B.	00010100
C.	00010010
D.	00100001
Answer» D. 00100001

Discussion

33.	Overflow can occur if two signed numbers are added and ________.
A.	they have opposite signs
B.	they have the same sign
C.	both of the above
D.	none of the above
Answer» C. both of the above

Discussion

34.	Transistor-transistor logic (TTL) uses the bipolar transistor as its main circuit element.
A.	True
B.	False
Answer» B. False

Discussion

35.	A digital quantity has a discrete set of values.
A.	True
B.	False
Answer» B. False

Discussion

36.	Most computers store data in strings of ________ bits called a ________.
A.	8, word
B.	8, byte
C.	16, word
D.	16, byte
Answer» C. 16, word

Discussion

37.	A complete alphanumeric code would include 26 lowercase letters, 26 uppercase letters, 10 numeric digits, 7 punctuation marks, and anywhere from ________ to ________ other characters.
A.	5, 10
B.	10, 15
C.	10, 20
D.	20, 40
Answer» E.

Discussion

38.	Hex 4B5258 is ________ in ASCII code.
A.	FGM
B.	KLM
C.	KRX
D.	JQW
Answer» D. JQW

Discussion

39.	The ________ code represents alphanumeric characters as seven-bit binary numbers.
A.	ASCII
B.	octal
C.	alphanumeric
D.	Boy Scout
Answer» B. octal

Discussion

40.	A type of shift register in which the Q or Q output of one stage is not connected to the input of the next stage is ________.
A.	parallel in/serial out
B.	serial in/parallel out
C.	serial in/serial out
D.	parallel in/parallel out
Answer» E.

Discussion

41.	Assume a LOW logic level is placed on the SHIFT/LOAD input of a 74195 shift register. The output will change ________.
A.	immediately
B.	if the CLOCK is also LOW
C.	on the next clock leading edge
D.	depending on the J and K inputs
Answer» D. depending on the J and K inputs

Discussion

42.	One of the stages in a register consists of a latch.
A.	True
B.	False
Answer» B. False

Discussion

43.	There are several ways to construct a stepper motor to achieve digitally controlled stepping action. One possibility is to construct four stator coils set up as four pole pairs, each 45 apart and using three ferromagnetic pairs spaced 60 apart.
A.	True
B.	False
Answer» B. False

Discussion

44.	A parallel load operation is asynchronous, so it is not dependent on the clock.
A.	True
B.	False
Answer» B. False

Discussion

45.	A ferromagnetic material is one that forms a resistance to magnetic fields.
A.	True
B.	False
Answer» C.

Discussion

46.	The Boolean expression (A + B)(C + D) is an example of ________.
A.	LAB
B.	LUT
C.	SOP
D.	POS
Answer» E.

Discussion

47.	A counter has a specified sequence of states, but a shift register does not.
A.	True
B.	False
Answer» B. False

Discussion

48.	A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmer interconnect that is used to connect internal logic modules is called a ________.
A.	bed-of-nails
B.	boundary scan
C.	CLB
D.	CPLD
Answer» D. CPLD

Discussion

49.	In a FLEX10K device, the carry chain provides a fast carry forward function between ________.
A.	LUTs
B.	EABs
C.	LEs
D.	LABs
Answer» D. LABs

Discussion

50.	An Altera FLEX10K device uses a(n) ________ architecture.
A.	OR array
B.	AND array
C.	OR and AND array
D.	look-up table
Answer» E.

Discussion

Explore topic-wise MCQs in Testing Subject.

The digit that changes most often when counting is called the ________.

Memory devices that use electronic latching circuits are called ________.

The manner in which a digital circuit responds to an input is the circuit's ________.

A microprocessor that performs only specific, dedicated tasks is also called a ________.

The decimal system is composed of ________ symbols.

If a HIGH logic level is assigned a binary zero (0), and a low level is assigned a binary one (1), the logic is called ________.

A(n)________ is not a functional unit of a computer.

Other ________ are often used to interpret or represent binary quantities for the convenience of the people who work with and use these digital systems.

In a positive logic system, the HIGH level is usually represented by ________.

A set of instructions for a computer is called a(n) ________.

The set of instructions for a computer is called a(n) ________.

The value of the data shown in the given figure is ________.

To determine which of two binary numbers is larger, you could use a(n) ________.

In ________ transmission, a single conductor is used.

The CPU (Central Processing Unit) is composed of memory and outputs.

PALs are relatively simple integrated circuit devices.

A device to convert a binary number to a 7-segment display format is a decoder.

The two binary digits are 1 and 2.

A logic analyzer is used to display a timing diagram.

With an AND gate, if one input is HIGH, the output reflects the other input.

Parallel transmission is faster than serial.

A microcomputer is the smallest type of computer.

In a negative logic system, a high is represented by 0.

The LSB is always to the right of the MSB.

A digital circuit will not obey a set of logic rules.

Circuits that exhibit the property of memory normally revert to their original state when the input is removed.

The ________ number system has a base of sixteen.

The decimal equivalent of the BCD number 1010 is ________.

The largest unsigned decimal number that can be represented in binary using six bits is ________.

Whenever information is transmitted from one device to another, there is a possibility that ________.

Odd-parity 9E16 is ________ decimal.

Hexadecimal 12 is ________in binary.

Overflow can occur if two signed numbers are added and ________.

Transistor-transistor logic (TTL) uses the bipolar transistor as its main circuit element.

A digital quantity has a discrete set of values.

Most computers store data in strings of ________ bits called a ________.

A complete alphanumeric code would include 26 lowercase letters, 26 uppercase letters, 10 numeric digits, 7 punctuation marks, and anywhere from ________ to ________ other characters.

Hex 4B5258 is ________ in ASCII code.

The ________ code represents alphanumeric characters as seven-bit binary numbers.

A type of shift register in which the Q or Q output of one stage is not connected to the input of the next stage is ________.

Assume a LOW logic level is placed on the SHIFT/LOAD input of a 74195 shift register. The output will change ________.

One of the stages in a register consists of a latch.

There are several ways to construct a stepper motor to achieve digitally controlled stepping action. One possibility is to construct four stator coils set up as four pole pairs, each 45 apart and using three ferromagnetic pairs spaced 60 apart.

A parallel load operation is asynchronous, so it is not dependent on the clock.

A ferromagnetic material is one that forms a resistance to magnetic fields.

The Boolean expression (A + B)(C + D) is an example of ________.

A counter has a specified sequence of states, but a shift register does not.

A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmer interconnect that is used to connect internal logic modules is called a ________.

In a FLEX10K device, the carry chain provides a fast carry forward function between ________.

An Altera FLEX10K device uses a(n) ________ architecture.

Most computers store data in strings of bits called a .

A complete alphanumeric code would include 26 lowercase letters, 26 uppercase letters, 10 numeric digits, 7 punctuation marks, and anywhere from to other characters.