9294 + Mcqs in Electronics and Communication Engineering Page 78 McqOptions

3851.	Consider the following features: negative operands cannot be usedwhen immediate operand changes, the program should be reassembledthe program is difficult to readthe size of operand is restricted by word length of the computer Disadvantages of immediate addressing include
A.	1 and 2
B.	2 and 4
C.	2 and 3
D.	1 and 4
Answer» C. 2 and 3

Discussion

3852.	In magnetic film memory, the memory element consits of
A.	plated wires
B.	superconductive material
C.	nickel iron alloy
D.	doped aluminium
Answer» D. doped aluminium

Discussion

3853.	Which device changes serial data to parallel data?
A.	Counter
B.	Multiplexer
C.	Demultiplexer
D.	Flip flop
Answer» D. Flip flop

Discussion

3854.	Which binary addition is incorrect?
A.	1101.1 + 1011.1 = 11001.0
B.	101101 + 1101101 + 1100011
C.	0.0011 + 0.1110 + 1.0001
D.	1100.001 + 1011.011 = 10111.100
Answer» E.

Discussion

3855.	CD4010 is a
A.	inverting buffer
B.	non-inverting hex buffer
C.	NOR IC
D.	NAND IC
Answer» C. NOR IC

Discussion

3856.	What is the terminal count in decimal form?
A.	1579
B.	1681
C.	1881
D.	2014
Answer» B. 1681

Discussion

3857.	In the generic microprocessor
A.	instruction cycle time period is shorter than machine cycle time period
B.	machine cycle time period is shorter than instruction cycle time period
C.	instruction cycle time period is exactly half of machine cycle time period
D.	instruction cycle time period is exactly equal to machine cycle time period
Answer» C. instruction cycle time period is exactly half of machine cycle time period

Discussion

3858.	In floating point representation, mantissa is expressed in
A.	excess 3 notation
B.	gray code
C.	excess 32 notation
D.	2's complement
Answer» D. 2's complement

Discussion

3859.	Which of the circuits in the given figure that converts JK flip flop to T flip flop?
A.	<img src="/_files/images/electronics-and-communication-engineering/digital-electronics/29-391-1.png">
B.	<img src="/_files/images/electronics-and-communication-engineering/digital-electronics/29-391-2.png">
C.	<img src="/_files/images/electronics-and-communication-engineering/digital-electronics/29-391-3.png">
D.	<img src="/_files/images/electronics-and-communication-engineering/digital-electronics/29-391-4.png">
Answer» B. <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/29-391-2.png">

Discussion

3860.	Consider the following registers: A accumulator and B registerB and C registersD and E registersH and L registers Which of these 8-bit registers of 8085 P can be paired together to make a 16-bit register?
A.	1, 3 and 4
B.	2, 3 and 4
C.	1 and 2
D.	1, 2 and 3
Answer» C. 1 and 2

Discussion

3861.	Access time of a storage is the time required
A.	to write one word into the memory
B.	to read one word from the memory
C.	to write one word into and to read one word from the memory
D.	either to write one word or to read one word
Answer» E.

Discussion

3862.	For a D/A converter, inputs and outputs are given. The output corresponding to digital input 01000
A.	2.0 V
B.	2.5 V
C.	3.0 V
D.	4.0 V
Answer» B. 2.5 V

Discussion

3863.	The fetching, decoding and executing of an instruction is broken down into several time intervals. Each of these intervals, involving one or more clock periods, is called a
A.	instruction cycle
B.	machine cycle
C.	process cycle
D.	none of the above
Answer» C. process cycle

Discussion

3864.	By placing an inverter between both inputs of an S-R flip-flop, the resulting flip-flop becomes
A.	J-K flip-flop
B.	D-flip-flop
C.	T-flip-flop
D.	Master salve JK flip-flop
Answer» C. T-flip-flop

Discussion

3865.	The output of the circuit shown below will be of the frequency
A.	125 Hz
B.	250 Hz
C.	500 Hz
D.	750 Hz
Answer» C. 500 Hz

Discussion

3866.	In the given figure Y =
A.	A
B.	B
C.	A + B + C
D.	ABC
Answer» C. A + B + C

Discussion

3867.	Assertion (A): An encoder converts key dips to binary code.Reason (R): An encoder has more inputs than output.
A.	Both A and R are correct and R is correct explanation of A
B.	Both A and R are correct but R is not correct explanation of A
C.	A is true, R is false
D.	A is false, R is true
Answer» C. A is true, R is false

Discussion

3868.	If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be
A.	32 GB
B.	16 GB
C.	32 MB
D.	16 MB
Answer» B. 16 GB

Discussion

3869.	In 8085 microprocessor, how many I/O ports can be accessed by direct method?
A.	8
B.	256
C.	32 K
D.	64 K
Answer» C. 32 K

Discussion

3870.	If the mantissa of a digital computer is 37 bit long then the accuracy of the digital computer will be of
A.	37 decimal places
B.	23 decimal places
C.	11 decimal places
D.	accuracy is independent of the length to mantissa
Answer» D. accuracy is independent of the length to mantissa

Discussion

3871.	Bipolar IC memories are fabricated using
A.	high density versions of the bipolar transistor flip-flop
B.	low density versions of the unipolar transistor flip-flop
C.	high density versions of the MOSFET
D.	low density versions of the MOSFET
Answer» B. low density versions of the unipolar transistor flip-flop

Discussion

3872.	A D-flip-flop is
A.	dial type flip-flop
B.	delay flip-flop
C.	differential flip-flop
D.	digital flip-flop
Answer» C. differential flip-flop

Discussion

3873.	Which of the following flip-flop do not have race problem?
A.	T flip-flop
B.	D flip-flop
C.	JK flip-flop
D.	Master-slave flip-flop
Answer» E.

Discussion

3874.	It is desired to route data from many registers to one register. The device needed is
A.	decoder
B.	multiplexer
C.	demultiplexer
D.	counter
Answer» C. demultiplexer

Discussion

3875.	Advanced low power Schottky is a part of
A.	ECL family
B.	CMOS family
C.	TTL family
D.	none of the above
Answer» D. none of the above

Discussion

3876.	A device that converts from decimal to binary numbered is called
A.	decoder
B.	encoder
C.	CPU
D.	converter
Answer» C. CPU

Discussion

3877.	It is desired to clean up ragged looking pulsed that have been distorted during transmission from one place to another, which of the following device will be appropriate?
A.	Multiplexer
B.	D/A converter
C.	JK flip-flop
D.	Schmitt trigger
Answer» E.

Discussion

3878.	Decimal number 9 in gray code =
A.	1100
B.	1101
C.	110
D.	1111
Answer» C. 110

Discussion

3879.	Binary number 11011.01 when converted to its 2's complement will become
A.	0101.110
B.	01111.10
C.	01100.10
D.	00100.11
Answer» E.

Discussion

3880.	Decimal 45.15 when converted into 9's complement will become
A.	54.84
B.	45.48
C.	48.54
D.	45.84
Answer» B. 45.48

Discussion

3881.	A five bit binary adder is used to add 01001 and 00111. The adders from LSB position are numbered as FA0, FA1, FA2 and FA3. The outputs of FA2 are
A.	SUM = 0
B.	SUM = 0, CARRY = 1
C.	SUM = 1, CARRY = 0
D.	SUM = 1, CARRY = 1
Answer» B. SUM = 0, CARRY = 1

Discussion

3882.	figure shows a NAND latch used as a switch debouncer. With the switch in STOP position. Q will be equal to
A.	0
B.	1
C.	CLK
D.	none of these
Answer» B. 1

Discussion

3883.	As compared to MOS memories, bipolar memories have
A.	slower access time but are cheaper
B.	slower access time and are costly
C.	faster access time and are cheaper
D.	faster access time and are costly
Answer» E.

Discussion

3884.	The hexadecimal number BBC7 is equivalent to decimal number
A.	49761
B.	46791
C.	47691
D.	49761
Answer» C. 47691

Discussion

3885.	In 8085, out of interrupts given below, one particular interrupts is quite different from others, This interrupt is
A.	RST 5.5
B.	RST 6.5
C.	RST 7.5
D.	none of these
Answer» D. none of these

Discussion

3886.	An A/D converter uses for reference purposes
A.	DC voltage
B.	a saw tooth generator
C.	set of keys
D.	a flip-flop
Answer» C. set of keys

Discussion

3887.	A seven bit (even parity) code 0010001 may have error. The correct code is
A.	0010001
B.	1110001
C.	0011001
D.	1111110
Answer» D. 1111110

Discussion

3888.	Which of the following represents the decimal form of binary 0.0111?
A.	0.1600
B.	0.22728
C.	0.9375
D.	0.7964
Answer» D. 0.7964

Discussion

3889.	Which one of the following is loaded in the main memory by the bootstrap loader?
A.	System data
B.	User program
C.	BIOS
D.	Part of DOS
Answer» E.

Discussion

3890.	Microprocessors find applications in
A.	pocket calculators
B.	scientific instruments
C.	medical equipments
D.	all of the above
Answer» E.

Discussion

3891.	If we need a device to shut off a few ampere current in a few nano seconds, the proper devices is
A.	VMOS
B.	CMOS
C.	BJT
D.	UJT
Answer» B. CMOS

Discussion

3892.	A semiconductor Read-only-Memory basically is
A.	a combinational logic circuit
B.	a set of flip-flop memory elements
C.	a sequential circuit with flip-flops and gates
D.	none of the above
Answer» B. a set of flip-flop memory elements

Discussion

3893.	Assertion (A): A binary number is a string of zeros and ones only Reason (R): The base in a binary system is 2
A.	Both A and R are correct and R is correct explanation of A
B.	Both A and R are correct but R is not correct explanation of A
C.	A is true, R is false
D.	A is false, R is true
Answer» B. Both A and R are correct but R is not correct explanation of A

Discussion

3894.	Symbol in the given figure is IEEE symbol for
A.	AND
B.	OR
C.	NAND
D.	NOR
Answer» C. NAND

Discussion

3895.	For a level input sequential circuit
A.	output in a level only
B.	output is in the pulse form
C.	output may be a pulse or a level form
D.	none of these
Answer» B. output is in the pulse form

Discussion

3896.	In a digital system, the maximum clock frequency that can be used with Master/Slave Clocked flip-flops having total propagation delay of 200 sec is
A.	20 MHz
B.	50 MHz
C.	100 MHz
D.	200 MHz
Answer» C. 100 MHz

Discussion

3897.	Which of them contains an organic fluid?
A.	LED
B.	LCD
C.	Both LED and LCD
D.	Neither LED nor LCD
Answer» C. Both LED and LCD

Discussion

3898.	A buffer is
A.	always non-inverting
B.	always inverting
C.	inverting or non-inverting
D.	none of the above
Answer» D. none of the above

Discussion

3899.	The circuit realizes the function
A.	(A + B) E + CD
B.	(A + B) (E + CD)
C.	(A + B) (E + C + D)
D.	(AB + E). CD
Answer» B. (A + B) (E + CD)

Discussion

3900.	A voltage DAC is generally slower than current DAC
A.	because of more accuracy
B.	because of higher resolution
C.	because of response time of op-amp current to voltage converter
D.	none of the above
Answer» D. none of the above

Discussion

Explore topic-wise MCQs in Engineering.

Consider the following features: negative operands cannot be usedwhen immediate operand changes, the program should be reassembledthe program is difficult to readthe size of operand is restricted by word length of the computer Disadvantages of immediate addressing include

In magnetic film memory, the memory element consits of

Which device changes serial data to parallel data?

Which binary addition is incorrect?

CD4010 is a

What is the terminal count in decimal form?

In the generic microprocessor

In floating point representation, mantissa is expressed in

Which of the circuits in the given figure that converts JK flip flop to T flip flop?

Consider the following registers: A accumulator and B registerB and C registersD and E registersH and L registers Which of these 8-bit registers of 8085 P can be paired together to make a 16-bit register?

Access time of a storage is the time required

For a D/A converter, inputs and outputs are given. The output corresponding to digital input 01000

The fetching, decoding and executing of an instruction is broken down into several time intervals. Each of these intervals, involving one or more clock periods, is called a

By placing an inverter between both inputs of an S-R flip-flop, the resulting flip-flop becomes

The output of the circuit shown below will be of the frequency

In the given figure Y =

Assertion (A): An encoder converts key dips to binary code.Reason (R): An encoder has more inputs than output.

If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be

In 8085 microprocessor, how many I/O ports can be accessed by direct method?

If the mantissa of a digital computer is 37 bit long then the accuracy of the digital computer will be of

Bipolar IC memories are fabricated using

A D-flip-flop is

Which of the following flip-flop do not have race problem?

It is desired to route data from many registers to one register. The device needed is

Advanced low power Schottky is a part of

A device that converts from decimal to binary numbered is called

It is desired to clean up ragged looking pulsed that have been distorted during transmission from one place to another, which of the following device will be appropriate?

Decimal number 9 in gray code =

Binary number 11011.01 when converted to its 2's complement will become

Decimal 45.15 when converted into 9's complement will become

A five bit binary adder is used to add 01001 and 00111. The adders from LSB position are numbered as FA0, FA1, FA2 and FA3. The outputs of FA2 are

figure shows a NAND latch used as a switch debouncer. With the switch in STOP position. Q will be equal to

As compared to MOS memories, bipolar memories have

The hexadecimal number BBC7 is equivalent to decimal number

In 8085, out of interrupts given below, one particular interrupts is quite different from others, This interrupt is

An A/D converter uses for reference purposes

A seven bit (even parity) code 0010001 may have error. The correct code is

Which of the following represents the decimal form of binary 0.0111?

Which one of the following is loaded in the main memory by the bootstrap loader?

Microprocessors find applications in

If we need a device to shut off a few ampere current in a few nano seconds, the proper devices is

A semiconductor Read-only-Memory basically is

Assertion (A): A binary number is a string of zeros and ones only Reason (R): The base in a binary system is 2

Symbol in the given figure is IEEE symbol for

For a level input sequential circuit

In a digital system, the maximum clock frequency that can be used with Master/Slave Clocked flip-flops having total propagation delay of 200 sec is

Which of them contains an organic fluid?

A buffer is

The circuit realizes the function

A voltage DAC is generally slower than current DAC