Online Digital Electronics Test - Digital Electronics Test - Random



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Instruction:

  • This is a FREE online test. DO NOT pay money to anyone to attend this test.
  • Total number of questions : 20.
  • Time alloted : 30 minutes.
  • Each question carry 1 mark, no negative marks.
  • DO NOT refresh the page.
  • All the best :-).


1.

Main computer memory is usually DRAM because of its high density and low cost; cache memory is usually SRAM because of its high speed.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Memory and Storage

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2.

Static memory will maintain storage even if power is removed.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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3.

The 8085A is a(n):

A.
16-bit parallel CPU
B.
8-bit serial CPU
C.
8-bit parallel CPU
D.
none of the above

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Microprocessor Fundamentals

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4.

The inputs/outputs of an analog multiplexer/demultiplexer are:

A.
bidirectional
B.
unidirectional
C.
even parity
D.
binary-coded decimal

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Code Converters and Multiplexers

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5.

A decoder can be used as a demultiplexer by ________.

A.
tying all enable pins LOW
B.
tying all data-select lines LOW
C.
tying all data-select lines HIGH
D.
using the input lines for data selection and an enable line for data input

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Combinational Logic Circuits

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6.

Which of the following expressions is in the sum-of-products form?

A.
(A + B)(C + D)
B.
(AB)(CD)
C.
AB(CD)
D.
AB + CD

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Combinational Logic Circuits

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7.

In VHDL, when we want to remember a value it must be stored in a VARIABLE.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Counters

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8.

The base of the hexadecimal system is:

A.
eight.
B.
sixteen.
C.
ten.
D.
two.

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Number Systems and Codes

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9.

Using 4-bit adders to create a 1See Section 6-bit adder:

A.
requires 16 adders.
B.
requires 4 adders.
C.
requires the carry-out of the less significant adder to be connected to the carry-in of the next significant adder.
D.
requires 4 adders and the connection of the carry out of the less significant adder to the carry-in of the next significant adder.

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Digital Arithmetic Operations and Circuits

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10.

For the given circuit, which of the following is correct?

A.
The number 5 is being written to the memory at address location 203.
B.
The chip has not been enabled, since the EN terminal is 0; therefore, nothing will be written to the chip and the output is tri-stated.
C.
Decimal 10 is being written into memory location 211.
D.
The read/write line is LOW; therefore, decimal 5 is being stored at memory location 211.

Your Answer: Option (Not Answered)

Correct Answer: Option C

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11.

Which of the symbols shown below represents an AND gate?

A.
a
B.
b
C.
c
D.
d

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Describing Logic Circuits

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12.

A ________ is a testing and troubleshooting tool that generates a short-duration pulse when manually activated, usually by depressing a push button.

A.
cattle prod
B.
jimmy rod
C.
logic pulser
D.
bilateral switch

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Integrated-Circuit Logic Families

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13.

In the frequency counter, the pulse width of the enable signal is very critical for taking an accurate frequency measurement.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Digital System Projects Using HDL

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14.

Design costs for standard cell ASICs are ________ those for MPGAs.

A.
lower than
B.
about the same as
C.
higher than
D.
none of the above

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Programmable Logic Device

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15.

The field programmable logic array was the first ________ programmable logic device.

A.
understandable
B.
logic array
C.
multifunction
D.
nonmemory

Your Answer: Option (Not Answered)

Correct Answer: Option D

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16.

What gives a GAL its flexibility?

A.
Its speed
B.
Its reprogrammable EPROM
C.
Its large logic arrays
D.
Its programmable OLMCs

Your Answer: Option (Not Answered)

Correct Answer: Option D

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17.

Why are the S and R inputs of a gated flip-flop said to be synchronous?

A.
They must occur with the gate.
B.
They occur independent of the gate.

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Flip-Flops

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18.

Master-slave J-K flip-flops are called pulse-triggered or level-triggered devices because input data is read during the entire time the clock pulse is at a LOW level.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Flip-Flops

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19.

Is the transistor in the given figure considered ON or OFF?

A.
OFF
B.
ON
C.
Not enough information is provided.

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Signals and Switches

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20.

The device that is an application of SOP logic is a multiplexer.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : MSI Logic Circuits

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