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.

Because of their nonvolatility, high speed, low power requirements, and lack of moving parts, ________ have become feasible alternatives to magnetic disk storage.

A.
CD-ROMs
B.
flash memory modules
C.
ROMs
D.
EPROMs

Your Answer: Option (Not Answered)

Correct Answer: Option B

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2.

The difference between RAM and ROM is that ________.

A.
RAM has a read/write signal and ROM doesn't
B.
RAM will lose data when the power is removed and ROM won't
C.
RAM has random address access and ROM uses sequential address access
D.
RAM has a read/write signal and ROM doesn't; RAM will lose data when the power is removed and ROM won't.
E.
All of the above

Your Answer: Option (Not Answered)

Correct Answer: Option D

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3.

The circuit given below has no output on Q1 when examined with an oscilloscope. All J-K inputs are HIGH, the CLK signal is present, and the Q0 is toggling. The C input of FF1 is a constant LOW. What could be causing the problem?

A.
The Q0 output should be connected to the J input of FF1.
B.
The output of FF0 may be shorted to ground.
C.
The input of FF1 may be shorted to ground.
D.
Either the output of FF0 or the input of FF1 may be shorted to ground.

Your Answer: Option (Not Answered)

Correct Answer: Option D

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4.

Even-parity 01101000 binary is ________in hexadecimal.

A.
C816
B.
6816
C.
D016
D.
Nothing. Parity does not check.

Your Answer: Option (Not Answered)

Correct Answer: Option D

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5.

A device that selects one of several inputs to be placed on the output 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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6.

Schematic capture is a process performed by PLD software.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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7.

The binary subtraction 0 – 0 =

A.
difference = 0
borrow = 0
B.
difference = 1
borrow = 0
C.
difference = 1
borrow = 1
D.
difference = 0
borrow = 1

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Digital Arithmetic Operations and Circuits

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8.

The quantity represented by #1 in the given figure is ________.

A.
VH(max)
B.
VL(min)
C.
VH(min)
D.
VL(max)

Your Answer: Option (Not Answered)

Correct Answer: Option D

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9.

The data sheet for the 74 series of TTL ICs shows that Vcc has a range of 4.5 V to 5.5 V.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Integrated-Circuit Logic Families

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10.

Four subcategories of ASIC devices are available to create digital systems. These are PLDs, gate arrays, standard cells, and ________.

A.
HCPLDs
B.
full custom
C.
GAL
D.
FPLDs

Your Answer: Option (Not Answered)

Correct Answer: Option B

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11.

A breadboard-circuit design using a BCD-to-decimal decoder has a problem wherein the operation of the system is erratic. The technician uses his scope to examine the waveforms throughout the system and doesn't really see any problems. While he's scratching his head, what helpful advice can you offer him as to what might be wrong and what to do to correct the problem?

A.
The decoder is thermally intermittent; replace it.
B.
There is probably a bad connection on the wire wrap protoboard; recheck the wiring.
C.
Glitches are probably the culprit; strobe the decoder.
D.
The decoder is thermally intermittent and must be replaced; or there is probably a bad connection on the wire wrap protoboard, and the wiring must be rechecked.

Your Answer: Option (Not Answered)

Correct Answer: Option C

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12.

Which logic gate does this truth table describe?

A.
AND
B.
OR
C.
NAND
D.
NOR

Your Answer: Option (Not Answered)

Correct Answer: Option D

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13.

Boolean algebra was first applied to the analysis of digital circuits by Claude Shannon at Stanford University.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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14.

3C1D16 = 111100000111012

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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15.

Device pins XTAL1 and XTAL2 for the 8051 are used for connections to an external oscillator or crystal.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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16.

The most common TTL series ICs are:

A.
E-MOSFET
B.
7400
C.
quad
D.
AC00

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Logic Families and Their Characteristics

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17.

The representation of –110 in eight-bit two's-complement notation is 11110111.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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18.

The first microprocessor had a(n)________.

A.
1-bit data bus
B.
2-bit data bus
C.
4-bit data bus
D.
8-bit data bus

Your Answer: Option (Not Answered)

Correct Answer: Option C

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19.

The process by which a computer acquires digitized analog data is referred to as ________.

A.
data acquisition
B.
monotonicity
C.
analog resolution
D.
systematic digital conversion

Your Answer: Option (Not Answered)

Correct Answer: Option A

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20.

Two J-K flip-flops with their J-K inputs tied HIGH are cascaded to be used as counters. After four input clock pulses, the binary count is ________.

A.
00
B.
11
C.
01
D.
10

Your Answer: Option (Not Answered)

Correct Answer: Option A

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