Online Digital Electronics Test - Digital Electronics Test 2



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Instruction:

  • 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.

How many binary bits are necessary to represent 748 different numbers?

A.
9
B.
7
C.
10
D.
8

Your Answer: Option (Not Answered)

Correct Answer: Option C

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2.

SMT stands for small-to-medium technology.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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3.

The systems shown in the given figure transfer data ________.

A.
serially
B.
sequentially
C.
in parallel
D.
both serially and sequentially

Your Answer: Option (Not Answered)

Correct Answer: Option D

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4.

Convert binary 11001111 to hexadecimal.

A.
8F16
B.
CE16
C.
DF16
D.
CF16

Your Answer: Option (Not Answered)

Correct Answer: Option D

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5.

Zeros may be added to the left of the MSB to produce even groups of 4 bits when converting from binary to hexadecimal.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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6.

In binary, the decimal number 93 converts to ________ digits.

A.
seven
B.
eight
C.
11
D.
five

Your Answer: Option (Not Answered)

Correct Answer: Option A

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7.

Which of the following gates has the exact inverse output of the OR gate for all possible input combinations?

A.
NOR
B.
NOT
C.
NAND
D.
AND

Your Answer: Option (Not Answered)

Correct Answer: Option A

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8.

How many 2-input NOR gates does it take to produce a 2-input NAND gate?

A.
1
B.
2
C.
3
D.
4

Your Answer: Option (Not Answered)

Correct Answer: Option D

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9.

A digital circuit that converts coded information into a familiar or non-coded form is known as an encoder.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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10.

In VHDL, each instance of a component is given a name followed by a semicolon and the name of the library primitive.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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11.

The postponed symbol () on the output of a flip-flop identifies it as being ________.

A.
a D flip-flop
B.
a J-K flip-flop
C.
pulse triggered
D.
trailing edge-triggered

Your Answer: Option (Not Answered)

Correct Answer: Option C

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12.

Which of the following procedures could be used to check the parallel loading feature of a counter?

A.
Preset the LOAD inputs, set the CLR to its active level, and check to see that the Q outputs match the values preset into the LOAD inputs.
B.
Apply LOWs to the parallel DATA inputs, pulse the CLK input, and check for LOWs on all the Q outputs.
C.
Apply HIGHs to all the DATA inputs, pulse the CLK and CLR inputs, and check to be sure that the Q outputs are all LOW.
D.
Apply HIGHs to all the Q terminals, pulse the CLK, and check to see if the DATA terminals now match the Q outputs.

Your Answer: Option (Not Answered)

Correct Answer: Option B

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13.

To design a divide-by-200 counter using synchronous counters, two 4-bit counters could be cascaded together to form an 8-bit counter.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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14.

The refresh period for capacitors used in DRAMs is ________.

A.
2 ms
B.
2 s
C.
64 ms
D.
64 s

Your Answer: Option (Not Answered)

Correct Answer: Option A

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15.

The output of this circuit is always ________.

A.
1
B.
0  
C.
A
D.
A

Your Answer: Option (Not Answered)

Correct Answer: Option C

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16.

An ALU is a multipurpose device capable of providing several different logic operations.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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17.

One of the first steps in any HDL project is to define its scope by naming each input and output.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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18.

In the stepper motor, the half-step sequence is used when ________.

A.
less torque is needed
B.
larger steps are desired
C.
smaller steps are desirable
D.
more torque is needed

Your Answer: Option (Not Answered)

Correct Answer: Option C

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19.

What is the difference between the 74HC00 series and the 74HCT00 series of CMOS logic?

A.
The HCT series is faster.
B.
The HCT series is slower.
C.
The HCT series is input and output voltage compatible with TTL.
D.
The HCT series is not input and output voltage compatible with TTL.

Your Answer: Option (Not Answered)

Correct Answer: Option C

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20.

Which of the following buses is primarily used to carry signals that direct other ICs to find out what type of operation is being performed?

A.
data bus
B.
control bus
C.
address bus
D.
address decoder bus

Your Answer: Option (Not Answered)

Correct Answer: Option B

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