Digital Electronics (NTA-NET (Based on NTA-UGC) Electronic Science (Paper-II)): Questions 1 - 4 of 29

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Question number: 1

» Digital Electronics » Arithmetic Circuits

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Appeared in Year: 2017

MCQ▾

Question

The addition of two binary variables A and B results into a SUM and a CARRY output. Consider the following expressions for SUM and CARRY outputs.

(1)

(2)

(3)

(4)

Which of the following expressions are correct? (November paper 2)

Choices

Choice (4)Response

a.

(1) and (4)

b.

(1) and (3)

c.

(2) and (3)

d.

(4) and (2)

Question number: 2

» Digital Electronics » Boolean Algebra and Minimization Techniques

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Appeared in Year: 2017

MCQ▾

Question

The Boolean SOP expression obtained from the truth table is:

Table of Boolean SOP expression

Table of Boolean SOP expression

Inputs

Output

A

B

C

X

(November paper 2)

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 3

» Digital Electronics » AD and DA Converters

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Appeared in Year: 2018

MCQ▾

Question

Which of the following statements are correct for the A/D converters:

1) The advantage of using a dual slope A/D converter in a digital voltmeter is that its accuracy is high.

2) The number of comparators in a -bit flash A/D converters is.

3) The minimum number of comparators required to build an -bit flash A/D converters is.

4) The number of comparators required in a 3-bit comparator type A/D converters is. (July)

Choices

Choice (4)Response

a.

1) and 2) are correct

b.

2) and 3) are correct

c.

1), 2), 3) and 4) are correct

d.

1), 3) and 4) are correct

Question number: 4

» Digital Electronics » Flip - Flops

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Appeared in Year: 2018

MCQ▾

Question

In a J-K flip-flop we have J = Q and K = 1 (shown in figure). Assuming the flip-flop was initially cleared and clocked for 6 pulses, the sequence at the Q output will be: (July)

Image of J-K flip-flop

Image of J-K Flip-Flop

Image of J-K flip-flop

Choices

Choice (4)Response

a.

011001

b.

c.

d.

010010

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