Digital Electronics MCQs with Answers 2027

Q41

The number of product terms in the minimized sum-of-product expression obtained through the following K = map is (where, "d" denotes don't care states)

1	0	0	1
0	d	0	0
0	0	d	1
1	0	0	1

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Q42

Open question

The highest speed counter is

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Q43

Open question

The circuit shown in figure realizes the function:
Digital Electronics mcq question image

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Q44

Open question

Given the decimal number -19, and eight bit two's complement representation is given by

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Q45

Open question

A DEMUX with an 8-bit select input has:

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Q46

Open question

If the output of a logic gate is '1' when all its inputs are at logic '0', the gate is either

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Q47

Open question

Which of the following flip-flop cannot be converted to D-type (delay) flip-flop

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Q48

Open question

Among the following types of A/D converters, name the one which the analog signal is sampled at a frequency much higher than the Nyquist rate

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Q49

Open question

The number of comparators carried out in a 5 bit flash type A/D converter is

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Q50

Open question

In the expression A(A + B) by writing the first term A as (A + 0), the expression is best simplified as

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Q51

Open question

In a 3-input CMOS NAND gate, the substrate terminals of NMOS transistors are grounded (lowest potential available in the circuit) and the substrate terminals of PMOS transistors are connected to V_DD (maximum positive potential in the circuit). Which of the following transistors may suffer in this circuit from body bias effect?

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Q52

Open question

A 2-bit synchronous counter using two J-K flip flops is shown. The expressions for the inputs to the J-K flip flops are also shown in the figure. The output sequence of the counter starting from Q₁Q₂ = 00 is
Digital Electronics mcq question image

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Q53

Open question

Consider the following statements describing the property of a complementary MOS (CMOS) inverter:
1. It is a combination of an n-channel FET and a p-channel FET.
2. There is power dissipation when the input carriers the logical 1 signal.
3. There is no power dissipation when the input carries the logic 1 signal.
4. There is power dissipation during transition from 0 to 1 or from 1 to 0.
Which of the statements given above are correct:

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Q54

Open question

For the Boolean expression

A BC + A B C + AB C,

how many 1's are in the output column of the truth table

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Q55

Open question

The Boolean expression for the output of the logic circuit shown in the figure is
Digital Electronics mcq question image

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Q56

Open question

With the availability of 16 × 4 memory size, how many ICs (memory chips) will be required for the expansion of its word size in order to obtain 16 × 8 memory?

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Q57

Open question

An X-Y flip-flop, whose characteristic table is given below is to be implemented using J-K flip-flop. This can be done making

X	Y	Q_n+1
0	0	1
0	1	Q_n
1	0	$Q_{n}$
1	1	0

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Q58

Open question

The IC used for making a bidirectional universal shift register is-

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Q59

Open question

The output Y of the circuit shown below is
Digital Electronics mcq question image

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Q60

Open question

Consider the bit pattern 01010001. Which of the following has Hamming distance of exactly 2 from these patterns?

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