Digital Electronics MCQ Questions & Answers

91

Both transistors T₁ and T₂ shown in the figure, have a threshold voltage of 1 Volts. The device parameters K₁ and K₂ of T₁ and T₂ are respectively, 36 µA/V² and 9 µA/V². The output voltage V₀ is
Digital Electronics mcq question image

A) 1 V B) 2 V C) 3 V D) 4 V

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

92

In the following state table, the equivalent states are
Digital Electronics mcq question image

A) (a, d)(b, c) B) (a, c)(b, d) C) (a, b)(c, d) D) (a, c)

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

93

The expression for the truth table given below in POS form is given by:

A B	C	F
0 0	0	1
0 0	1	0
0 1	0	1
0 1	1	1
1 0	0	1
1 0	1	1
1 1	0	1
1 1	1	0

A) AB'C + ABC' B) (A + B + C')(A' + B' + C') C) A'B'C + ABC D) (A + B' + C')(A' + B' + C')

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

94

Consider the following statements regarding configuration of TTL devices:
1. The output impedance of totem pole transistor is high.
2. Open collector output devices have low switching speed.
3. Power consumption of Schottky devices is high.
4. Tri-state output devices have high switching speed.
Of these statements:

A) 1 and 2 are correct B) 1, 3 and 4 are correct C) 2 and 3 are correct D) 2, 3 and 4 are correct

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

95

An input frequency of 12 KHz is applied to the J-K flip-flops arrangement shown in the given figure. The resulting output frequency will be
Digital Electronics mcq question image

A) 24 KHz B) 12 KHz C) 6 KHz D) 3 KHz

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

96

Consider the Karnaugh map given below : The function represented by this map can be simplified to the minimal form as
Digital Electronics mcq question image

A) $${{\text{x}}_1}{\overline {\text{x}} _2}{\overline {\text{x}} _4} + {{\text{x}}_2}{{\text{x}}_4} + {{\text{x}}_1}{\overline {\text{x}} _3}$$ B) $${{\text{x}}_1}{{\text{x}}_2}{{\text{x}}_4} + {{\text{x}}_2}{{\text{x}}_4} + {{\text{x}}_1}{\overline {\text{x}} _2}{\overline {\text{x}} _3}{\overline {\text{x}} _4}$$ C) $${{\text{x}}_2}{{\text{x}}_4} + {\overline {\text{x}} _2}{\overline {\text{x}} _4} + {{\text{x}}_1}{\overline {\text{x}} _3}$$ D) $${{\text{x}}_1}{\overline {\text{x}} _2}{\overline {\text{x}} _4} + {\overline {\text{x}} _1}{{\text{x}}_2}{\overline {\text{x}} _3}{{\text{x}}_4} + {{\text{x}}_1}{{\text{x}}_2}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

97

Which one of the following Boolean expressions is NOT correct?

A) $$\overline {{\text{x}} + {\text{y}}} = \overline {\text{x}} \overline {\text{y}} $$ B) $$\overline {\overline {\overline {\text{x}} } + {\text{y}}} = \overline {\text{x}} \overline {\text{y}} $$ C) $$\overline {\overline {\overline {\text{x}} } + \overline {\overline {\text{y}} } } = \overline {\text{x}} + \overline {\text{y}} $$ D) $$\overline {\overline {\text{x}} + \overline {\text{y}} } = {\text{xy}}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

98

The number of digit 1 present in the binary representation of 3 × 512 + 5 × 64 + 7 × 8 + 3 is:

A) 9 B) 16 C) 8 D) 10

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

99

The fastest ADC among the following is

A) Successive approximation type B) Dual slope type C) Sigma-Delta ADC D) Flash converter

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

100

What will be the simplified Boolean function of the given equation? F(a, b, c) = Σ(0, 2, 4, 5, 6)

A) ac' + b B) c' + ab' C) a + b + c D) a'b + c

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Digital Electronics MCQ Questions & Answers | ECE