Digital Electronics MCQ Questions & Answers

Digital Electronics MCQ Questions & Answers | ECE

Learn Digital Electronics MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Digital Electronics MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-10 section-3

What is the addition of the binary numbers 11011011010 and 010100101?

A) 0111001000 B) 1100110110 C) 11101111111 D) 10011010011

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Answer & Solution

Answer: Option C

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For the circuit in figure, identify the Boolean function implemented
Digital Electronics mcq question image

A) $${\text{y}} = \overline {\left( {{\text{A}} + {\text{B}} + {\text{C}}} \right){\text{D}}} $$ B) $${\text{y}} = \overline {{\text{A}}{\text{.B}}{\text{.C}} + {\text{D}}} $$ C) y = ABC + D D) y = (A + B + C)D

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Answer: Option A

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1024 × 1 capacity RAM chips are available for a PC system, Which requires a memory capacity of 1024 bytes. Find out the number of RAM chips.

A) 1 B) 2 C) 4 D) 8

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Answer: Option D

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Dual-slope integration type Analog-to-Digital converters provide
1. Higher speeds compared to all other types of A/D converters.
2. Very good accuracy without putting extreme requirement on component stability.
3. Good rejection of power supply hum.
4. Poor resolution compared to all other types of A/D converters for the same number of bits.
Which of these statements are correct?

A) 2 and 3 only B) 3 and 4 only C) 4 and 1 only D) 1, 2, 3 and 4

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Answer & Solution

Answer: Option A

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The 2's complement representation of -17 is

A) 101110 B) 101111 C) 111110 D) 110001

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Answer: Option B

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The function (A ⊕ B) is to be realized using only 2-input NAND gates. The minimum number of 2-input NAND gates required for such a realization is

A) 3 B) 4 C) 5 D) 6

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Answer: Option B

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A flip-flop is a

A) Combinational logic circuit and edge sensitive B) Sequential logic circuit and edge sensitive C) Combinational logic circuit and level sensitive D) Sequential logic circuit and level sensitive

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Answer: Option B

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An 8-bit DAC produces V_out = 0.05 V for a digital input of 00000001. The full scale output will be nearly.

A) 12.8 V B) 17.8 V C) 22.8 V D) 27.8 V

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Answer: Option A

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An 8 bit ADC has a full scale input of 2.55 V. If other cumulative errors are 2.55 mV, determine the maximum error

A) 10 mV B) 12.55 mV C) 7.45 mV D) 2.55 mV

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Answer: Option B

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100

The MSB of a binary number has a weight of 512, the number consists of . . . . . . . .

A) 4 bits B) 10 bits C) 8 bits D) 16 bits

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Answer: Option B

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