Exam Questions Paper - ECE Questions and Answers

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A 2 bit binary multiplier can be implemented using

2 inputs ANDs only

2 inputs XORs and 4 input AND gates only

Two 2 inputs NORs and one XNOR gate

XOR gates and shift registers

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Which one of the following circuits is used for converting a sine wave into a square wave?

Astable multivibration

Monostable multivibration

Bistable multivibration

Schmitt trigger

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A super heterodyne receiver has a IF of 465 kHz. It is tuned to a station broadcasting at 500 KHz and its oscillator is operating at 965 KHz, then the 1330 KHz frequency would be

adjacent channel frequency

image frequency

gyro frequency

maximum usable frequency

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Following are the properties of impulse function

x(t) ∂(t) = x (0)∂(t)
∂(- t) = ∂(t)

Choose the correct option

1-true, 2-false, 3-true

1-false, 2-true, 3-true

1-true, 2-true, 3-true

1-true, 2-true, 3-false

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What is an advantage of an electronic voltmeter over a non-electronic voltmeter?

Low power consumption

Low input impedance

The ability to measure wide ranges of voltages and resistance

Large portability

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Which of the following statements is/are true for the diamond structure?

Coordination number is four.
Packing fraction is 0.34
Copper crystallizes into diamond structure
Lattice is FCC.

1 only

1, 2 and 4

2 and 3 only

2, 3 and 4

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Assertion (A): There are no convergence issues with the discrete-time Fourier series in general.

Reason (R): A discrete-time signal is always obtained by sampling a continuous-time signal.

Both A and R are individually true and R is the correct explanation of A

Both A and R are individually true but R is not the correct explanation of A

A is true but R is false

A is false but R is true

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Which is the dominant mode in rectangular waveguides?

TE₁₀

TE₁₁

TE₀₁

TM₁₁

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Which of the following are the memory performance parameters?

Access time and latency
Block size and Block access time
Cycle time and Bandwidth

Select the correct answer from the codes given below:

1 only

1 and 2 only

2 and 3 only

1, 2 and 3