ECIL GET 2017 Recruitment: Electronics Section Quiz 7 for ESE & GATE EC Exams

Question 1

A signal x_n is given by

where the subscript ‘n’ denotes time. The peak value of the auto correlation of x[2n - 11] is:

Question 2

Consider the following transforms:
1) Fourier transforms
2) Laplace transforms
Which of the above transforms is/are used in signal processing?

Question 3

A weighted complete graph with n vertices has weights 2 |i - j| at edges (v_i, v_j) The weight of a minimum spanning tree is

Question 4

Direction: Each of the question consist of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answer to these items using the codes given below:

Statement (I): Photodiodes are not used in relay circuits.
Statement (II): The current needed to activate photodiodes is very low even at high light intensities.

Question 5

For a random variable x having the PDF shown in the figure given below

the mean and the variance are, respectively

Question 6

In scintillation coating applications, shields of which material are generally placed around the photomultiplier tube to overcome interference effects of electrons deflected from their normal path?

Question 7

Continuity equation involves:

Question 8

Consider the following statement:
1) A multiplexer is analogous to a rotary switch.
2) A decoder is a combinational logic circuit that converts binary information from ‘n’ input lines to a maximum of 2n distinct elements at the output.
3). The Boolean expression of the output difference 'D’ from a full subtractor is exactly the same as the output sum 'S’ from a full adder.
Which of these statements is/are correct?

Question 9

The logic function; Out=ab+bc+ca
Defines.
1). The output of a 3-inputs XOR gate
2). The output of a 3-input majority gate
3). The sum output of a full adder
4). The Carry output of a full adder
Which of these statement are correct?

Question 10

The J-K flip-flop shown below is initially reset, so that Q = 0. If a sequence of four clock pulses is then applied, with the J and K inputs as given in the figure, the resulting sequence of values that appear at the output Q starting with its initial state, is given by
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