Ques 1Analog Electronics

Select the correct statement(s) regarding CMOS implementation of NOT gates.

a. Noise Margin High (𝑁M_H) is always equal to the Noise Margin Low (𝑁𝑀_L), irrespective of the sizing of transistors.
b. Dynamic power consumption during switching is zero.
c. For a logical high input under steady state, the nMOSFET is in the linear regime of operation.
d. Mobility of electrons never influences the switching speed of the NOT gate.

Ques 2Aptitude

Mr. X speaks _________ Japanese _________ Chinese.

a. neither / or
b. either / nor
c. neither / nor
d. also / but

Ques 3Aptitude

A sum of money is to be distributed among P, Q, R, and S in the proportion 5 : 2 : 4 : 3, respectively.
If R gets ₹ 1000 more than S, what is the share of Q (in ₹)?

a. 500
b. 1000
c. 1500
d. 2000

Ques 4Aptitude

A trapezium has vertices marked as P, Q, R and S (in that order anticlockwise). The side PQ is parallel to side SR.
Further, it is given that, PQ = 11 cm, QR = 4 cm, RS = 6 cm and SP = 3 cm. What is the shortest distance between PQ and SR (in cm)?

a. 1.80
b. 2.40
c. 4.20
d. 5.76

Ques 5Aptitude

Mosquitoes pose a threat to human health. Controlling mosquitoes using chemicals may have undesired consequences. In Florida, authorities have used genetically modified mosquitoes to control the overall mosquito population. It remains to be seen if this novel approach has unforeseen consequences.
Which one of the following is the correct logical inference based on the information in the above passage?

a. Using chemicals to kill mosquitoes is better than using genetically modified mosquitoes because genetic engineering is dangerous
b. Using genetically modified mosquitoes is better than using chemicals to kill mosquitoes because they do not have any side effects
c. Both using genetically modified mosquitoes and chemicals have undesired consequences and can be dangerous
d. Using chemicals to kill mosquitoes may have undesired consequences but it is not clear if using genetically modified mosquitoes has any negative consequence

Ques 6Aptitude

Consider the following inequalities.
(i) 2𝑥 − 1 > 7
(ii) 2𝑥 − 9 < 1
Which one of the following expressions below satisfies the above two inequalities?

a. 𝑥 ≤ −4
b. −4 < 𝑥 ≤ 4
c. 4 < 𝑥 < 5
d. 𝑥 ≥ 5

Ques 7Aptitude

Four points P(0, 1), Q(0, −3), R(−2, −1), and S(2, −1) represent the vertices of a quadrilateral.
What is the area enclosed by the quadrilateral?

a. 4
b. 4√2
c. 8
d. 8√2

Ques 8Aptitude

In a class of five students P, Q, R, S and T, only one student is known to have copied in the exam. The disciplinary committee has investigated the situation and recorded the statements from the students as given below.

Statement of P: R has copied in the exam.
Statement of Q: S has copied in the exam.
Statement of R: P did not copy in the exam.
Statement of S: Only one of us is telling the truth.
Statement of T: R is telling the truth.
The investigating team had authentic information that S never lies.Based on the information given above, the person who has copied in the exam is

a. R
b. P
c. Q
d. T

Ques 9Communication Systems

A symbol stream contains alternate QPSK and 16-QAM symbols. If symbols from this stream are transmitted at the rate of 1 mega-symbols per second, the raw (uncoded) data rate is _______ mega-bits per second (rounded off to one decimal place)

Ques 10Digital Electronics

Select the Boolean function(s) equivalent to 𝑥 + 𝑦𝑧, where 𝑥, 𝑦, and 𝑧 are Boolean variables, and + denotes logical OR operation.

a. 𝑥 + 𝑧 + 𝑥𝑦
b. (𝑥 + 𝑦)(𝑥 + 𝑧)
c. 𝑥 + 𝑥𝑦 + 𝑦𝑧
d. 𝑥 + 𝑥𝑧 + 𝑥y

Ques 11Electromagnetics

In a circuit, there is a series connection of an ideal resistor and an ideal capacitor. The conduction current (in Amperes) through the resistor is 2sin(𝑡 + 𝜋/2). The displacement current (in Amperes) through the capacitor is _________.

a. 2sin(𝑡)
b. 2sin(𝑡 + 𝜋)
c. 2sin(𝑡 + 𝜋/2)
d. 0

Ques 12Electronic Devices

Select the CORRECT statement(s) regarding semiconductor devices.

a. Electrons and holes are of equal density in an intrinsic semiconductor at equilibrium.
b. Collector region is generally more heavily doped than Base region in a BJT.
c. Total current is spatially constant in a two terminal electronic device in dark under steady state condition.
d. Mobility of electrons always increases with temperature in Silicon beyond 300 K.