Data Interpretation - General Aptitude - General Aptitude (GA) Previous Year Questions

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2015 · General Aptitude (GA) · General Aptitude · Data Interpretation

Electronics & Communication Engineering (EC) 2015 [Session 1]

The waveform of a periodic signal \( x(t) \) is shown in the figure.
A signal \( g(t) \) is defined by \( g(t) = x\left( \frac{t-1}{2} \right) \). The average power of \( g(t) \) is________.

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2

2015 · General Aptitude (GA) · General Aptitude · Data Interpretation

Electronics & Communication Engineering (EC) 2015 [Session 1]

Consider the signal \(s(t) = m(t)\cos(2\pi f_c t) + \hat{m}(t)\sin(2\pi f_c t)\) where \(\hat{m}(t)\) denotes the Hilbert transform of \(m(t)\) and the bandwidth of \(m(t)\) is very small compared to \(f_c\). The signal \(s(t)\) is a

A

high-pass signal

B

low-pass signal

C

band-pass signal

D

double sideband suppressed carrier signal

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3

2015 · General Aptitude (GA) · General Aptitude · Data Interpretation

Electronics & Communication Engineering (EC) 2015 [Session 1]

For the NMOSFET in the circuit shown, the threshold voltage is \(V_{th}\), where \(V_{th} > 0\). The source voltage \(V_{SS}\) is varied from 0 to \(V_{DD}\). Neglecting the channel length modulation, the drain current \(I_D\) as a function of \(V_{SS}\) is represented by

A

B

C

D

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4

2015 · General Aptitude (GA) · General Aptitude · Data Interpretation

Electronics & Communication Engineering (EC) 2015 [Session 2]

Consider a binary, digital communication system which uses pulses \(g(t)\) and \(-g(t)\) for transmitting bits over an AWGN channel. If the receiver uses a matched filter, which one of the following pulses will give the minimum probability of bit error?

A

Graph A: A rectangular pulse of height 1 from \(t=0\) to \(t=1\).

B

Graph B: A triangular pulse increasing linearly from 0 to 1 from \(t=0\) to \(t=1\), then decreasing linearly back to 0 at \(t=2\).

C

Graph C: A triangular pulse decreasing linearly from 1 to 0 from \(t=0\) to \(t=1\).

D

Graph D: A triangular pulse increasing linearly from 0 to 1 from \(t=0\) to \(t=1\), then abruptly dropping to 0 at \(t=1\).

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5

2015 · General Aptitude (GA) · General Aptitude · Data Interpretation

Electronics & Communication Engineering (EC) 2015 [Session 3]

In the circuit shown in the figure, the BJT has a current gain (β) of 50. For an emitter-base voltage VEB = 600 mV, the emitter-collector voltage VEC (in Volts) is ______.

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6

2015 · General Aptitude (GA) · General Aptitude · Data Interpretation

Electronics & Communication Engineering (EC) 2015 [Session 3]

The electric field profile in the depletion region of a p-n junction in equilibrium is shown in the figure. Which one of the following statements is NOT TRUE?

A

The left side of the junction is n-type and the right side is p-type

B

Both the n-type and p-type depletion regions are uniformly doped

C

The potential difference across the depletion region is 700 mV

D

If the p-type region has a doping concentration of \(10^{15}\) cm\(^{-3}\), then the doping concentration in the n-type region will be \(10^{16}\) cm\(^{-3}\)

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