1
GATE ECE 2020
Numerical
+2
-0

The transfer function of a stable discrete - time LTI system is $H(z)=\frac{K(z-\alpha)}{(z+0.5)}$ where $K$ and $\alpha$ are real numbers. The value of $\alpha$ (rounded off to one decimal place) with $|\alpha|>1$, for which magnitude response of the system is constant over all frequencies, is $\_\_\_\_$ .

Your input ____
2
GATE ECE 2020
MCQ (Single Correct Answer)
+2
-0.67

A finite duration discrete-time signal $x[n]$ is obtained by sampling a continuous - time signal $x(t)=\cos (200 \pi t)$ at sampling instants $t=\frac{n}{400}, n=0,1, \ldots ., 7$. The 8-point discrete Fourier transform (DFT) is defined as

$$ X[k]=\sum_{n=0}^7 x[n] e^{-j \pi n k / 4} \text { for } k=0,1, \ldots ., 7 $$

Which one of the following statements is TRUE?

A

Only $X(3)$ and $X(5)$ are non-zero.

B

Only $X(4)$ is non-zero.

C

All $X(K)$ are non-zero.

D

Only $X(2)$ and $X(6)$ are non-zero.

3
GATE ECE 2020
MCQ (Single Correct Answer)
+1
-0.33

He was not only accused of theft $\_\_\_\_$ of conspiracy.

A

but also

B

but even

C

rather

D

rather than

4
GATE ECE 2020
MCQ (Single Correct Answer)
+1
-0.33

The Canadian constitution requires that equal importance be given to English and French. Last year, Air Canada lost a lawsuit and had to pay a six-figure fine to a French speaking couple after they filed complaints about formal in-flight announcements in English lasting 15 seconds, as opposed to informal 5 second messages in French.

The French - speaking couple were upset at $\_\_\_\_$ .

A

the English announcements being longer than French ones.

B

equal importance being given to English and French.

C

the English announcements being clearer than the French ones.

D

the in-flight announcements being made in English.