Electronics and Communication Engineering - Exam Questions Papers

21. 

Consider a feedback control system with open loop transfer function The type of the closed loop system is __________ .

A. zero
B. one
C. two
D. three

Answer: Option B

Explanation:

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22. 

A ring counter with 5 flip-flops will have __________ states.

A. 5
B. 10
C. 32
D. Infinite

Answer: Option A

Explanation:

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23. 

Assertion (A): It is not desirable to drive a transistor into hard saturation in high speed switching circuits.

Reason (R): It may not be possible to bring it back to cutoff state, if it is driven into hard saturation.

A. Both A and R are individually true and R is the correct explanation of A
B. Both A and R are individually true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer: Option C

Explanation:

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24. 

For an N-point FFT algorithm with N = 2m which one of the following statements is TRUE?

A. It is not possible to construct a signal flow graph with both input and output in normal order
B. The number of butterflies in the mth stage is N/m
C. In-place computation requires storage of only 2N node data
D. Computation of a butterfly requires only one complex multiplication

Answer: Option D

Explanation:

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25. 

What is the address space of 8086 CPU?

A. One Megabyte
B. 256 Kilobytes
C. 1 K Megabytes
D. 64 Kilobytes

Answer: Option A

Explanation:

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