Which of the following is not possible when the signal is analog?

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Modulation

Equalization

Data compression

Phase shifting

Correct Answer : Data compression

Explanation : Data compression is done by checking redundancy in data. Data redundancy checking is only possible when the data is in digital form and hence data compression cannot be done in analog signals.

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Which type of architecture uses different storage space for program code and the data?

Split cell architecture

Fragmented architecture

Harvard architecture

Von Neumann architecture

Correct Answer : Option (C) : Harvard architecture

Explanation : In a Harvard architecture microprocessor, there are two memories, a program or instruction memory, usually a ROM, and a data memory, which is a RAM. Also, there are two data paths into and out of the CPU between the memories. Because both instructions and data can be accessed simultaneously, very high-speed operation is possible.

What is the accessibility limitation of only one data or instruction set at a time from the memory called?

Von Neumann limit

Von Neumann bottleneck

Von Neumann speed

Von Neumann limitation

Correct Answer : Option (B) : Von Neumann bottleneck

Explanation : The accessibility limitation of only one data or instruction set at a time from the memory is called as Von Neumann bottleneck. This has the effect of greatly limiting the execution speed.

What is the reason for the need of high speed DSP?

Easily programmable

High sampling frequency

Better processing capabilities

Less power consumption at higher speeds

Correct Answer : Option (B) : High sampling frequency

Explanation : The time taken for input/output and the processing time together must be smaller than the sampling period to ensure the continuous flow of data. Since high sampling frequencies are needed for accurately converting the analog signal to digital, high speed DSP is a must.