Why is digital data not easily affected by noise? - Avionics MCQ

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Why is digital data not easily affected by noise?

A)

Low frequency transmission

B)

High frequency transmission

C)

Cannot easily change binary 1 to 0

D)

High power transmission

Correct Answer : Cannot easily change binary 1 to 0

Explanation : Noise is inevitable in a signal transmission. In a digital transmission the amplitude of the noise must be higher than the amplitude of the signal at binary ’1’, which is generally not the case, and vice versa. The receiver can differentiate between binary ‘1’ and ‘0’ with a significant amount of noise.

Recently Updated in Avionics Questions

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

A)

Split cell architecture

B)

Fragmented architecture

C)

Harvard architecture

D)

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?

A)

Von Neumann limit

B)

Von Neumann bottleneck

C)

Von Neumann speed

D)

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?

A)

Easily programmable

B)

High sampling frequency

C)

Better processing capabilities

D)

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.

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