Which of the following is a false reason for parallel lines not being used for long distances? - Avionics MCQ

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Which of the following is a false reason for parallel lines not being used for long distances?

A)

Cost factor

B)

Low speed

C)

Signal Attenuation

D)

Number of transmission channels

Correct Answer : Low speed

Explanation : One of the major disadvantages of using parallel transmission for long distance is that laying the data bus is costly. To cover a distance of 10km for an 8 bit system, we need a cable of 80km length. Parallel data are usually faster than serial since all the bits are transmitted simultaneously.

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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