3i Infotech Placement: Sample Questions 841 - 842 of 1245

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Question 841

Question

MCQ▾

A MB PCM (Pulse Code Modulation) has

Choices

Choice (4)

a.

channels out of which voice channel, signalling channel, & synchronization channel.

b.

channels

c.

voice channels & signalling channel.

d.

voice channels & signalling channel.

Answer

c.

Explanation

Block Diagram of PCM
  • The Pulse Code Modulation process is done in three steps Sampling, Quantization, and Coding.
    • A MB PCM (Pulse Code Modulation) has voice channels & signalling channel.
    • PCM is a digital representation of an analogue signal with samples of the amplitude at regular intervals.
    • This digital sampled analog data can then be changed to binary data.
  • PCM requires a very accurate clock.
  • The number of samples per second must be from to - usually several times the maximum frequency of the analog waveform in Hertz (Hz) , or cycles per second, which ranges from KHz.
  • Analog signal can be reproduced by demodulation.

Question 842

Edit

Describe in Detail

Essay▾

What is accessor?

Explanation

  • AN accessor is a class operation that does not modify the state of an object.
  • The accessor functions need to be declared as const operations.
  • Accessor methods allow the programmer to obtain the value of an object՚s instance variables
  • The data can be accessed but not changed
  • The name of an accessor method typically starts with the word ‘get’
Given the Accessor Method Getx () and Gety () Methods

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