NIELIT CCC Previous Year Question Papers with Answers 2024-2025 Pdf - 1

Question: 1

Buffering is

(A) A method to reduce the routing overhead

(B) A method to reduce cross talks

(C) The process of temporarily storing the data to allow for small variation in device speeds

(D) Storage of data within the transmitting medium until the receiver is ready to receive

Question: 2

Satellite transponders

(A) Are devices that echos the radiation without change from one point on earth to another

(B) Use a single frequency for reception and transmission from one point on earth to another

(C) Use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations

(D) Use a higher frequency for reception of radiation from earth stations and lower frequency for transmission to earth stations

Question: 3

When amplitude of pulses is varied to represent analog information, the method is called

(A) PAM

(B) PCM

(C) PPM

(D) PWM

Question: 4

Digital cellular radio systems

(A) Allow multiple subscribers to share the use of a common channel within a cell

(B) Allow multiple subscribers to share the use of cells

(C) Expand number of cells

(D) Extend transmission distance of subscribers within a cell

Question: 5

A bipolar violation

(A) Represents a one bit followed by a zero bit

(B) Occurs when two successive pulses have the same polarity and are separated by a one level

(C) Occurs when two successive pulses have the same polarity and are separated by a zero level

(D) Represents a zero bit followed by one bit