In the name of ALLAH, the most beneficient, the most merciful

Data Communication (CS601)

Multiple Choice Questions (MCQs)

 

Objective Questions

Question

Is there any difference between Data communication and telecommunication are network?

  1. Yes
  2. No

Answer: 2 Chapter No. 1 

Question

Two or more computers connected so that they can communicate with each other and share information is called a

  1. satellite
  2. protocol
  3. broadcast
  4. network

Answer: 4 Chapter No. 1 

Question

The transmission medium that carries the message is referred to as the __________.

  1. send and receive device
  2. communication channel
  3. protocol
  4. gateways

Answer: 2 Chapter No. 2 

Question

To make sure that source does not overwhelm destination by sending data faster than it can be handled and processed is called?

  1. Addressing & Routing
  2. Exchange Management
  3. Flow Control
  4. Recovery

Answer: 3 Chapter No. 3 

Question

By using ________ system, change in the file contents during file transmission can be avoided.

  1. Routing
  2. Flow Control
  3. Error Detection and Correction
  4. Congestion Control

Answer: 3 Chapter No. 3 

Question

A portion of the path that carries TX between a given pair of devices is known as ___________.

  1. Direct Point
  2. Bridge
  3. Channel
  4. Access Point

Answer: 3 Chapter No. 4 

Question

Line Configuration refers to the way two or more devices attach to a __________.

  1. Path
  2. Circuit
  3. Link
  4. Router

Answer: 3 Chapter No. 4 

Question

If users must take turns using the link, then it is called Spatial Sharing.

  1. true
  2. false

Answer: 2 Chapter No. 4 

Question

There are three types of Hubs that exist. Which of the following options correctly describes these three?

  1. Passive, dormant, special
  2. Active , dormant , passive
  3. Passive, Active, Turbo
  4. Passive, Active, Intelligent

Answer: 4 Chapter No. 5 

Question

Central Hub in a Tree is an ________.

  1. Active hub
  2. passive hub

Answer: 1 Chapter No. 5 

Question

________ contains a repeater.

  1. Active hub
  2. Passive hub

Answer: 1 Chapter No. 5 

Question

In __________ a dedicated communication path is established between two stations through the nodes of the network

  1. Circuit switching
  2. Packet switching

Answer: 1 Chapter No. 6 

Question

Traditionally MANs have been implemented using one of the 2 technologies, Circuit Switching and Packet Switching

  1. true
  2. false

Answer: 2 Chapter No. 6 

Question

In OSI model headers are added at layer _________.

  1. 1,2,3 only
  2. 6,5,7 only
  3. 5,4,3 only
  4. 6,5,4,3,2 only

Answer: 4 Chapter No. 7 

Question

The Internet is __________________.

  1. software for sending e-mail around the world
  2. a government-owned agency that links computers
  3. a global network of computers networks
  4. a specialised form of local area network

Answer: 3 Chapter No. 7 

Question

Which level of the TCP/IP reference model routes data/information across a network channel?

  1. Application Layer
  2. Data Link Layer
  3. Transport Layer
  4. Network Layer

Answer: 4 Chapter No. 8 

Question

Session layer is responsible for _________.

  1. Reassembly of data
  2. Maintaining the connection

Answer: 2 Chapter No. 9 

Question

Like Data link layer, ________ is also responsible for Flow control.

  1. Transport Layer
  2. Session Layer

Answer: 1 Chapter No. 9 

Question

Which layer is concerned with the syntax and semantics of info exchange between two systems?

  1. Physical
  2. Application
  3. Session
  4. Presentation

Answer: 4 Chapter No. 9 

Question

Each computer on the Internet has a unique numeric address called a(n)

  1. domain address
  2. protocol address
  3. IP address
  4. Web address

Answer: 3 Chapter No. 10 

Question

Analog refers to something that is continuous in _________.

  1. Time
  2. Space
  3. Frequency
  4. None of the given

Answer: 1 Chapter No. 11 

Question

A sine wave is ________.

  1. periodic and discrete
  2. aperiodic and discrete
  3. periodic and continuous
  4. aperiodic and continuous

Answer: 3 Chapter No. 11 

Question

Digital signals are refers to be _____________.

  1. Continuous
  2. Discrete
  3. All of above
  4. None

Answer: 2 Chapter No. 11 

Question

Human voice is example of _________ signal.

  1. Digital
  2. Analog
  3. Discrete
  4. None of the given

Answer: 2 Chapter No. 11 

Question

________ is the rate of change with respect to time.

  1. Voltage
  2. Time
  3. Frequency
  4. Amplitude

Answer: 4 Chapter No. 11 

Question

Analog signals are refers to be

  1. Continuous
  2. Discrete
  3. Periodic
  4. Aperiodic

Answer: 1 Chapter No. 11 

Question

What is the period of a Sine wave having frequency of 10 Hz?

  1. 0.2
  2. 0.1
  3. 0.5
  4. 0.3

Answer: 2 Chapter No. 12 

Question

What is the period of a Sine wave having frequency of 5 Hz.

  1. 0.2
  2. 0.1
  3. 0.5
  4. 0.3

Answer: 1 Chapter No. 12 

Question

What is the frequency of a sine wave if it completes one cycle in 2 seconds?

  1. 0.5
  2. 0.6
  3. 0.3
  4. 0.2

Answer: 1 Chapter No. 12 

Question

What is the period of a Sine wave having frequency of 2 Hz.

  1. 0.2
  2. 0.1
  3. 0.5
  4. 0.3

Answer: 3 Chapter No. 12 

Question

Time domain plot show changes in signal phase with respect to time.

  1. true
  2. false

Answer: 2 Chapter No. 12 

Question

Time domain shows changes in __________.

  1. time w.r.t signal amplitude
  2. signal amplitude w.r.t time
  3. time
  4. All of above

Answer: 2 Chapter No. 12 

Question

What is the frequency of a sine wave if it completes one cycle in 5 seconds?

  1. 0.5
  2. 0.6
  3. 0.3
  4. 0.2

Answer: 4 Chapter No. 12 

Question

What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 300, 600, 900 and 1200?

  1. 100
  2. 900
  3. 300
  4. 600

Answer: 2 Chapter No. 13 

Question

__________ of a signal is the collection of all the component frequencies it contains

  1. Time domain
  2. Frequency domain
  3. Frequency spectrum
  4. None of above

Answer: 3 Chapter No. 13 

Question

What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 200, 400, 600 and 800?

  1. 100
  2. 500
  3. 300
  4. 600

Answer: 4 Chapter No. 13 

Question

Encoding digital data into digital signals is called _____________.

  1. Analog-to-Digital Conversion
  2. Digital-to-Digital Conversion
  3. Digital-to-Analog Conversion
  4. None of above

Answer: 2 Chapter No. 14 

Question

RZ stands for ____________.

  1. Return to Z
  2. Retire a Zero
  3. Return ot Zero
  4. None of above

Answer: 3 Chapter No. 14 

Question

Digitizing an Analog Signal is called ___________.

  1. Analog-to-Digital Conversion
  2. Digital-to-Digital Conversion
  3. Digital-to-Analog Conversion
  4. None of above

Answer: 1 Chapter No. 14 

Question

The level of signal is always positive in NRZ encoding.

  1. true
  2. false

Answer: 2 Chapter No. 14 

Question

The inversion of the level represents a 1 bit in ______ encoding

  1. NRZ-I
  2. NRZ-L
  3. RZ
  4. Manchester

Answer: 1 Chapter No. 14 

Question

________ encoding is almost obsolete today

  1. Bipolar
  2. Unipolar
  3. Polar
  4. None of the given

Answer: 2 Chapter No. 14 

Question

In the encoding where positive to negative transition is one and vice versa is zero?

  1. Manchester
  2. Differential Manchester
  3. All of above
  4. None of given

Answer: 4 Chapter No. 15 

Question

Which of the following statement is correct?

  1. Digital signals are less prone to Noise
  2. Digital signals are highly prone to Noise
  3. Analog Signals are less prone to Noise
  4. Digital signals are not affected by Noise

Answer: 1 Chapter No. 16 

Question

Quantization is a method of assigning ________ values in a specific range to sampled instances.

  1. Negative
  2. Positive
  3. Binary
  4. Integral

Answer: 4 Chapter No. 16 

Question

In analog transmission, the base signal is called the________.

  1. Carrier Signal
  2. Analog signal
  3. Digital signal
  4. Modulated signal

Answer: 1 Chapter No. 17 

Question

In ASK, Noise usually affects the ________.

  1. Amplitude
  2. Phase
  3. Sample
  4. Frequency

Answer: 1 Chapter No. 17 

Question

Following characteristics fully describe ____________.
Amplitude
Period/Frequency
Phase

  1. Sine Waves
  2. Digital Signals
  3. Aperiodic Signals
  4. None of the given

Answer: 1 Chapter No. 17 

Question

In ASK, both ______ and ________ remain constant.

  1. Amplitude, Frequency
  2. Amplitude, phase
  3. Frequency, Phase
  4. Amplitude, Samples

Answer: 3 Chapter No. 17