Computer Network (Basic Computer Awareness Knowledge/Govt Exams) MCQ's




Question 91 :
Avalanche photodiode receivers can detect bits of transmitted data by receiving

  1. 200 photons
  2. 100 photons
  3. 2000 photons
  4. 300 photons'
  

Question 92 :
What is required when more than one person uses a central computer at the same time?

  1. Light pen
  2. Mouse
  3. Terminal
  4. Digitizer
  

Question 93 :
Which of the following performs modulation and demodulation?

  1. modem
  2. satellite
  3. coaxial cable
  4. fiber optics
  

Question 94 :
Which type of switching uses the entire capacity of a dedicated link?

  1. Datagram Packet Switch-ing
  2. Virtual Circuit Packet Switching
  3. Circuit switching
  4. Message Switching
  

Question 95 :
A ___ is a collection of com-puters and device connected together.

  1. network
  2. memory card
  3. protocol
  4. central processing unit
  

Question 96 :
An example of digital, ratherthan analog, communication is

  1. DOS
  2. DDD
  3. WATS
  4. DOT
  

Question 97 :
A data terminal serves as an

  1. Effector
  2. sensor
  3. neither a nor b
  4. both a and b
  

Question 98 :
What is the minimum number of wires needed to send data over a serial communication link layer?

  1. 2
  2. 1
  3. 4
  4. 6
  

Question 99 :
Multiprogramming systems:

  1. Are easier to develop than single programming systems
  2. Execute more jobs in the same time period
  3. Execute each job faster
  4. Are used only one large mainframe computers.
  

Question 100 :
The transmission signal coding method of Tl carrier is called

  1. NRZ
  2. Bipolar
  3. Manchester
  4. Binary
  

Question 101 :
Which of the following types of channels moves data relatively slowly?

  1. narrow band channel
  2. voice band challen
  3. - wide band channel
  4. none of the above
  

Question 102 :
Number of bits per symbol used in Baudot code is .

  1. 7
  2. 9
  3. 8
  4. 5
  

Question 103 :
Which multiplexing technique transmits ariatog signals ?

  1. Asynchronous TDM
  2. Synchronous TDM
  3. FDM
  4. Both (2) and (3)
  

Question 104 :
The x.25 standard specifies a

  1. technique for start-stop data
  2. technique for dial access
  3. data bit rate
  4. DTE/DCE interface
  
Pages