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Computer Aptitude

BASIC COMPUTER KNOWLEDGE MCQs

Total Questions : 1975 | Page 8 of 198 pages
Question 71.  wireless transmission can be done via
  1.    radio waves
  2.    microwaves
  3.    infrared
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Explanation :
Question 72.  two devices are in network if
  1.    a process is running on both devices
  2.    a process in one device is able to exchange information with a process in another device
  3.    PIDs of the processes running of different devices are same
  4.    none of these
 Discuss Question
Answer: Option B. -> a process in one device is able to exchange information with a process in another device
Explanation :
Question 73.  which transmission media has the highest transmission speed in a network?
  1.    coaxial cable
  2.    twisted pair cable
  3.    optical fiber
  4.    electrical cable
 Discuss Question
Answer: Option C. -> optical fiber
Explanation :
Question 74.  which transmission media has the highest transmission speed in a network?
  1.    coaxial cable
  2.    twisted pair cable
  3.    optical fiber
  4.    electrical cable
 Discuss Question
Answer: Option C. -> optical fiber
Explanation :
Question 75.  the portion of physical layer that interfaces with the media access control sublayer is called
  1.    physical signalling sublayer
  2.    physical data sublayer
  3.    physical address sublayer
  4.    none of these
 Discuss Question
Answer: Option A. -> physical signalling sublayer
Explanation :
Question 76.  in asynchronous serial communication the physical layer provides
  1.    start and stop signalling
  2.    flow control
  3.    both (A) and (B)
  4.    none of these
 Discuss Question
Answer: Option C. -> both (A) and (B)
Explanation :
Question 77.  the data link layer takes the packets from _____ and encapsulates them into frames for transmission.
  1.    network layer
  2.    physical layer
  3.    transport layer
  4.    application layer
 Discuss Question
Answer: Option A. -> network layer
Explanation :
Question 78.  header of a frame generally contains
  1.    synchronization bytes
  2.    addresses
  3.    frame identifier
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Explanation :
Question 79.  when 2 or more bits in a data unit has been changed during the transmission, the error is called
  1.    random error
  2.    burst error
  3.    inverted error
  4.    none of these
 Discuss Question
Answer: Option B. -> burst error
Explanation :
Question 80.  the data link layer takes the packets from _____ and encapsulates them into frames for transmission.
  1.    network layer
  2.    physical layer
  3.    transport layer
  4.    application layer
 Discuss Question
Answer: Option A. -> network layer
Explanation :

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