3i Infotech Placement: Sample Questions 767 - 769 of 1245

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Question 767

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Describe in Detail

Essay▾

Who is an Actor?

Explanation

  • Actor interacts with the system and initiates the process (that is USECASE) .
  • actor specifies a role of user or any other system that interacts with the subject.
  • Primary actor of a use case calls on the system services.
Given the Image is Defining the Actor in USECASE Diagram

Question 768

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Write in Short

Short Answer▾

How many jobs can be run concurrently on MVT?

Explanation

  • 15 jobs can run concurrently on Multiprogramming with a Variable number of Tasks (MVT) .
  • Job can move from one partition to another because of dynamic address binding
  • MVT is the memory management technique in which each job gets amount of memory it needs- even at cost of swapping other processes.
  • The partitioning of memory is dynamic and changes as jobs enter and leave the system.
  • MVT makes more “efficient” use of resources.
  • MVT however suffers from the problem of internal fragmentation

Question 769

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Write in Short

Short Answer▾

How this () is used with constructors?

Explanation

  • This () is used to invoke a constructor of the same class.
  • Used to call the constructor before using the functionality of method.

Example:

void getValue ()

{

this () ;

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