3i Infotech Papers: Sample Questions 693 - 695 of 1245

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Question number: 693

» Operating System » Unix

Essay Question▾

Describe in Detail

What is an advantage of executing a process in background?


Executing a process in background

Executing a Process in Background

Executing a process in background

  • The most common reason to put a process in the background is to do something else interactively without waiting for the process to complete.

  • This is done by adding a special background symbol, & at end of the command.

  • Tells the shell to execute the given command in the background.

  • Example:

    • cp*. *. . / backup& (cp is for copy).

Question number: 694

» Basic CS » Networks

Short Answer Question▾

Write in Short

Describe at a high level how two devices communicate over network.


  • Data communications is transmission of digital data between two computers.

  • Computer or data network is telecommunications network allowing computers to exchange data.

  • Physical connection between networked computing devices established through cable or wireless media.

  • The best example of a computer network is the Internet.

  • Communication hardware is capable of transmitting an analogue or digital signal- for example, computer modem, network interface card (NIC), Wi-Fi devices, and access points.

Question number: 695

» Operating System » Unix

Short Answer Question▾

Write in Short

What is the window of the working set of a process?


  • Some models uses a parameter k as the working-set window.

  • The idea is to examine the most recent k page references.

  • The set of pages in the most recent k page references is the working set.

  • If a page is in active use, it will in the working set.

  • If page is no longer used, it will drop from the working set k units after its last reference.