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Exercise

Set - 1

Question 1 :

How does the race condition occur?

Answer :

It occurs when two or more processes are reading or writing some shared data and the final result depends on who runs precisely when.


Question 2 :

What is multiprogramming?

Answer :

Multiprogramming is a rapid switching of the CPU back and forth between processes.


Question 3 :

Name the seven layers of the OSI Model and describe them briefly.

Answer :

Physical Layer - covers the physical interface between devices and the rules by which bits are passed from one to another.
Data Link Layer - attempts o make the physical link reliable and provides the means to activate, maintain, and deactivate the link.
Network Layer - provides for the transfer of information between end systems across
some sort communications network.
Transport Layer - provides a mechanism for the exchange of data between end system.
Session Layer - provides the mechanism for controlling the dialogue between applications in end systems.
Presentation Layer - defines the format of the data to be exchanged between applications and offers application programs a set of data transformation services.
Application Layer - provides a means for application programs to access the OSI environment.


Question 4 :

What is the difference between TCP and UDP?

Answer :

TCP and UDP are both transport-level protocols. TCP is designed to provide reliable communication across a variety of reliable and unreliable networks and internets.

UDP provides a connectionless service for application-level procedures. Thus, UDP is basically an unreliable service; delivery and duplicate protection are not guaranteed.


Question 5 :

What does a socket consists of?

Answer :

The combination of an IP address and a port number is called a socket.