Sasken Placement: Sample Questions 29 - 30 of 35

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Question 29

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TCP/IP belongs to which layer and what it does?

Explanation

Transport Control Protocol (TCP) is one of the main protocols in TCP/IP networks. Whereas the protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent.

There Are Five Layers in TCP/IP Model: Physical, Data Link, IP, TCP/UDP, Applivation and Service. There Are Seven Layers in OSI Reference Model: Physical, Data Link, Network, Transport, Session, Presentation, Application and Service. All Functions Which OSI Layer Can Do Can be Done by TCP/IP Layer

Question 30

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What are metacharacters?

Explanation

  • A metacharacter (sometimes spelled metacharacter or meta-character) is a special character in a program or data field that provides information about other characters. A metacharacter can express an idea about how to process the characters that follow the metacharacter, as the backslash character sometimes is used to indicate that the characters following it are to be treated in a special way. A common metacharacter usage is the wildcard character, which can represent either any one character or any string of characters. In UNIX shells, metacharacters include, but are not limited to these:
  • ⚹ ; |] [?
  • Each of these characters has a special meaning on the command line, and their use must be avoided for purposes other than their special meaning.

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