Redpine Infotech Placement: Sample Questions 6 - 7 of 19

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Question 6

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Essay▾

What is the use of ARP in TCP/IP stack?

Explanation

• TCP/IP network has two addresses, one is physical and other is logical.
• TCP/IP network has two addresses, one is physical and other is logical.
• ARP provides bridge between these two addresses.
• Address resolution protocol (ARP) maps an internet protocol address (IP address) to a physical machine address.
• The ARP helps the IP directing datagrams to the exact receiving host by mapping the Ethernet addresses to known IP addresses.
• ARP is a dynamic resolution protocol used to match IP addresses to data link layer addresses.
• Lies in between data link layer and internet layer.
• Physical machine address is recognized in the local network.
• ARP is used as network layer protocol in the TCP/IP internet protocol.
• It is an important address resolution protocol.
• TCP protocol support is not always required in embedded uses of Internet technologies.
• The ARP protocol is just one component of a TCP/IP.

Question 7

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Essay▾

8 queen problem can be solved by using which method.

Explanation

• 8 queen problem can solved by using back tracking method.
• Back tracking is used to solving the problems like puzzles.
• Search path is followed and the algorithm backtracks at a particular point in the path.
• The backtracking happens when algorithm realizes path will not lead to a valid solution and then it follows another path starting from a previous decision point.

Ex. Of 8 Queen Problem

• Eight queen puzzle is the problem of placing eight chess queens on an chessboard.
• A solution required that no two queen share the same row, column, or diagonal.
• Strategy: the rows and columns are numbered through 1 to 8.
• Each queen is put on a different row without loss, we assume queen i is to be placed on row i.
• 8 tuple () , where is the column queen i is placed.

Implicit Constraints Are

• No two can be the same that is, all queens must be on different column.
• No two queens can be on the same diagonal.
• Reduce the size of space from 8- tuples.
• First solution is (4, 6 , 8 , 2, 7,6, 3,5)
• Second solution is (3, 7, 1, 5, 8,2, 4,6)

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