Basic CS [3i Infotech Placement]: Sample Questions 215 - 216 of 243

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Question 215

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Describe in Detail

Essay▾

What is mutant?

Explanation

  • Mutant provides kernel mode or user mode in Windows NT, mutual exclusion with the notion of ownership.
  • Window NT is a Microsoft window personal computer operating system it is designed for users and businesses needing capacity.
  • The server is designed for business machines that need to provide services for network-attached computers.
  • Internal part of biology that mutation in a gene, it is possible to establish the normal function of the gene.

User Mode:

  • Executing code has no ability to directly access hardware or memory.
  • When run code in user mode delegate to system API to access hardware or memory.
  • The protection by this sort of isolation, crashes in user mode is always recoverable.

Kernel mode:

  • The executing code has complete and unrestricted access to the underlying hardware.
  • Execute any CPU instruction and reference any memory address.
  • Generally reserved for the lowest-level.

Question 216

Basic CS
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Describe in Detail

Essay▾

What does the protocol FTP do

Explanation

Define FTP Client on Client PC Conction to FTP Server
  • File Transfer Protocol is used for transmitting files over TCP/IP connections.
  • Relies on two communications channels between client and server.

Active and Passive connection mode:

  • In an Active FTP connection, the client opens a port and listens and the server actively connects to it.
  • In a Passive FTP connection, the server opens a port and listens and the client connects to it.

Active mode:

Understanding of Active Mode

For Active mode of connection firewall must accept connections to FTP client port.

Passive mode:

Understanding of Passive Mode
  • Use Passive mode to connect to an FTP server.
  • FTP servers support the Passive mode.
  • Passive FTP connection to succeed, the FTP server administrator must set firewall to accept all connections to any ports that the FTP server may open.

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