3i Infotech Papers: Sample Questions 1140 - 1141 of 1245

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Question number: 1140

» Operating System » Unix

MCQ▾

Question

The very first process created by the kernal that runs till the kernal process is halts is

Choices

Choice (4) Response

a.

getty

b.

init

c.

None of the above

d.

All of the above

Answer

c.

Explanation

  • Swapper is the first process created by kernel which in turn activates the init process.

  • Swapper is also known as scheduler.

  • While booting, special process called the ‘swapper’ or ‘scheduler’ is created with Process- ID 0.

  • The swapper manages memory allocation for processes and influences CPU allocation.

  • The swapper inturn creates 3 children:

    • The process dispatcher,

    • vhand and

    • dbflush

  • With IDs and respectively.

  • Dispatcher then spawns shell.

  • Unix keeps track of all the processes in an internal data structure called the Process Table.

Question number: 1141

» Basic CS » Networks

Essay Question▾

Describe in Detail

An IP/IPX packet is received by a computer having both IP/IPX. How is the packet handled.

Explanation

Understanding of IP/IPX protocol.

Understanding of IP/IPX Protocol.

Understanding of IP/IPX protocol.

  • Internetwork Packet Exchange/Sequenced Packet Exchange is a set of network protocols that provide packet switching and sequencing for small and large networks.

  • IPX works at layer three of the Open Systems Interconnection model and SPX works at layer 4.

    • IP, IPX is connectionless and contains end-user data, such as IP addresses.

    • IPX/SPX is compatible with local area networks (LAN) or private networks and different communication protocol functions.

    • SPX is connection-oriented and used for routing information and connection-related functions. Routing Information Protocol routes server information, which provides optimal data routing.

  • When the IP/IPX packet is received by a server, which can hander either, it read a field in the packet header to understand whether it is IP or IPX protocol.