Tuesday, March 17, 2009

Facts About Computer and Programming

  • Most applications in a data warehouse consists of transactions.
  • A Transaction consist of one read and write operation.
  • For security purpose we use proxy server along with firewall.
  • Rollback command undo all changes of a transaction.
  • Applet is a dynamic document application program.
  • The speed of a Super Computer is mainly measured in FLOPS.
  • RAID 3 is a single parity drive depends on disk controller for finding out which disk has failed.
  • Propagation time is the time which takes by a signal to transmit from one point of a medium to other end.
  • Sliding window protocol is used in data link layer to store the information about frame sequences and respective acknowledgement.
  • archie is a program to find files in ftp site.
  • website to get kernel source code http://lxr.free-electrons.com/source/
  • The linux kernel mailing list http://www.tux.org/lkml/#s15-3
  • static library has extension .a and dynamic library has .so.
  • files which shown in colors in linux require permissions.
  • ./ is the relative path and starts with / is called absolute path.

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