3i Infotech Papers: Sample Questions 507 - 509 of 1245

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Question number: 507

» Languages » C & C Plus Plus

Short Answer Question▾

Write in Short

  1. main ()
  2. {
  3.     printf (“ ab”);
  4.     printf (“si”);
  5.     printf (“ ha”);
  6. }

Explanation

  • In a program = new line

  • = backspace

  • = linefeed or carriage return

Table shows the program

Table shows the program

printf (“ ab”);

First print to ab

printf (“si”);

Now the handle backspace

(NOTE: that even through it is “non-erase”, the next character to be output would overwrite what was backspaced over)

Now print asi

printf (“ ha”);

Now, a carriage return means to go back to the beginning of the line

So, the “ha” overwrites the “as” in “asi”

  • So, the answer is “hai”

Question number: 508

» Database » MySQL

Short Answer Question▾

Write in Short

What is VDL (View Definition Language)?

Explanation

  • This language is used to specify user views and their mapping to conceptual schema.

  • It defines the subset of records available to classes of users.

  • It creates virtual tables and the view appears to users like conceptual level. It specifies user interfaces.

Question number: 509

» Basic CS » Networks

Essay Question▾

Describe in Detail

What are the types of transmission media?

Explanation

Define Transmission media

Define Transmission Media

Define Transmission media

Two types of Transmission media:

  1. Wired or Guided Media or Bound Transmission Media
  2. Wireless or Unguided Media or Unbound Transmission media

Wired or Guided Media or Bound Transmission Media

  • Bound transmission media are the cables limited by the physical geography.

  • Popular bound transmission media include twisted pair cable, co-axial cable, and fiber optical cable.

  • Each has its own characteristics like transmission speed, effect of noise, physical appearance, cost etc.

    3 types of Guided Media:

  • Coaxial cable

    • Very common and widly used commutation media.

    • Named as it contains 2 conductors parallel to each other.

  • Twisted Pairs Cable

    • This is a most popular network medium.

    • Light weight, easy to install, supports many different types of networks.

  • Fiber Optics Cable

    • Previous ones used electrical signals to transmit data.

    • Fiber optics uses light- incredibly fast and high bandwidth

    • As light only moves in one direction- for two way communication a second connection is made between two devices

3 types of Guided Media

3 Types of Guided Media

3 types of Guided Media

Wireless or Unguided Media or Unbound Transmission Media:

  • Unbound transmission media transmit data without using any cables.

  • Media not bounded by physical geography.

  • Transmission is called Wireless communication.

  • Wireless communication is becoming popular.

  • Wireless LANs are being installed in office and college campuses.

  • This transmission uses microwaves, radio waves, or infra-red media.