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Learn TET MCQs with answers [Page 18 of Department 57]
171) The IC chip, used in computers, is made of _______
(A) Silica
(B) Iron Oxide
(C) Chromium
(D) Silicon
Correct Answer - Option
(D)
Explanation :
An integrated circuit (IC) is a microscopic array of electronic circuits and components diffused or implanted onto the surface of a single crystal, or chip, of semiconducting material such as silicon. It is called an integrated circuit because the components, circuits, and base material are all made together, or integrated, out of a single piece of silicon.
173) A difference between a worm and a virus is that _________.
(A) Viruses expand the master boot record.
(B) A worm cannot harm a computer like a virus can.
(C) A virus must be attached to a carrier
(D) Worms run faster than viruses
Correct Answer - Option
(C)
Explanation :
Computer worms are similar to viruses in that they replicate functional copies of themselves and can cause the same type of damage. In contrast to viruses, which require the spreading of an infected host file, worms are standalone software and do not require a host program orhuman help to propagate. A virus must attach itself to a program or document and is spread by traveling with the carrier. A worm, however, can travel by itself (Security Awareness: Applying Practical Security in Your World By Mark Ciampa).
The presentation layer presents data to application layer in format that can be procured by an end user. This is actually a translator that provides coding and conversion functions. Main tasks are data compression, decompression, encryption and decryption.
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