What is CD-ROM ? Advantages or Disadvantages of CD-ROM

• CD-ROM (Compact Disk – Read Only Memory) is a non-erasable backing store which can hold large amounts of data.
• It’s a shiny silver colour metal disk of 5 ¼ inch and the storage capacity about 650megabytes.
• Large volume production is achieved by automated processes similar to that of audio compact disks.
• Many of today’s micro-computers come with CD-ROM readers and as a result, CD-ROM is popularly used for
• distribution of software, digitized graphic images as well as Multi-Media material.
• Information is written on the disk surface by shining a laser beam.
• As a disk rotates the laser beam traces out a continuous spiral.
• It’s known as WORM (Write Once Read Many) disk technology.
• The data can be read time and again but, once the data is stored, it cannot be erased or changed.

Advantages of CD-ROM:

• Cost per bit is Low.
• Need not have any mechanical read/write heads to read/write data.
• Compact in size.
• Light weight

Disadvantages of CD-ROM :

• Read only storage medium.
• Slower access speed than magnetic disk.

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Basic Computer Questions

Q : The main system board of the computer is called ____.
(A) Motherboard
(B) Processor
(C) Microchip
(D) None of these

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Q : Which of the following system components is the brain of a computer?
(A) Circuit board
(B) CPU
(C) Memory
(D) Network card

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Answer ⇒ { B }

 
Q : What is the built-in permanent memory in a computer called?
(A) RAM
(B) ROM
(C) CPU
(D) CD-ROM

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Answer ⇒ { B }

 
Q : Which of the following is the full form of NTFS?
(A) New Tree File system
(B) New Technology file system
(C) New Table file system
(D) Both B and C

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Answer ⇒ { B }

 
Q : Which of the following is not a hardware processing chip ?
(A) Processing chip
(B) printer
(C) mouse
(D) Java

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Answer ⇒ { B }

 
Q : The monitor of a computer is-
(A) storage device
(B) processing device
(C) input device
(D) output device

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Answer ⇒ { D }

 
Q : Which protocol does Ping use?
(A) TCP
(B) ARP
(C) ICMP
(D) BootP
(E) None of these

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Answer ⇒ { C }

 
Q : If you wish to extend the length of the network without having the signal degrade, you would use a ___.
(A) Gateway
(B) Router
(C) Modem
(D) Repeater
(E) Resonator

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Answer ⇒ { D }

 
Q : A series of instructions that tells a computer what to do and how to do it is called a ______.
(A) program
(B) command
(C) user response
(D) processor
(E) None of these

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Answer ⇒ { A }

 
Q : Verification of a login name and password is known as_____.
(A) Configuration
(B) Accessibility
(C) Authentication
(D) logging in
(E) None of these
Answer ⇒ ??