CLASS 6 Ch-1 (Computer An Overview)

Class- 6

Ch-1 (Computer An Overview)

Differentiate-

A.PRIMARY MEMORY-Primary memory is the area in which data is stored by CPU for processing.

SECONDARY MEMORY- Secondary memory is used to store large amount of data and is non volatile in the nature.

B.VOLATILE MEMORY -Volatile memory is a memory that losses its contents when the computer or hardware device loses power.

NON VOLATILE MEMORY- Non volatile memory is a memory that keeps it contents even if the power is lost.

C) ROM- ROM stands for the Read Only Memory, the memory from which we can only read but cannot write. ROM is considered non-volatile memory.

RAM- RAM stands for Random Access Memory. This is used in computer system as the main memory. RAM is considered volatile memory. 

Answer the following questions.

a)Define Computer.

Computer is a Programmable electronic device that processes data under our instructions to give the desired output.

b)Name the three components of CPU. Explain briefly about each of them.

Three components of CPU are-

1. ALU- It performs the arithmetic and logical operations.

2. Memory unit- This unit can store instructions, data and intermediate results.

3.Control unit- This unit controls the operations of all the parts of computer.

c)What do you understand by the term 'Computer Memory'?

Computer memory is any physical device that is capable of storing information temporarily or permanently.

d)What is Primary Memory and what is its utility?

Primary memory is known as main storage or internal memory.

It is used by the CPU to keep copies of files, programs and other temporary information.

e)What is Secondary memory? Explain the advantages of using it.

It is actually storage media or the device where software and data can be stored on a permanent basis. The data on it stays there until it is deleted or overwritten by the user.

f) Write a short note on ‘Hard Disk’.

It is primary device for PC’s and also known as fixed disk.

It can hold large amount of data and information which is permanent unless the hard disk is damaged or user instructs to delete it.

g)Write a short note on ‘Blu‐ray Disk’.

Blu‐ray (BD) is the name of a new optical disc format that offers more than five times the storage capacity of a traditional DVDs.

h) What is Cloud Storage? Explain its advantages.

Cloud storage is a term that refers to online space that you can use to store your data.

Advantages-

1.  Once backed up, your files can be accessed whenever you need them, anywhere in the world.

2.  Risks of losing important files and information are less.