Class 7 Chapter 1 introduction to the computer

a. Define the computer with its working principle.

Ans: A computer is an electronic device that can perform a variety of operations with a set of instructions. Input-Process- Output and storage is the basic working principle of a computer. 

b. What are the functional units of the computer.

Ans: The functional units of the computer CPU can be divided into three sections they are Arithmetic Logical Unit (ALU), Control Unit (CU), Memory Unit (MU)

c. Mention any four advantages and disadvantages of a computer.

Ans: Advantages of computers are given below:

i) We can work fast and easily.

ii) It is possible to store a large volume of data.

iii) The output of the computer is always correct.

iv) A computer can work for a long time.

 Disadvantages of computers:

i) A computer is useless without electricity.

ii) It may create health problems.

iii) A computer cannot work itself.

iv) It does not have its own decision-making capacity.

d. Write any six application areas of the computer.

Ans: Any six application areas of the computer are given below.

i) Computer in Education.                  ii) Computer in Bank  

iii) Computer for entertainment.        iv) Computer at the hospital.

v) Computer in Business                   vi) Computer in Communication

e. List out the different characteristics of the computer.

Ans: The different characteristics of a computer are: Speed, Accuracy, Diligence, Versatility, Storage, etc. 

f. What is the role of the computer in communication?

Ans: The computer plays a very important role in communication, the internet and email are used to exchange data these days. Social networking sites like Facebook, Twitter, Viber, Tiktok, etc are being used these days to exchange information very easily. 

g. Why are computers popular in the banking sector?

Ans: Computers are popular in the banking sector to keep the records of customers, check their balances, verify their signatures, and deposit and withdraw money, online banking, ATM service etc. 

h. Name any three social networking websites.

Ans: Facebook, Tiktok, and Youtube are examples of social networking websites.

i. Why is the computer called a versatile machine?

Ans: Computers can perform completely different types of work. It can be used in different fields for various purposes like in education, communication, bank, etc,  So computers are called versatile machines.

j. Define the following terms:

a. Input: Input is the act of entering the data or instructions into the computer with the help of input devices.  

b.  processing: When a computer gets the input then it starts to convert raw data into meaningful information called processing.

c. Output: After processing raw data computer is used to give or display meaningful information or result called output.

d. Storage:  The storage devices are capable of holding information or result either permanent or temporary. Example Harddisk, RAM, Pendrive, etc.