COMPUTER SYSTEM

Q1. What is a computer?

Ans. A computer is an electronic device, which can perform a variety of operations according to a set of instructions called program.

 

Q2. What is a computer program?

Ans. A computer program  is a set of instructions given to the computer to perform some operation(s).

 

Q3. What are the data?

Ans. Data are raw facts and figures.

 

Q4. What is the output of data processing system?

Ans. Data processing system transforms data into useful information.

 

Q5. What are the fundamental components of a computer system?

Ans. The four fundamental components of a computer system are:

1.  Input Unit
2. CPU (Central Processing Unit)
3. Internal Memory
4.  Output Unit

 

Q6. How are computers categorised?

Ans. Computers are categorised into these types:

Embedded Computer: These computers are embedded within the circuitry of appliances such as televisions, washing machines and wrist watches etc.

Programmable Computers: These types of computers can be uses as notepads, scheduling systems, address books, etc. With cellular phones, these connect to worldwide computer networks to exchange information regardless of location.

Laptop Computers and Personal Computers: These are typically used in business and at home to communicate on the computer networks, for word processing to track finances, to play games, etc.

Workstations: These are similar to PCs but have more capabilities. These are typically found in scientific, industrial and business environments that require high levels of computational abilities.

Mainframes: These are even more capable than workstations and can be used by multiple users.

Supercomputers: These are the most powerful computers that are used to process complex and time-consuming calculations. They are used by the largest business institutes, scientific institutions and the defence.

 

Q6. What are the functions of computer?

Ans. A computer, mainly, has four functions:

•  Accepts Data: Input
• Processing Data: Processing
• Produces Result: Output
• Stores Result: Storage

 

Q7. What are the characteristics of a computer?

Ans. Characteristics of The computer is followed:

1. Speed
2. High Storage Capability
3. Accuracy
4. Reliability
5. Versatility

 

Q8. Write the weakness of computer?

Ans.

1. Lack of Decision-Making Power: Computers cannot decide on their own. They do not possess this power which is a great asset of a human being.
2. IQ- Zero: Computers are dumb machines with zero IQ.
3. No Heuristics: Heuristics means learning from past experience. If a computer commits an error once and a similar situation occurs again, the computer will commit the same error again. It cannot learn from past experience. But human being beings learn from past experience very well.