a. What is a computer? Write its major parts.
Ans: A computer is an electronic machine that accepts the data and instructions from the user, processes the data according to the given set of instructions, stores and gives the information (result).
System Unit, Monitor, Keyboard and Mouse are the major parts of computer.
b. Why is computer called Information Processing Machine?
Ans: A computer is called an Information Processing Machine (IPM) because it generates information by processing raw data according to a prescribed sequence of instructions.
c. Mention any four characteristics of computer.
Ans: High speed, Accuracy, Diligence and Versatility are the four characteristics of computer.
d. Write the uses of computer in the field of education.
Ans: Computers are used in education in classrooms, computer labs, online learning, distance education, making presentations, and using software for assignments and training (CBT and WBT).
e. What is meant by versatility in terms of features of computer?
Ans: Versatility in terms of features of a computer means its ability to perform different types of tasks quickly and efficiently. For example, a computer can be used to type documents, play games, browse the internet, and calculate data all at the same time or one after another.
f. List any four application fields of a computer.
Ans: Four application fields of a computer are:
- Education
- E-Government
- Health Care
- Science and Technology
g. What are the limitations of a computer? List in points.
Ans: The limitations of a computer are:
- Computer has no intelligence of its own.
- Computer cannot change processing steps itself.
- Computer lacks feeling.
- Computer cannot learn anything from the past experience.
h. List the abilities that every computer can perform.
Ans: Every computer is able to perform the following tasks:
- Accept the data and instructions from the user as input.
- Process the data according to the given set of instructions.
- Give the result of its processing for the user.
- Store the result permanently according to the requirement of the user.
i. Explain the phrase "Garbage - In - Garbage Out".
Ans: If input data is incorrect then the output will be incorrect or undesirable. In computer terminology it is called garbage-in garbage-out (GIGO)
j. Why are computers called diligent and versatile machines?
Ans: Computers are called diligent because they can work for long hours without getting tired or making mistakes. They do the same task again and again with the same speed and accuracy.
Computers are versatile as they can perform many tasks like typing, playing music, solving math problems, and designing pictures. Changing the program lets a computer do a completely new job.
k. Represent the measuring units of computer in terms of fraction of second.
Ans: Measuring units of computer in terms of fraction of second.
|
Unit of Time |
Meaning |
Part of Second |
Power of 10 |
|
Millisecond
(ms) |
One thousandth
of a second |
1/1000 |
10-3
Sec |
|
Microsecond
(us) |
One millionth of a second |
1/1000000 |
10-6
Sec |
|
Nanosecond
(ns) |
One billionth of a second |
1/1000000000 |
10-9
Sec |
|
Picosecond
(ps) |
One trillionth of a second |
1/1000000000000 |
10-12
Sec |
Long answer questions:
a. Describe any five modern application areas of computer.
Ans: Here is a brief description of five modern application areas of computers:
1. Education
Computers are widely used in schools and colleges for teaching through digital presentations, online classes, and educational software. Students use computers for research, assignments, and interactive learning.
2. E-Government
Governments use computers to provide online services like tax filing, issuing ID cards, and public information systems. It makes administration faster, more transparent, and easily accessible to citizens.
3. Health Care
In hospitals, computers help in storing patient records, scheduling appointments, and managing medical equipment. They are also used in diagnosing diseases, medical research, and telemedicine.
4. Science and Technology
Computers are essential in scientific research for simulations, data analysis, and experiments. They are used in space exploration, robotics, and developing new technologies.
5. Entertainment
Computers are used for watching movies, listening to music, playing games, and creating animations. They are also important in video editing, graphic design, and streaming platforms.
b. Explain all the characteristics of computer.
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