Functioning of Computer Lesson-2
Fill in the Blanks
- is the process of entering Data and Instructions to the computer.
- Input Devices (2) Output Devices (3) CPU (4) None of these
- The process of saving data and instructions permanently is known as …….
- Input (2) Storage (3) Processing (4) Output
- The process of producing results from the data for getting useful information is called
- Input (2) Output (3) Processing (4) None of these
- Primary storage is also known as. Memory.
- Secondary (2) Main (3) Auxiliary (4) All of these
- Secondary storage is also called. storage.
- Secondary (2) Main (3) Auxiliary (4) all of these
Write down True or False:
- A computer is an electronic machine. (True)
- The Process of entering data and programs into the computer is called Output. (False)
- Intermediate results of processing are stored in Storage. (True)
- A super computer is most powerful computer. (False)
- Memory is of two types : Primary Memory and Secondary Memory. (True)
Short Answer type Questions :
Q 1. Draw the diagram of basic functions of a Computer.
Ans:
Q 2. Draw Block Diagram of C.P.U. and name three parts of it.
Ans:
Q 3. Define memory and name of two types of memory.
Ans: 1. Primary Memory
- Secondary Memory
Q 4. Differentiate between Primary memory and Secondary memory.
Ans:
Primary Memory |
Secondary Memory |
1. It is called main memory. |
1. It is called auxiliary memory. |
2. It stores data temporary. |
2. It stores data permanently. |
3. It has limited storage. |
3. It has large storage. |
4. It is very expensive. |
4. It is not so expensive. |
5. It is not easily portable. |
5. It is easily portable. |
Q 5. Describe about Laptop.
Ans: It is a portable PC. It is light weight and small. Laptop has a battery and charger. A person can carry a laptop.
Q 6. What is Tablet?
Ans: It is a very thin portable computer. It is usually battery-powered. It has a touch screen as input device.
Long Answer type Questions:
Q 1. What are the basic functions of a Computer?
Ans: 1. Input : The process of entering data and programs in to the computer system.
- Storage : The process of saving data and instructions.
- Process : The process of performing operations on data and instructions.
- Output : The process of producing result from data and instructions.
Q 2. Describe Primary Memory?
Ans: It is called main memory.
- It stores data temporary.
- It has limited storage.
- It is very expensive.
- It is not easily portable.
- Examples: RAM, ROM
Q 3. Describe secondary memory?
Ans: It is called auxiliary memory.
- It stores data permanently.
- It has large storage.
- It is not so expensive.
- It is easily portable.
- Examples: CD, DVD
Q 4. Describe Control Unit.
Ans: The control unit is also called central controller. It directs the various components of a computer.
Basic functions are
- To read the code.
- To decode the numerical code.
- To provide the data to an ALU.
Q 5. Describe A.L.U.
Ans: An arithmetic logic unit (ALU) performs arithmetic and logical operations.
Operations:
- Arithmetic operations (for example : addition, subtraction, multiplication and division).
- Bitwise logic operations (greater than, smaller than, equal to)
Q 6. Describe Microcomputer.
Ans: Microcomputers are the most common type of computers. These Computers are used at school or at home.
Examples 1. Laptop
-
- Notebook
- Tablet
- Palmtop
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