Part – A (Employability Skills)

Unit -III (Information and Communication Technology Skills)

                                                              Chapter-8

                                    Components of Computer System

A.     Multiple Choice Questions.

1.      A CPU does not consist of______________.

a.      ALU               b. HDD                 c. CU                    d. MU

Ans b. HDD

2.One Tera Byte is equal to _________________.

a. 1024 Mega Byte          b. 1024 Giga Byte             c. 1024 Peta Byte             d. 1024 Kilo Byte

Ans b. 1024 Giga Byte

3. Which of these is not a peripheral device?

a. Register           b. Modem           c. Bluetooth        d. Printer

Ans a. Register

4. Control Unit is also called the _________ of a computer.

a. Central Digestive System                                        b. Central Respiratory System

c. Central Processing System                                     d. Central Nervous System

Ans d. Central Nervous System

A.     State True or False.

1.      A microprocessor chip contains millions of transistors. (  True        )

2.      The output can only be in the form of a hardcopy. (   False     )

3.      The speed of a CPU is determined by the number of instructions it executes per second. (  True    )

4.      AC, DR, AR, PC are types of registers. (   True   )

5.      The printed information on the paper is called a soft copy. ( False   )

B.     Answer the following Questions:

1.      .What is the function of a CPU?

Ans CPU is considered as the brain of the computer. It performs all types of data processing operations. It controls all the internal and external devices of a computer and performs arithmetic and logical operations. It controls the operation of all parts of the computer.

2.      What are the components of a CPU? Explain them briefly.

Ans There are three main components in a CPU.

1.      Arithmetic and Logical Unit (ALU)

2.      Control Unit (CU)

3.      Memory Unit (MU)

1.      Arithmetic and Logical Unit – It is a component of CPU, which performs the arithmetic and logical operations on the operands. The arithmetic operations are addition, subtraction, multiplication and division. The logical operations use the relational operators, like greater than (>), less than (<), greater than equal to (>=), less than equal to (<=), not equal to (<>) etc.

2.      Control Unit- This unit controls the operation of every other component of a computer system. It also controls the transfer of data and instructions among the various units of a computer. It is also called the nervous system of a computer system as it manages all other units.                                                                                                                                                                                                                                                                                                       

3.      What is a Register? Name some of them.

            Ans A register is a very small data holding place in a computer processor. It holds an instruction, storage address or data. There are various types of Registers performs a specific function.

Some most common registers are: Accumulator (AC), Data Register (DR), Address Register (AR), Program Control( PC)

4.What is the difference between RAM and ROM?

Ans RAM (Random Access Memory) is a type, of computer internal memory that can be accessed randomly. Whatever information whether as long as we enter into the computer goes into RAM and remains there as long as we are working on an application. It is a volatile memory as data and instructions are stored temporarily during its processing only and lost forever when the computer is switched off.

ROM – ROM stands for Read Only Memory. It is a type of memory from which information can only be read, whereas in a RAM, information can only be read from and also written to. It is a non -volatile memory, as it stores information permanently. Data stored in ROM can neither be modified nor removed. The primary use of ROM during the booting process. This is the initial program use to start a computer when power is turned on.

5.What are the various units of memory?

Ans