A. Multiple Choice Questions:
1. A CPU does not consist of......................
a. ALU
b. HDD
c. CU
d. MU
Ans. b. HDD
2. One TeraByte is equal to......................
a. 1024 Megabyte
b. 1024 Gigabyte
c. 1024 PetaByte
d. 1024 KiloByte
Ans. b. 1024 Gigabyte
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
B. State True or False:
1. A microprocessor chip contains millions of transistors.
Ans. True
2. The output can only be in the form of a hard copy.
Ans. False
3. The speed of a CPU is determined by the number of instructions it executes per second.
Ans. True
4. AC, DR, AR, and PC are types of Registers.
Ans. True
5. The printed information on the paper is called a soft copy.
Ans. False
C. Answer the following
1. What is the function of a CPU?
Ans. CPU is the main unit of a computer. It controls all the internal and external devices of a computer and performs arithmetic and logical operations. The function of the CPU is to read, interpret and process the information and instruction.
2. What are the components of the CPU? Explain them briefly:-
Ans.
1. (ALU) Arithmetic and logical unit- ALU is the component of the CPU, which performs the arithmetic and logical operations on the operands.
2. (CU) control unit- This unit controls the operation of every other component of a computer system. It also controls the transfer of data
and instructions on a computer. It is also called the central nervous system of the computer system as it manages all other units.
3. (MU) Memory unit- The memory unit is the principal storage of the computer. It stores both the data and the instructions. The MU is linked
with other parts of the computer and sends them the data when needed.
3. What is 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.
Some of the most commonly used registers are:- Accumulators (AC)
Data Register (DR) Address Register (AR), Program Control (PC).
4: What is the difference between RAM and ROM?
Ans.
| Differences between RAM and ROM | |
|---|---|
| RAM | ROM |
| RAM stands for Random Access Memory memory | ROM stands for Read-Only memory. |
| RAM data is volatile. Data is present till the power supply is present. | ROM data is permanent. Data remains even after the power supply is not present. |
| Ram data can be read, erased, or modified. | ROM data is read-only. |
| RAM is used to store data that the CPU needs for current instruction processing. | ROM is used to store data that is needed to bootstrap the computer. |
5. What are the various units of memory?
Ans. A computer stores and processes data or information in the form of binary numbers. The smallest unit of memory is Bit. Some of the units of memory are: -
Nibble- Group of 4 bits
Byte- Group of 8 bits
kilo Byte- 1kb = 1024 bytes
MegaByte- 1 MB = 1024 KB
GigaByte- 1GB= 1024 MB
TeraByte- 1TB = 1024 GB
Peta Byte- 1PB = 1024 TB
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