A. Tick P the correct alternative:
1. All
important parts of computer are fitted in :
(a)
System Unit
(b) Power Supply Unit
(c) CPU
(d) Expansion Slots
2. Random
Access Memory is used to store data :
(a) Permanently
(b) Temporarily
(C) Long Time
(d) All
3. The
fastest component of a computer is :
(a) Motherboard
(b) CPU
(c) ROM
(d) RAM
4. It is
having the highest storage capacity :
(a) Optical Disk
(b) Hard Disk
(c) Blu-ray Disk
(d) RAM
5. Due to
this the system clock is always running even when computer is off:
(a) Motherboard
(b)
Power Supply Unit
(c)
Battery
(d) CPU
B. Write ‘T’ for true and 'F' for false statement:
1. An
expansion slot is a place on the motherboard where an expansion card may
be
fitted. True
2. The CPU
is the fastest component of the computer. True
3. Battery
gives the power to CPU. False
4. Floppy
disk drives are the fastest type of disk drive. False
5. Peripherals
are connected to the system unit via ports. True
6. ROM is a
permanent memory. True
7. Hard disk
is the permanent storage of the computer. True
8. Fiber glass does not allow the flow of electric current. True
C. Fill in the blanks:
1. Motherboard is also called main board.
2. Due to battery the clock of the computer is always running.
3. Mother board is a plate of fiber glass.
4. Main memory is a temporary storage.
5. Central processing unit is the heart of the system.
6. Sound card converts digital data into an analog signal.
7. Transistors consume very little electricity and generate very low heat.
8. Power supply unit converts domestic high voltage current into low voltage current.
D. Matches the following:
1. RAM à temporary memory
2. ROM à permanent memory
3. CU à controls all work done inside the computer
4. ALU à calculations and comparisons
5. Blue-Ray disk drive à emerging disk technology
6. Hard disk à storage for data and programs
7. Motherboard à main board
E. Answer the following questions:
Ques 1. Give a brief description of motherboard?
Ans: It is a plate of fibre, a printed circuit board on which all electrical circuits are printed. All peripherals are connected through expansion slots.
Ques2. What is the role of power supply unit?
Ans: It converts domestic high voltage current into low voltage suitable for the computers.
Ques3. Describe main memory?
Ans: The processor interacts with main memory only while processing instructions.
Ques4. What are the two main parts of CPU?
Ans: CPU has two main parts:
1. Control unit (CU)
2. Arithmetic and Logic Unit (ALU)
Ques5. Describe hard disk drive.
Ans: It provides convenient persistent storage for data and programs. Information will survive when the power of the computer is turned off.
Ques6. Why do you use video and sound card?
Ans: Video card is used to generate a digital representation of an image and store into video memory where as sound card converts digital data into an analog signal which is used in speakers and headphones.
Ques7. What do you understand by integrated circuits?
Ans: It is a small chip made of silicon or other semi-conductor material consist of electronic components which make the way for the electric current.s
Ques8. What is the role of battery in system unit?
Ans: Battery gives power to the clock of system unit.
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