Solved Exercise:
Class-6, Chapter:- 1
A.
Multiple choice questions. Tick the correct
answer.
1. A computer is an ______________ device.
a. Machine b. electronic c. calculation d. mechanical
Answer: Electronic
2. Abacus, the first calculating machine, was developed in:
a. America b. London c. china d. japan
Answer: China
3. First- generation computers relied on ____________ coded language.
a. Binary b. digital c. read d.
write
Answer: Binary
4. The integrated circuit was invented in :
a. 1957 b. 1948 c. 1947 d. 1958
Answer: 1958
5. PARAM is the example of:
a. Minicomputer b. microcomputer c. supercomputer d. mainframes
Answer: Supercomputer
6. Barcode reader is used by a computer to _________ and identifies the
product or item code.
a. Scan b. print c.
tag d. delete
Answer: Scan
B.
Write T for true and F for false
statements:
1.
The word abacus was
derived from the Arabic word ‘abaq’. T
2. In about 1642 Pascal developed a calculator called the “Arithmatique”. T
2. In about 1642 Pascal developed a calculator called the “Arithmatique”. T
3.
A microcomputer is a
small, low-cost digital computer. T
4.
Laptops are not more
expensive as compared to desktop computers. F
5. CRAY-1 is the example of third generation. F
C. Fill
in the blanks:
1. ____________
played a key role in the development of logarithms.
Answer: Napier
2.
The invention of ____________ marked the start of the second
generation.
Answer: Transistors
3.
Handheld computers are also known as ______________ computers.
Answer: PDA
4.
An input device is any _________________ that sends data to the
computer.
Answer: Hardware
5.
The CPU is also known as _______________________.
Answer: Processor
6.
A group of 4 bits is called a ___________________________.
Answer: Nibble
D. Answer
the following questions in shot:
1. What is
computer?
Answer: Computer is an electronic
machine. It takes input from user and process it, after processing it gives
result also called output.
2. On which
code first generation computer relied?
Answer: First generation computer relied
on binary coded language.
3. What does
every computer contain?
Answer: Hardware and Software.
4. What is
input device?
Answer: An input device is any hardware
that sends data to the computer.
5. What is Bit?
Answer: A bit means a binary digit.
E. Answer
the following questions in detail:
1. Name the
computers used in different generations.
Answer:
First generation computers: ENIAC, EDVAC
and UNIVAC.
Second generation computers: PDP-8, IBM
1401 AND IBM 7090.
Third generation computers: NCR 395 AND
B6500.
Fourth generation computers: Apple II,
Altair 8800 and CRAY-I.
Fifth generation computer: Supercomputer.
2. Write a
short note on secondary memory of computer?
Answer: It is also known as auxiliary
memory. It is used for storing data or programs on a temporary or permanent
basic. Secondary memory refers to storage device. Examples flash drives, CDs
and DVDs.
3. What is
memory unit? Explain in brief.
Answer: Memory Unit is that part of the computer
where the data is stored and is accessible to CPU. The various measurement
units of computer memory are given here.
1.
Bit
2.
Byte
3.
Nibble.
4. Write the
difference between RAM and ROM.
Answer:
RAM memory:
1.
It is Random Access memory.
2.
It is a volatile memory.
3.
It helps the computer to boost up the processing speed.
4.
Range of RAM lies between 64 mb to 4 gb or more.
5.
It stores data temporary.
ROM memory:
1. It is called
read only memory.
2. It is a
non-volatile memory.
3. Data stored
in ROM cannot be deleted.
4. They are also called permanent storage memory.
4. They are also called permanent storage memory.
5. It store
data permanently.
5. Write the
difference between compilers and interpreter.
Answer:
Compiler: It is a program that translates
human readable source code into computer executable machine code.
Interpreter: This is a far faster process. It helps
programmer to edit and test their code quicker than using a compiler. The
drawback is that interpreted programs run much slower than compiled programs.
6. Write a
short note on Utility software and give its example.
Answer: Utility software is a computer
software designed to help in the management and tuning of operating systems,
computer hardware and application software. It is develop to perform a single
task or a multiple of small tasks.
Some other Links:
No comments:
Post a Comment