Important
Questions
1. What is a computer
?
Ans
- A computer is a programmable electronic device that accepts row data as input
and processes it with a set of instructions (a program) to produce the result
as output. it renders output just after performing mathematical and logical
operations and can save the output for logical.
2. Name the super
computer developed in India ?
Ans
- Name the super computer developed in India is Param.
3. What is the
function of memory?
Ans
- The memory temporarily store the data and information during processing.
4. What is the
difference between RAM and ROM ?
Ans-
|
RAM |
ROM |
|
a) definition of RAM is
random access memory. |
a) Definition of ROM is
read-only memory. |
|
b) Random access memory
is expensive when compared to RAM. |
b) ROM is cheaper when
compared to ROM. |
|
c) The speed of random
memory (RAM) is higher when compared to RAM. |
c) The speed of read-only
memory (ROM) is slower when compared to ROM. |
|
d) Random access memory
RAM has a higher capacity when compared to ROM. |
d) ROM has a lower
capacity compared to RAM. |
|
e) Data in RAM can be
modified, erased or read. |
e) Data in ROM can only
be read, it cannot be modified or erased. |
5. What is CPU ?
Ans
- A central processing Unit or CPU, is functionally the most important
component of a computer system. Without a CPU, any computer is more or less
non-functional. it is generally referred to as the 'brain' of the computer due
to the vast number of functions it performs.
6. What are the
comments in c++?
Ans
- A comment is text that the compiler ignores but that is useful for
programmers. Comments are normally used to annotate code for future reference.
The compiler treats them as white space. You can use comments in testing to
make certain lines of code inactive. In C++ there are two ways to add comments.
//single-line comment /* Multiple line comment */
7. What is
declaration of variable ?
Ans
- A variable declaration provides assurance to the complier that there exists a
variable with the given type and name so that the complier can proceed for
further compilation without requiring the complete detail about the variable.
Example
- int Result;
char
c;
Int
a,b,c;
8. Difference between
for loop and while loop?
Ans-
|
For loop |
While loop |
|
a) Iterates for a preset
number of times. |
a) Iterates till a
condition is met |
|
b) It is normally used
when the number of interations is known. |
b) It is normally used
when the number of interations is unknown. |
|
c) Condition is a
relational expression. |
c) Condition may be
expression or non-zero value. |
|
d) For is entry
controlled loop. |
d) While is also entry
controlled loop. |
9. What is Desktop ?
Ans
- A desktop is a computer display area that represents the kinds of objects one
might find on top of a physical desk, including documents, phone books,
telephone, reference sources, writing and drawing tools and project folders.
10. What are the
difference between hardware and software ?
Ans-
|
Hardware |
Software |
|
a) Hardware is a physical
parts of the computer. |
a) Software is a program
which is executed by CPU. |
|
b) It can be touched. |
b) It can't be touched. |
|
c) When damaged, it can
be replaced with a new component. |
c) When damaged it can be
installed once more using a backup
copy. |
|
d) Hardware cannot be
infected by viruses. |
d) The software can
be infected by viruses. |
|
e) Developed using
electronic and other materials. |
e) Developed writing
using instruction using a programming language. |
11. What is data?
Ans. A data is a collection of raw, facts
and figures. Which has no meaning is called data. Such as numbers, text, audio,
video, images, etc.
12. What are the major strengths and weaknesses of computer?
Ans. Strengths of Computer:
1. Speed
2. Diligence
3. High Storage Capacity
4. Accuracy
5. Versatility
weaknesses of computer:
1. Decision
2. Health
3. Maintenance.
13. What is information?
Ans. When data is processed, organized,
structured, or presented in a given output result. To make it more useful and
meaningful is called information.
14. Name the super computer developed in India.
Ans. Name the super computer developed in
India is Param.
15. What is volatile memory?
Ans. RAM is known as volatile memory
because when we switch off the computer its data lose.
16. Define input device. Give examples.
Ans. Any device using which we can give
input to the computer is called input device. The input device create a link
between the user and computer. Examples: Keyboard, Mouse, Web-cam, Scanner,
Joystick, Microphone, Digital camera, Light Pen Modem etc.
17. What functions are performed by the ALU?
Ans. ALU stands for "Arithmetic
Logic Unit" which is performed all mathematical calculations of the
computer.
18. What is the function of memory?
Ans. The memory temporarily store the
data and information during processing.
19. Define flow chart.
Ans. The graphical representation of
algorithm is called flow chart.
20. Define application Software. Give examples.
Ans. Application software is used by the
users to perform specific tasks is called application software. These software
full fill the needs and requirements of the user. Examples: MS Word, MS Excel,
Tally, Photoshop, Game and Google Chrome etc.
21. Define antivirus.
Ans. Antivirus is a software, also known
as anti-malware, is a computer. Antivirus software is originally used to detect
and remove computer viruses.
22. What is language processors? Types of processors.
Ans. Language processors is also known as
language translator. It is a software that converts human understandable
language into machine language. There are three types of language processors:
Assembler, Interpreter and Compiler.
23. What are difference between source code and object code?
Ans.
|
Source Code |
Object Code |
|
1.Source code is a
program written in high Level language. |
1.Object code is a
program in machine language. |
|
2.It is human readable. |
2.Computer understand
object code directly. |
|
3.Source code is generated
by human. |
3.Object code is
generated by computer. |
24. What is booting? Give examples and explain.
Ans. When we start our computer then
there is an operation which is performed automatically by the computer is
called booting.
Example of booting: Cold booting and warm
booting.
Cold booting: When we turn on the
computer after switched off is called cold booting.
Warm booting: When we reset the computer
by pressing reset button is called warm booting.
25. What is an operating system? What are its functions?
Ans. An operating system is the most
important system software. It manage all hardware & software, input, output
and processing activities within the computer system. Without operating system
cannot do anything work. When a computer is switched ON, the operating system
is the first program that is loaded onto its memory.
26. Define utility software? Give examples.
Ans. Utility software is system software
that helps to maintain control the proper and smooth functioning of the
computer system. It is used to performing housekeeping functions like backup,
cleaning viruses and arranging information etc.
Examples of utility software are:
Antivirus, Compression Tools, File
Management Tools, Disk Management Tools