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Q. What is
input device? Write any five devices.
Ans: Input
devices accept data and instructions from the user. These are the common used
devices:
1. Keyboard
2. Mouse
3. Light Pen
4. Scanner
5. Track Ball
Q. Define
keyboard and mouse as an input device.
Ans:
Keyboard: It is the most common input device. The most common keyboard use
QWERTY combination of keys. A standard keyboard has 104 keys. These are numeric
keys, arrow keys, special keys, alphabetic keys and function keys.
Mouse: A
mouse is an electro mechanical, hand held device and used as a pointer in a
computer system.
Q. Define
scanner and track ball.
Ans: A scanner translates
printed image into an electronic format that can be stored in a computer’s memory.
Some examples of scanner are:
1. OCR(Optical Character Recognition)
2. MICR(Magnetic Ink Character
Recognition)
3. OMR(Optical Mark Reader)
Track Ball: It is also printing device like mouse
but to move the pointer you have to rotate the ball with your thumb or your
fingers. Track ball is stationary and it can be place on any type of surface
unlike mouse.
Q. What is
output device? Write any five output devices.
Ans: Output
devices return the processed data as information, back to the user. Some common
output devices are:
1. Monitor
2. Printers
3. Plotters
4. Speakers
Q. Define
printer and some most common printers.
Ans: Printer
is a most common output device which prints the output on paper as desired.
Some of the most commonly used printers are:
1. Laser Printers: It is an extremely fast
and quiet Printer but costly. It produces High Quality print than any other
printer. The fastest laser printer can print up to 200 Pages/Minute in black and
white and up to 100 in colour.
2. Ink Jet Printers: Ink Jet printers
create image directly on paper by spraying ink by the tiny nozzles. The image quality
of inkjet is high but speed is low.
3. Dot Matrix Printers: It is the most popular
printer at one point of time. It is less expensive than any other printer but
it is very slower and produces lower print quality.
4. Line Printers
Q. Define
monitor and type of monitors.
Ans: It is the
most important output device also known as V.D.U.(Visual Display Unit).
Information processed within the CPU is needed to be visually displayed, in the
same manner as a television displays information, monitor uses the same
technique to display information as T.V. There are two types of monitors:
1. C.R.T.
2. L.C.D.
CRT: It stands for Cathode Ray Tube Monitor. It
is like typical monitor that looks like a T.V. screen. It has a large vacume
tube called cathode ray tube.
LCD: It stands for Liquid Crystal Displays
Monitor. It also called Flat Panel Monitor. These days LCD monitors are very
popular.
Q. What is
software? Identify the various types of software.
Ans: Computer
is a machine which cannot do anything without instructions from the user in
order to do any specific job you have to give a sequence of instructions the
computer. This set of instruction in a proper sequence is called a computer
program. Software refers to the set of computer programs that cause the
hardware(computer system)to function in
the desired manner. A complete set of instructions written to solve a problem
on a computer is called software.
Types of
Software: Computer software is normally classified into two broad categories:
1. System Software
2. Application Software
Q. What is
Assembly Language? Explain its advantages and disadvantages.
Ans: In the
1950s, to reduce programming complexity and provide some standardization,
assembly language were developed Assembly languages, also known as symbolic
languages using abbreviations or mnemonic code- codes more easily memorized to replace
the 0s and 1st of machine languages an assembly language program to
be executed, it must be converted to machine code. The assembly language
program to be executed, it must be converted to machine code. The assembly
language program is referred to as a ‘source program’ whereas the machine
language programs an ‘object program’.
Q. What is
High Level Language?
Ans: High Level
Language is almost English like language, used by human beings for writing
programs. These are easier to learn require less time to write programs, provide
better documentation and easier to modify.
The main advantages of high
level language its portability i.e., any high level language program can be
used and executed in almost all computers with little or no change.
A program written in high level language
is also called as source program and cannot be understood by the computer it
has to be translated in to machine understandable form.
Q. Write any
four example of High Level Language.
Ans: BASIC:
It stands for beginners all purpose symbolic instruction code. It is easy to
learn general purpose language like BASIC.
COBOL: It
stands for common business oriented language. It is used for commercial
applications.
FORTRAN :
It stands for formula translate. It is developed for solving mathematical and
scientific problems.
Q. What is
machine language?
Ans: It is
the lowest level of programming language, in which instruction is represented
in the form of binary numbers as ‘0 and 1’. Its execution is very fast and efficient
because the computer can accept the machine code as it is. A programmer must
keep track of a tremendous amount of details. It is very tedious and time consuming.
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Thanks for sharing the of 10th class operator and Basic of question answer.
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