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Computer full notes of class 11 chapter 1


Computer full notes of class 11 chapter 1
Fill in the blanks with the correct words:
1 = merges , 2 = data , 3 = directions or supervision , 4 = oriented , 5 =
1024 , 6 = F = byte , 7 = main , 8 = magnetic , 9 = cyclic , 10 = design
Computer full notes of class 11 chapter 1 MCQS end.

Short plus long questions

Question 1 Answer. Information Technology: Information technology is that
field of study which deals with storage of data, its processing which results in the production of information, and its transfer from one place to another through computer.
So information technology is the combination of computerscience, business and communication.
Importance or role of information technology:
Information technology plays an important role in our life. It si related to every field of our life such as education, health, banking, business, industries, defense, science and engineering, research , hoteling , communication , ticket reservation , entertainment etc.

Question 2 Answer. Main components of computer: A computer consists of
two main components one are called hardware and the other called software.
Hardware: It is that component of a computer which can be touched and seen directly. So , hardware is the physical component of a computer system. Some common examples of hardware are keyboared, mouse, printer, processor etc.
Software: It is that type of component of a computer which can not be touched and seen directly So, it is the non-physical component of computer system. Common examples of software are Windows, Microsoft office etc software are of two types one is, Application software and the other is System software.

Question 3 Answer: The complete block diagram of a typical computer
system is shown below:

block diagram of computer
Question 4 Answer: System software: System software are those computer programs or software which drive, manage, control and monitor the hardware. So they bring the hardware to a working condition. System software also translate the application program into machine language and run it through processor.
Example: Operating system such as windows and translators such as compiler and interpreter.
Application Software: Application software are those software or programs which are written to solve user problems or organization. It may be noted that a single application software can not be able to solve every problem. Examples: Ms-word , Ms- Excel , Ms power point , internet download managers , media players etc.

Question 5 Answer: Data: The collection of facts and figures which are not in organized form is called data.
The raw form of information is called data.

Information: The facts and figures which are in organized form is called information.
The process data is called information.

Computer program: It is a set of instructions which the computer follows to solve a problem or to do a useful task. It is also called software.

Operating system: It is a system software that makes the hardware and other software functional. without operating system, it is not possible for a user to work on computer system. It is the first software which is installed on a newly bought computer system.
Examples: Dos, Windows, Unix, Linux etc.

Input devices: Any thing through which we can enter data in to a computer system is called input devices. Examples: Keyboared , mouse etc

Output devices: Any thing through which we can get information from a computer system is called output devices. Examples: Monitor , Printer etc.

Question 6 Answer: Memory: It is that part of computer where data and programs are stored.
Types of memory: There are two types of memory:
1 – Main memory or primary memory
2 – Secondary memory or Auxiliary memory

Main memory: Main memory is directly connected to processor. In other words we can say that it is online to processor. Due to this reason it is faster in speed than secondary memory. It’s speed of accessing and storage is faster however it has limited size and hence can store limited amount of data.
Main memory is also called internal memory. It s further divided into two types which are RAM and ROM.

Secondary memory: secondary is not directly connected to processor. In other words we can say that it is offline to processor. It is connected to processor through “RAM”. Due to this reason it is slower in speed than main memory. It’s speed of accessing and storage slower. However it has a large size and hence can store a huge amount of data as compared to main memory. So the main purpose of secondary memory is to increase storage capacity.

Question 7 Answer: Explaination of RAM and ROM.
RAM: RAM stand for ‘Random Access Memory’. IT is temporary or volatile memory because when the computer is Switched OFF the contents of RAM get lost. RAM store / contains those data and programs which are being processed or which are to be processed when the processor becomes free. We can read data from RAM is well as write data in to RAM. Due to this property RAM is also called Read-Write memory. It is so called Random Access Memory because its each location can be accessed randomly. RAM is further sub divided into two types which are SRAM (Static RAM) or DRAM (Dynamic RAM).

ROM: ROM stand for ‘Read Only Memory’. ROM is the second type of main memory. It is permanant or non-volatile memory because when computer Switched OFF the contents of ROM do not get lost. The contents of ROM are special programs which are used in the ‘booting process’ of computer. These programs are called’boot strap routines’ which are frequently required. We can only read data and programs from ROM. We can not write our data or programs into ROM by simple technique. Due to this property it is called Read only Memory. Also we can not delete and modify its contents. ROM is further sub divided into four types which are:
Flash Memory
(Note we will discuss all of these ROM types in upcoming chapters)
Computer full notes of class 11 chapter 1 questions end.
Keep reading jump to chapter 2.

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