COMPUTER SYSTEM ORGANISATION-CLASS-11-CHP-01-CBSE-Objective type questions, Extra solved questions relating chapters, Important unsolved questions for practice

   COMPUTER SYSTEM ORGANISATION 

OTQs (objective type questions)

1. Which of the following components is the main memory of computer?

(a)   CD

 (b) Internal hard drive 

(c)  DVD

(d)  RAM

ANSWER-  (d) 

2. Which component of a computer connects the processor to the other hardware?

(a) System bus 

(b) CPU 

(c) Memory

(d) Input unit

ANSWER- (a) 

3. Which of the following is refer to the brain of computer?

 (a) Processor 

(b)  RAM

(c)  ROM

 (d)  Hard drive 

ANSWER- (a) 

4. What is the name of the program that control the computer system?

 (a) Hardware

 (b) keyboard 

(c) software 

(d) Mouse

ANSWER- (c)  

5. The physical components of a computer are called?

(a) Hardware 

(b) Software 

(c) ALU

(d) CPU

ANSWER- (a)  

6. Which of the following is the common measurement of unit of Computer memory?

 (a) IQ

 (b) Byte

 (c) TeraByte

 (d) GigaByte

ANSWER- (c) and (d) 

7. What is the name of the component that used to both read and write data?

 (a) ROM

(b)  RAM

(c) Hard drive 

(d)  cache memory 

ANSWER- (b) 

8. The CPU is also known as

 (a) The brain

 (b)  The processor

 (c)  The central Processing Unit

 (d) All of these

ANSWER- (d) 

9. Which Smallest unit of the CPU directs and co-ordinates all activities within it and determine the sequence in which instructions are executed, sending instructions sequence to other smaller unit.

(a)  CU

(b) ALU

(c) Processor 

(d) All of these 

ANSWER- (a) 

10. Which smaller unit of CPU performs all arithmetic and logic functions in a computer?

(a)  CU

(b) ALU

(c)  Processor 

(d) All of these 

ANSWER-(b) 

11.  Component of CPU which is responsible for comparing the contents of two pieces of data is

(a) ALU

(b) CU

(c) memory 

(d) registers

ANSWER-(a) 

12. In a computer CPU stands for 

(a) control unit

 (b) cache unit 

(c) calculating unit 

(d) communication unit

ANSWER-(a) 

13. Arithmetic and logic unit along with control unit of a computer combined ,into a single unit, is known as

 (a) central Processing Unit

 (b) Memory unit

 (c) operating unit

 (d) I/o unit

ANSWER- (a) 

14. Word processor and desktop publishing programming are examples of

 (a) hardware

(b)  software 

(c) CPU 

(d) none of these

ANSWER- (b) 

15. Operating system is an example of

 (a)  Application software

 (b) System software 

(c) utility program

 (d) none of these

ANSWER- (b) 

16. Disk Fragmentor  is an example of

 (a) application software

 (b) system software 

(c) utility program 

(d) none of these

ANSWER- (a) 

17. Flash memory and blu-ray disc are examples of 

(a)  Hardware 

(b)  software

 (c) CPU 

(d) none of these

ANSWER- (a) 

18. Flash memory is a type of

 (a) primary memory

 (b) RAM

 (c)  Secondary memory

 (d) All of these 

ANSWER- (c) 

19. Which of the following memory types will store the data information permanently 

(a) RAM

 (b) cache

 (c) Flash Memory

 (d) hard disk 

ANSWER- (c) 

20. Which of the following memory types cannot store the data or information permanently 

(a) Ram 

(b) cache

 (c) Flash Memory

 (d) hard disk 

ANSWER- (d)  

SOLVED QUESTIONS RELATING CHAPTER

Q. 1. State the basic units of the computer. Name the subunits that make up the CPU and give the functions of each of the units.

Ans-  The basic units of a computer are-

1. Input unit   2. CPU.  3.Output unit. 4. Memory.

CPU has two subunits- the control unit(CU) and arithmetic logic unit (ALU).

 The control unit controls the entire operation being carried out whereas the ALU performs the Arithmetic and logical operations.

 Q. 2. What is the function of memory? what are its measuring units? 

ANS- The memory temporary hold the data and  information during processing.

The smallest unit of memory is a byte(8 bits).  A byte can store  one character in binary form Other measuring units are KB equal to 1024 bytes ,MB equal to 1024 KB, GB equal to 1024 MB and TB equal to 1024 GB.

Q. 3. Give examples for each of system software and application software. Explain the function of each type.

ANS- Examples of system software are-

1. Operating system  2. Language processor 

3. Application software 

Examples of operating system- single user OS, multiprocessing OS,  etc. 

As the name suggests, single user OS support single user whereas multi user OS can support multiple users. The batch processing OS processes the batches of jobs and multiprocessing OS is capable of handling multiple CPUs at the same time.

Example of language processes are- 

1. Interpreter. 2. Compiler 3. Assembler

An interpreter converts and execute an HLL program into object program line by line whereas, a compiler converts an HLL program into object program in one go and once the program is error-free, it can be executed later and assembler converts an assembly language program into project program.

Examples of application software-

1. Customised software

2. General software 

The customised software pertains to the requirements of a specific user for whom the software has been developed. General software is developed keeping in mind general specifications of a problem.

Q. 4 why is primary memory termed as 'destructive write 'memory but not 'destructive read' memory?

ANS- When a memory location is read from in the primary memory ,the contents of the memory word remain the same; they are not altered .Therefore a primary memory is termed as' non destructive read' memory since the read operation does not disturb the contents of a memory word.

When a write operation takes place  the previous content of the memory word are overwritten, Thus the primary memory is termed as 'destructive write ' memory as the write operation districts the contents of a memory word.

Q. 5. What is difference between RAM and ROM?

ANS- RAM refers to the Random Access Memory ,where both read and write operations can take place.  RAM is a volatile memory it contents are lost when power is turned off.

 ROM referred to read only memory where only read operation can take place . ROM is a non-volatile memory .

Both Ram and Rom are  parts of the primary memory.

Q. 6. What is cache memory? why is it considered crucial for a microprocessors performance?

ANS- Cache memory the special high speed memory that stores most recently used data in order to speed up the process of instruction execution . A cache can speed up data retrieval because recently used data is likely to be used again by the computer.

Q. 7. What is the role of CPU of a mobile system?

ANS-  A mobile system has to Cater to a variety of operations and applications and its CPU has to manage all these. Thus, the CPU of a mobile system has many sub processes that help it control and manage diverse applications . The CPU of a mobile manages all these types of applications and operations:

•  Manages Communications while connecting to radio transceivers and sim.
• Manages audio through ADC(analogue to digital converter) and DAC ( digital to analogue converter).
• Managers display and touch sensitive sensors and interface.
• Works in tandem with memory and storage.

Q. 8 what are various categories of software?

ANS-  There are broadly two categories of software:

1. System software-  This  type  software controls internal computer operations. The system software can further be classified into two categories:

1. Operating system-  An operating system is a program which acts as an interface between a user and the hardware.

2. Language processor - This program is responsible for converting an HLL code (high level language code )into machine understandable language.

2. Application software- An application software is the set of programs necessary to carry out operations for a specified application.

Q. 9 what is the difference between an interpreter and a compiler ?

ANS- An interpreter converts an HLL program into machine language line by line and simultaneously execute the converted line . Also and interpreter must always be present in the memory along with the program for its execution. If an error occurs in a line, the line is displayed and interpreter does not proceed unless the error is rectified.

A compiler converts an HLL program in machine language in one go . If there are errors in the program, it gives the error list along with the line number . Once the errors are remove error-free object code is made available and after this compiler is no more needed in the memory.

Q. 10. What is application software? why is it required?

ANS-  Application software is a software that pertains to one application .

Application software is required because system software cannot carry out the routine jobs performed by the user which application software can easily do.

To perform various kinds of activities ,the application software comes in various categories:

1. Packages

2. Utilities 

3. Business 

4. Developer tools. 

    

            IMPORTANT UNSOLVED        QUESTIONS FOR PRACTICE .........

1. Briefly explain the basic architecture of a computer.

2. What do you understand by input unit ?what is its significance? what does computer input consist of?

3. What is function of CPU in a computer system?  what are its subunits?

4. What functions are performed by control unit? can we call it control centre of computer system?why or why not?

5. What functions are performed by ALU? Is it an independent unit?

6. Distinguish between CPU and ALU

7. What is the function of output unit in a computer system ? Give examples of some output devices.

8. What role does memory plane functioning of computer system?

9. What is the meaning of term  volatile primary memory ? what can be done to overcome the problems of volatility? 

10. Distinguish between internal and external memory.

11. What is the role of memory in a computer functioning ?what types of memory does the computer work with?

12. What is cache memory? How is it useful?

13. What are major functional components of a mobile system?

14. Draw block diagram depicting organisation of a mobile system.

15. Discuss the role of utility software in the context of computer performance.

16. How is system software different from application software?

17. What does the communication processor do?

18. What is the utility of disk fragmentor?

19. How does display subsystem of a mobile system work?

20. What is the role of power management unit in a mobile system?