CBSE Class 9 Computer Applications 165 Chapter 4 Basic of Operating Systems Sumita Arora Solutions
Sumita Arora Book Solutions
Que 1 – An operating system manages
(a) Memory
(b) Processes
(c) Disks and I/O Devices
(d) All the above
Answer: (d) All the above
Que 2 – Which is not the function of an operating system?
(a) Memory management
(b) Disk management
(c) Application program management
(d) Virus protection
Answer: (d) Virus protection
Class 9 Computer Application 165 Chapter 4 Basic of Operating Systems Sumita Arora Solution
Que 3 – In which of the following OS types, the response type is very crucial?
(a) Unix operating system
(b) Real-Time OS
(c) Time-sharing OS
(d) Single-user OS
Answer: (b) Real-Time OS
Que 4 – The component program of an OS, which is responsible for interacting with the user is called ____.
(a) Interactive component
(b) User environment
(c) Operating environment
(d) User interface
Answer: (d) User interface
Que 5 -Explain what is meant by the term operating system.
Answer: An Operating System is a program, which acts as an interface between a user and the hardware (all computer resources). It controls all other components of the Computer system.
Que 6 – Give five functions of an operating system.
Answer: Five functions of an operating system are
- Program Execution
- Handling Input/Output Operations.
- Manipulation of file system
- Error detection and handling
- Resource allocation
- Memory Management
- Information and Resource Protection
Class 9 Computer Application 165 Chapter 4 Basic of Operating Systems
Que 7 – Explain the following terms :
(i) GUI (ii) WIMP
Answer: (i) GUI’s are visual (graphical) interfaces in which instead of typing in commands, the user can use a mouse to point and click objects on the screen
(ii) WIMP (Windows, lcons, Menu, Pointer) OSs are GUI operating systems that provide graphical interfaces to users and users can give commands by pointing at the screen.
Que 8 – Explain the difference between ‘multi-programming’ and ‘multi-tasking.
Answer: In multi-programming, multiple-user programs are loaded at the same time and each user can execute multiple applications, while in multi-tasking, the one-user program is loaded at the same time and allowed to execute multiple applications,
Que 9 – Explain briefly what a multi-user system is and how it works.
Answer: A Multi-user system is a computer system designed to be used simultaneously by more than one user.
Multiple users access the operating system with the help of many terminals connected to a network. The objective of a multi-user operating system is time-sharing and batch processing.
Que 10 – Explain briefly what a multi-tasking system is and how it works.
Answer: Multi-tasking allows processes to be done simultaneously, meaning the computer runs faster. This must be managed by the Operating System, as some commands may need information from other parts of the code. If this has not yet been done, then there will be a problem in the running of the program.
Class 9 Computer Application 165 – Sumita Arora Book Solution
Que 11 – How are Multiprogramming OSs different from Multiprocessing OSs?
Answer: Multiprocessing refers to the processing of multiple processes at the same time by multiple CPUs. Multiprogramming keeps several programs in the main memory at the same time and executes them concurrently utilizing a single CPU.
Que 12 – What is a Real-Time Operating System? How is it different from other OSs in terms of processing?
Answer: In real-time OS, the jobs have fixed deadlines and the jobs have to be completed within their deadlines. The system’s performance is measured by its ability to complete its jobs within the specified deadlines. Examples include LynxOS, OSE, RT Linux, etc.
Other Operating Systems do not have any time deadline to complete the processing, while Real Time OS has time constraints to finish the processing.
Que 13 – What does the term WIMP interface mean? What is a mobile application?
Answer: WIMP (Windows, lcons, Menu, Pointer) interface means graphical interfaces, in which users can give commands by pointing at the screen.
A mobile application or app is a computer program or software application designed to run on a mobile device such as a phone, tablet, or watch.
Class 9 Computer Application 165 Chapter 4 Basic of Operating Systems Sumita Arora Solution
Que 14 – What is a file system? How is it useful?
Answer: A file system defines or set up a structure to store files on disks along with rules that govern how a file would be read or written.
A file system is a part of the operating system that is responsible for organizing and retrieving files from a storage device.
Que 15 – Why do you need to install a device driver every time you attach a new hardware device with your computer?
Answer: A device driver is a group of files that enable one or more hardware devices to communicate with the computer’s operating system.
Without the device driver file, the computer will be unable to communicate with the device.