Short Answer Type Questions: Operating System | Computer Science for Grade 9 PDF Download

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Q.1. What are system calls?

In computing, a system call is the programmatic way in which a computer program requests a service from the kernel of the operating system it is executed on.

Q.2. State any one function of the memory management of the operating system.

The memory management function of an operating system keeps track of the main memory and checks which part is in use and by which process. It also keeps track of the part that is not in use.

Q.3. What is a interactive operating system?

Interactive (GUI based) Operating System: GUI or Graphical User Interface based Operating System allows the use of icons, windows and menus as tools to interact with the computer.

Q.4. What do you understand by the term “Device Management”?

It is used to keep track of all I/O (Input/Output) devices like monitor, keyboard, mouse, scanner, etc., and the program responsible for this task is known as the I/O controller.

Q.5. Name the different type of services provided by system calls.

The following are some of the services provided by the system calls:

• Process creation and management
• Main memory management
• File Access, Directory and File system management
• Device handling(I/O)
• Protection
• Networking

Q.6. What is an operating system?

An operating system (OS) is software that manages computer hardware and software resources and provides common services for computer programs.

Q.7. What is a real time operating system?

A real-time operating system (RTOS) is an operating system (OS) intended to serve real-time applications that process data as it comes in, typically without buffer delays.

Q.8. What is an user interface?

User Interface refers to the visual part of an operating system through which a user interacts with a computer or a software.

Q.9. Why is an operating system needed for a computer system?

In earlier day’s user had to design the application according to the internal structure of the hardware. Operating System was needed to enable the user to design the application without concerning the details of the computer’s internal structure. In general the boundary between the hardware & software is transparent to the user.

Q.10. How is a real time operating system different from distributed operating system?

A distributed OS provides the essential services and functionality required of an OS, adding  attributes and particular configurations to allow it to support additional requirements such as increased scale and availability. To a user, a distributed OS works in a manner similar to a single- node, monolithic operating system. That is, although it consists of multiple nodes, it appears to users and applications as a single-node.

A real time operating system is intended to serve real-time application process data as it comes in, typically without buffering delays. Processing time requirements (including any OS delay) are measured in tenths of seconds or shorter.

Q.11. State any two functions of memory management by the operating system.

The following are the functions associated with the memory management:

• The kernel keeps track of the main memory and checks which part is in use and by which process. It also keeps track of the part that is not in use.
• The kernel makes a decision on which process will get memory when and by how much? Thus each process must have enough memory in which to execute, and should not overlap the memory space of another process nor be run into by another process.