2 MARKS-OPERATING SYSTEM SAE5A/SAZ4A

 

1. What is an operating System?

An operating system is a program that manages the computer hardware.

2.Four Components of Computer System?

Hardware, Operating System, Application Programs& Users

3. User view of Operating System?

    1.Ease of Use

    2. Resource Utilization

4.System View of Operating System?

    1.Resource allocator

    2.need to control various I/O devices and user programs.

5.What are the goals of Operating system ?

    1. Convenience for the user

    2. Efficient operation of the system

6. What do you mean by Time sharing Systems? or What do you mean by multiprogramming?

•     Time sharing or Multi tasking is a logical extension of multiprogramming.
•     The CPU executes multiple jobs by switching among them, the switches occur frequently that the users can interact with each program while its running.

7.What are the main advantages of multiprocessor system

1. Increased throughput
2. Economy of scale
3. Increased reliability

8. Define multiprocessor systems?

• also known as parallel systems or tightly coupled systems
• Systems have more than one processor in close communication ,sharing the computer bus, the clock, memory &peripheral devices.

9. What are symmetric multiprogramming (SMP)?

• in which processor runs an identical copy of the operating system, and these copies communicate with one another as needed.

10.What are Asymmetric multiprogramming(ASMP)?

• in which each  processor is assigned a specific task.
• A master processor controls the system ;other processors either look to the master for instruction or have predefined tasks.
• The master processor schedules and allocates work to the slave processors.