BIT301 – Operating System

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PROGRAM

Bachelor of Science in Information Technology - B.SC(IT)

SEMESTER

III

SUBJECT CODE & NAME

BIT301 – Operating System

Qus:1 What are the different operation performed by operating system?

Answer: Operating System is a System Software (Set of system programs) which provides an environment to the user so that they can execute the programs or instruct the computer to do certain work i.e. provide interface for user to communicate with the computer system. The Operating System acts as a resource manager which allocates and manages various resources like processor(s), main

Qus:2 Mention different states of a process.

Answer: A program in execution is called a process. A process is executed sequentially, one instruction at a time. A program is a passive entity. For example, a file on the disk. A process on the other hand is an

Qus:3 What are the necessary conditions for a deadlock?

Answer: Deadlock prevention algorithms ensure that at least one of the four necessary conditions for deadlocks namely mutual exclusion, hold and wait, no preemption and circular wait do

Qus:4 Write a short note on Multi-programmed Batched Operating Systems.

Answer: The concept of spooling introduced an important data structure called the job pool. Spooling creates several jobs on the disk ready for execution or processing. The operating system now has to choose from the job pool, a job that is to be executed next. This increases CPU utilization as CPU is

Qus:5 What are the different information stored in a process control block (PCB)?

Answer: In order to manage and coordinate the various processes, the operating system identify these processes in terms of numbers and Process Control Block (PCB). A Process Control Block is a data structure maintained by the Operating System for every process. A PCB keeps all the information needed to keep track of a process. The PCB serves as a repository of

Qus:6 Discuss in details about deadlock prevention.

Answer: The four necessary conditions for deadlocks to occur are mutual exclusion, hold and wait, no preemption and circular wait. If any one of the above four conditions does not hold, then deadlocks will not occur. Thus prevention of deadlock is possible by ensuring that at least one of the

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