CS604 Quiz 1 by VU Topper RM

Which of the following is not True for a time-sharing system?

1. Multi user
2. Interactive
3. Rigid time requirements
4. CPU sit idle when a process requires I/O operation

Correct answer: Rigid time requirements

The main characteristic of a Real time system is A. Efficiency

B. Usability

C. Large Virtual Memory D. Large secondary storage device

In indirect communication between processes P and Q __________ A. A link is associated with exactly two processes

B. There is a mailbox to help communication between P and Q Page 44 ok

C. There is another machine between the two processes to help communication D. There is another process R to handle and pass on the messages between P and Q

Which is not considered a role of an operating system?

1. Program execution
2. Protection of a user’s files and directories
3. Synchronization of cooperating processes
4. Memory allocation and de-allocation of a process

Correct answer: Synchronization of cooperating processes

Given below two statements can be categorized in some sort of message passing techniques. This type is named as ____________. Send (A, message) •Receive (B, message) A. Send by copy commuincation B. Explicit buffering C. Synchronization

D. Direct communication

__________view is that operating system is a resource manager. A. Down-up B. Single-up C. Top-down

D. bottom-up Page 3

The kernel is a computer program that manages _________requests from software A. Process B. Software C. Hardware

D. Input/output

If size of a process is 376052 bytes and its smallest physical memory address is 242785. Its address space cannot exceed beyond

A. 376053 B. 618836

C. 618837

D. 376051

__________ commands in Linux is used to copy file A. Is

B. Cp

C. Mv D. Mkdir

How many modes are supported in operating system?

1. 1
2. 2
3. 3
4. 4

Correct answer: 2

Q1. Vu-Topper RM (01 marks)

First _______ entries in Per Process File Descriptor Table are used as soon as the process is created. A. 1 B. 2

C. 3

Page 52 ok

D. 4

Q2. Vu-Topper RM (01 marks)

In Unix/Linux environment, Ayesha wants to know the complete picture of current processes in her session. Which of the following command will help her in this regard?

1. $ ps Page 63
2. $ gcc
3. $ top
4. $ fifo

Correct answer: $ ps Page 63

Q3. Vu-Topper RM (01 marks)

To display all processes ___________ option is used with ps command. A. -1

B. -e Page 53

C. -u D. -a

Q4. Vu-Topper RM (01 marks)

__________ commands in Linux helps to create a new directory. A. Is B. Cp C. Mv

D. Mkdr Page 26 ok

Q5. Vu-Topper RM (01 marks)

When processes are generated using fork () system call and then after that they are coordinated with each other using IPC channel. They are utilizing a separate address space for each of process (parent, child),, kernel resources and IPC channel. This makes it a more heavy. Which strategy can be used to make it light?

A. Use of thread Page 67

B. Use of batch systems C. Scheduling of each process D. Termination of child process when these become more