► Firmware based solution

► Operating system based solution

► Hardware based solution

 

 

Question No: 20 ( Marks: 1 ) – Please choose one

                  _ is also called Swapper.

► Swap space

► Medium term scheduler

► Short term scheduler

► Long term scheduler

 

MIDTERM   EXAMINATION

Spring 2009

CS604- Operating Systems (Session – 1)

Question No: 1           ( Marks: 1 ) – Please choose one
I MB or 1 megabyte is equivalent to—-

 

1024 bytes

1024² bytes (may be this)

1024³ bytes

1000000 bytes

 

 

Question No: 2           ( Marks: 1 ) – Please choose one

 

The bottom layer in the layered approach of Operating System is———–
Hardware

 

User interface

Hardware

Kernel

None of the given options

 

Question No: 3           ( Marks: 1 ) – Please choose one

 

————has a hierarchical file system structure.

 

DOS

Windows

UNIX

None of the given options

 

Question No: 4           ( Marks: 1 ) – Please choose one

 

You can use the ———command in UNIX to create a directory.

rmdir

mkdir

cp

gcc

 

Question No: 5           ( Marks: 1 ) – Please choose one

 

Files that start with a ——– in UNIX/Linux directory structure are known as hidden files .

 

. (dot)

# ( hash )

/ (slash)

~ (tilt)

 

Question No: 6           ( Marks: 1 ) – Please choose one

 

The creating process is called a————— process while the new processes are called the ————– of that process

 

None of the given options

Children, parent

Parent, children

Zombie, single

 

Question No: 7           ( Marks: 1 ) – Please choose one

 

————buffer places no practical limit on the size of the buffer

 

Bounded

Unbounded

Both Unbounded & bounded

Bounded

Unbounded

None of the given options

 

Question No: 8           ( Marks: 1 ) – Please choose one

The ———— are used for communication between related or unrelated

processes on the same system or unrelated processes on different systems.

 

Pipes

BSD Sockets

Named pipe (FIFO)

None of the given options

 

 

 

Question No: 9           ( Marks: 1 ) – Please choose one

 

A —————is an abstract key for accessing a file.

 

File descriptor

Input Redirection

Output Redirection

FIFO

 

Question No: 10         ( Marks: 1 ) – Please choose one

 

——– command gives a snapshot of the current processes.

 

ps

top

who

ls

 

Question No: 11         ( Marks: 1 ) – Please choose one

You can display all of the signals supported by your system, along with their numbers, by using the ———–command

 

<Ctrl-A>

fg

jobs
kill -l

 

Question No: 12         ( Marks: 1 ) – Please choose one

 

The time it takes for the dispatcher to stop one process and start another running is known as the———–.

 

Dispatch latency

Scheduling

Context switching

None of the given options

 

Question No: 13         ( Marks: 1 ) – Please choose one

First-Come, First-Served (FCFS) is a ————–scheduling algorithm.

 

preemptive

non-preemptive

both preemptive and non- preemptive none of the given options

 

 

 

Question No: 14         ( Marks: 1 ) – Please choose one

 

The Shortest-Job-First Scheduling algorithm can be

 

Preemptive only

non-preemptive only

preemptive or non-preemptive.
None of the given options

 

Question No: 15         ( Marks: 1 ) – Please choose one

 

Preemptive —————-scheduling is sometimes called shortestremaining-time-first scheduling.

 

First-Come-First-Served (FCFS)

Round-Robin

Sorted Job First (SJF)
Priority

 

Question No: 16         ( Marks: 1 ) – Please choose one

The basic purpose of ________________is to help the users to utilize the hardware

resources for completing different tasks in a simplified manner

 

Operating system

Application software

All Software

All of the given

 

 

Question No: 17         ( Marks: 1 ) – Please choose one

OS helps manages the following except

 

Application software

Bus speed of the system

Memory

Virtual memory

 

Question No: 18         ( Marks: 1 ) – Please choose one

__________ scheduler selects the process from the job pool and put them in main

memory.

 

Long term

Short term

Medium term

Swapper

 

 

Question No: 19         ( Marks: 1 ) – Please choose one

 

A parent   process calling __________ system call will be suspended until children process erminates.

 

wait

fork

exit

exec

Question No: 20         ( Marks: 1 ) – Please choose one

 

n-process critical section problem can be solved by using

 

The bakery algorithm

Deterministing modeling

Analytic evaluation

None of above

1. Linux OS can support multiple users at a time
a) True
b) False
2. The Operating system is a layer of software between _________ and ___________.
a) hardware, software application
b) Kernel, hardware
c) Dos, Windows
d) Windows, Kernel

3. The major advantage of multi-programming system is
a) More than one jobs can be processed at a given time
b) CPU utilization can be increased
c) Jobs can be completed quickly
d) All of the options are correct

4. The main characteristic of a Real time system is
a) Efficiency
b) Large Virtual Memory
c) Large secondary storage device
d) Usability

5. Command-line interpreter is also called __________ in some operating systems.
a) Kernel
b) Shell
c) Signal
d) API

6. I/O instructions are Privileged Instructions.
a) True
b) False

7. In Linux directory structure, there is ___________ root directory.
a) 1
b) 2
c) 3
d) 4

8. Utilities used for system administration (halt, ifconfig, fdisk, etc.) are stored in _____________ directory.
a) /dev
b) /boot
c) /lib
d) /sbin

9. rm and rmkdir commands are used to _____________ directory.
a) Create
b) Move
c) Remove
d) Modify

10. You can use the mv file1 file2 command to move ______________
a) file1 to file2.
b) file 2 to file 1
c) this command will not work for moving files
d) None of the option is correct.
e) Both option a and b are correct

11. Taking the CPU from one process and giving the CPU to another process is termed as
a) Context Switching
b) Dispatching
c) Swapping
d) Tracking

12. ___________ scheduler is also called Swapper.
a) Long term
b) Short term
c) Medium term
d) Swap space

13. A Process A that has finished working, as well as its parent process has also finished its execution. In this state the process A will be called as _________ process.
a) Child
b) Thread
c) Zombie
d) Fork

14. Bounded Buffer is a buffer of ____________ size
a) variable
b) fixed

15. In ________ communication the process which wants to communicate with the other process must explicitly name the recipient and the sender.
a) Direct
b) Indirect
c) Automatic
d) Self

16. In indirect inter process communication, a sender ________ mention the name of the recipient.
a) does
b) does not

 MIDTERM EXAMINATION

Spring 2009 CS604-Operating Systems (Session -1)

CS604: QUIZES

Question # 1 of 10 ( Start time: 06:17:33 PM )  Total Marks: 1
Linux uses ___________ directory to store system configuration files.
Select correct option:
/bin
/dev
/boot
 /etc

Question # 2 of 10 ( Start time: 06:18:01 PM )  Total Marks: 1
OS helps manages the following except
Select correct option:
Application software
Memory
Virtual memory
 Bus speed of the system

Question # 3 of 10 ( Start time: 06:18:09 PM )  Total Marks: 1
Linux OS can support multiple users at a time
Select correct option:
True
False
Question # 4 of 10 ( Start time: 06:18:17 PM )  Total Marks: 1
__________ directory includes essential system boot files including the kernel image.
Select correct option:
/bin
 /boot
/dev
/etc
Question # 5 of 10 ( Start time: 06:19:17 PM )  Total Marks: 1
_______ command displays the contents of current working directory.
Select correct option:
ls
cs
mv
cp
Question # 6 of 10 ( Start time: 06:20:29 PM )  Total Marks: 1
In Linux directory structure, there is ___________ root directory.
Select correct option:
1
2
3
4
Question # 7 of 10 ( Start time: 06:20:37 PM )  Total Marks: 1
You can use the rm file1 command to __________ file1.
Select correct option:
retrieve
remove
make
modify

Question # 8 of 10 ( Start time: 06:20:54 PM )  Total Marks: 1
Shared libraries and kernel modules are stored in _____________ directory.
Select correct option:
/bin
/dev
/boot
 /lib
Question # 9 of 10 ( Start time: 06:21:25 PM )  Total Marks: 1
Linux is only single user operating system
Select correct option:
True
False

Question # 10 of 10 ( Start time: 06:21:35 PM )  Total Marks: 1
____________ command is used to change the directory.
Select correct option:
ls
cp
cd
mv

 

Question # 1 of 10 ( Start time: 05:04:51 PM ) Total Marks: 1
The major advantage of multi-programming system is
Select correct option:

More than one jobs can be processed at a given time
CPU utilization can be increases
Jobs can be completed quickly
All of the options are correct

Question # 2 of 10 ( Start time: 05:06:16 PM ) Total Marks: 1
The basic purpose of ________________is to help the users to utilize the hardware resources for completing different tasks in a simplified manner.
Select correct option:

Operating system
Application software
All Software
All of the given

Question # 4 of 10 ( Start time: 05:08:22 PM ) Total Marks: 1
Linux uses ___________ directory to store system configuration files.
Select correct option:

/bin
/dev
/boot
/etc

Question # 5 of 10 ( Start time: 05:09:05 PM ) Total Marks: 1
You can use the rm file1 command to __________ file1.
Select correct option:
retrieve
remove
make

Question # 6 of 10 ( Start time: 05:09:41 PM ) Total Marks: 1
DOS is a single user operating system.
Select correct option:

True
False

Question # 7 of 10 ( Start time: 05:10:58 PM ) Total Marks: 1
A time sharing system is
Select correct option:

Multi user
Multi tasking
Interactive
All of these

Question # 9 of 10 ( Start time: 05:13:20 PM ) Total Marks: 1
A program in execution is called a _______________.
Select correct option:

Command
Process
Software
Compiler

Question # 10 of 10 ( Start time: 05:14:24 PM ) Total Marks: 1
____________ command is used to change the directory.
Select correct option:

ls
cp
cd
mv

 

 

Question # 1 of 10 ( Start time: 06:17:33 PM ) Total Marks: 1
Linux uses ___________ directory to store system configuration files.
Select correct option:
/bin
/dev
/boot
/etc

Question # 2 of 10 ( Start time: 06:18:01 PM ) Total Marks: 1
OS helps manages the following except
Select correct option:
Application software
Memory
Virtual memory
Bus speed of the system

Bottom of Form

 

CS604 MIDTERM ALL LATEST PAPERS IN ONE THREAD FALL 2011 MONTH OF MAY

 

PAPER#1

Total 23 Questions
MCQs 16
1. List and define the different metrics by which might evaluate a scheduler (List at least 4). 5 marks
2. Write brief the multilevel feedback queue scheduling. 5 marks
3. Assumption made while formulating a solution to the critical section problem. 2 marks
4. There are many commands. Write the method through which these commands can communicate with each other. 3 marks
5. Write Difference between SJF and Shortest Remaining Time First Scheduling algorithm. 3 marks
6. Write formula for calculating waiting time in preemptive Shortest Job First Algorithm. 2 marks
7. Define race condition and how prevent this condition. 2 marks

 

PAPER#2

Question No: 17 ( Marks: 2 )
What is Convoy Effect?

Question No: 18 ( Marks: 2 )
What are the common data structures in Bakery Algorithm?

Question No: 19 ( Marks: 2 )
How a pipe can be created?

Question No: 20 ( Marks: 3 )
Define Progress and Bounded Waiting.

Question No: 21 ( Marks: 3 )
What is Starvation and how it occures

Question No: 22 ( Marks: 5 )
What are the advantages of Round Robin Scheduling Algorithm?

Question No: 23 ( Marks: 5 )
Analyze the following algorithm to solve the critical section problem and explain whether it satisfies the Mutual Exclusion Characteristic

Flag[i] = True;
Turn = j;
do{
while(Flag[j] = True && turn==j);
critical section
Flag[i] = False;
remainder section
} While(1)