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We Discuss About That NPTEL Introduction to Operating Systems Assignment 4 Answer
NPTEL Introduction to Operating Systems Assignment 4 Answer – Here All The Questions and Answers Provided to Help All The Students and NPTEL Candidate as a Reference Purpose, It is Mandetory to Submit Your Weekly Assignment By Your Own Understand Level.
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NPTEL Introduction to Operating Systems Assignment
ABOUT THE COURSE :
Operating systems (OS) provide the crucial interface between a computer’s hardware and the applications that run on it. It allows us to write programs without bothering much about the hardware. It also ensures that the computer’s resources such as its CPU, hard disk, and memory, are appropriately utilized. In this course, we dwell into how the OS manages to do all this in an efficient manner. This is an introductory course, for students with prior knowledge of computer organization. The course is based on an OS called xv6, which in many ways is similar to the Linux operating systems.
INTENDED AUDIENCE B.E./Msc (Computer Science)
PRE-REQUISITES Good knowledge of C, Computer Organization and Architecture, x86 Assembly level programming.
Next Week Assignment Answers
This course can have Associate in Nursing unproctored programming communication conjointly excluding the Proctored communication, please check announcement section for date and time. The programming communication can have a weightage of twenty fifth towards the ultimate score.
Assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
( All assignments in a particular week will be counted towards final scoring – quizzes and programming assignments).
Unproctored programming exam score = 25% of the average scores obtained as part of Unproctored programming exam – out of 100
Proctored Exam score =50% of the proctored certification exam score out of 100
YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF ASSIGNMENT SCORE >=10/25 AND UNPROCTORED PROGRAMMING EXAM SCORE >=10/25 AND PROCTORED EXAM SCORE >= 20/50.
If any one of the 3 criteria is not met, you will not be eligible for the certificate even if the Final score >= 40/100.
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1 point
A double fault is a fault that occurs when a CPU is trying to call an exception handler.
Ans – C
1 point
Arrange in order of occurance
a) Obtain the IRQ number from the interrupt controller
b) I/O APIC transfer interrupt to Local APIC.
c) Save the program states
d)Local APIC assert the CPU interrupt
Ans – D
1 point
A system n processes, and with a non preemptive scheduler. What is the total number of scheduling possible?
Ans – C
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1 point
When a CPU is interrupted, it
Stops executing instructions
Acknowledge interrupt and continues
Acknowledge interrupt and branches to a subroutine
Acknowledge interrupt and waits for the next instruction from the interrupted device
Consider a system having n CPUs, k processes, and k > n. Calculate the upper bound and lower bound for the number of processes in the RUNNING, READY and BLOCKED states.
1 point
The upper bound is :
k, k, k
n, k, k
k, k , n
k, n, k
Ans – B
1 point
The lower bound is :
1, 1, 1
0, 0, 0
0, 1 , 1
1, 1, 0
Ans – D
1 point
Six bytes are required to store the Interrupt gate descriptor in Intel’s 80386 processor. Each descriptor comprises of 32 bits for the segment
selector and 16 bits for the offset(segment selector:offset). What is the total size in bytes of the interrupt descriptor table (IDT)?
1256
1024
1536
1280
Ans – C
1 point
Which one of the following is FALSE?
Kernel level threads cannot share the code segment
User level threads are not scheduled by the kernel
Context switching between user level threads is faster than context switching between kernel level threads
When a user level thread is blocked, all other threads of its process are blocked
Ans – A
1 point
Context switching is not required for a system without multiprogrammed OS
True
False
Ans – A
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1 point
Which of the below statement is False?
Kernel stack can be used to store the context of a process
User stack is used to store the function details during function calls
Kernel stack is used to store the function arguments during systems calls
Context of the process is useful to restart the process after some time
Ans – B
1 point
a-3, b-1 c-4, d-2
a-3, b-4,c-1, d-3
a-4, b-1, c-4, d-2
a-4, b-3, c-2, d -1
Ans – B
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