Recent questions and answers in Operating System
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Recent questions and answers in Operating System

Recent questions and answers in Operating System
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0 answers 21 views
Operating system
Some computer systems do not provide a privileged mode of operation in hardware. Is it possible to construct a secure operating system for these computer systems? Give arguments both that it is and that it is not possible.
Abubakar787 asked in Operating System Aug 24
by Abubakar787
5 points
21 views
0 votes
0 answers 33 views
ace workbook
which interrupt is needed to change the mode from non-privileged to privileged.? A hardware interrupt A software interrupt A privileged instruction (which doesn’t generate an interrupt) is needed A non-privileged instruction (which doesn’t generate an interrupt) is needed
Jeel Dasvani asked in Operating System Aug 24
by Jeel Dasvani
5 points
33 views
0 votes
0 answers 11 views
# self doubt
I think answer should be false, as Peterson solution and strict alteration solution are user-mode solutions to critical section problem. i read somewhere that strict alteration and peterson solution will only work on preemptive scheduling. is it true? and if it is true than does it affect answer to the asked question ?
i_ronak asked in Operating System Aug 23
by i_ronak
5 points
11 views
0 votes
0 answers 37 views
# self doubt
please explain what is the problem with hardware synchronization that software can cure. Is it locking the other cores on multicore processor.
i_ronak asked in Operating System Aug 21
by i_ronak
5 points
37 views
0 votes
0 answers 28 views
Operating system: partitioning topic, self made question
Autumn asked in Operating System Aug 19
by Autumn
71 points
28 views
0 votes
0 answers 69 views
Peterson algorithm process synchronisation
How Peterson algorithm satisfies the progress requirement. As we can see when process P1 execute first and initially turn = 1 and both flags are False. After P1 execute till instruction 2 (i.e. flag[1]=true and turn = 2) preemption ... As both the condition are true then process p1 will wait for p2. Iam not understanding how progress will work here.?
Sahiltam asked in Operating System Aug 18
by Sahiltam
5 points
69 views
0 votes
0 answers 33 views
OS homework
Hi, can someone draw me a proccesses tree by PID (PID of the first one is 2) to that program? and what are the possible outputs? Thank you, im a beginner. int i = 1; if (fork()) { ++i; fork(); } else if (fork()) { ++i; } printf("%d", i);
Benny430 asked in Operating System Aug 13
by Benny430
5 points
33 views
0 votes
0 answers 42 views
NPTEL OS Assignment Question Self Doubt
According to me the answer should be c , as the buffer is unbounded . There shoud be no need no use a full semaphore , if the buffer is unbounded . Am i right ?
hari0943 asked in Operating System Aug 7
by hari0943
9 points
42 views
0 votes
0 answers 27 views
Virtual Memory Management - Question from book Dietel
Ranjul Bandyopadhyay asked in Operating System Aug 3
by Ranjul Bandyopadhyay
7 points
27 views
0 votes
0 answers 31 views
ISI Entrance
Let s and t be two semaphores initialised to 1 and 0, respectively. Two threads T1 and T2 each execute the code shown below. 1: P(s) 2: V(s) 3: P(t) 4: V(t) (i) Does there exist an interleaving for which at least one of the ... justify your answer. (ii) What change(s) in the initial values assigned to the semaphores will guarantee that both threads will always progress to completion?
kauray asked in Operating System Aug 2
by kauray
5 points
31 views
0 votes
0 answers 44 views
Self doubt memory management
Logical add= segment no.+ Offset my question is offset calculation how does it
afroze asked in Operating System Jul 21
by afroze
7 points
44 views
0 votes
0 answers 56 views
Galvin 7th edition page 350
Using a page size of 4 bytes and a physical memory of 32 bytes (8 pages)! we show how the user's view of memory can be mapped into physical memory. Logical address 0 is page O! offset O. Indexing into the page table! we find that page 0 is in frame ... mapped to frame 6. Thus, logical address 4 maps to physical address 24 (= (6 x 4) + 0). This is from Galvin please xpln
afroze asked in Operating System Jul 19
by afroze
7 points
56 views
0 votes
0 answers 48 views
Virtual memory - Self doubt
I have been studying the virtual memory concept in Operating Systems. I understand that : Each process is given its own virtual address space - which might be very larger than the physical address space - to execute. If the processes cannot accommodate its pages in the ... process is $2^{64}$), but obviously my secondary memory is not $2^{64}$ bytes. What am I missing?
madhes23 asked in Operating System Jul 18
by madhes23
5 points
48 views
0 votes
0 answers 32 views
Scheduling algorithm in Operating System
How do we categorize a scheduling algorithm as CPU bound or I/O bound?
jayantmukundam asked in Operating System Jul 18
by jayantmukundam
5 points
32 views
0 votes
0 answers 29 views
OPERTING SYSTEM SELF RELOACTING
WHY SELF Relocating program LESS EFFICIENT THAN RELOCATABLE PROGRAM?
NITESH 766 asked in Operating System Jun 28
by NITESH 766
5 points
29 views
0 votes
0 answers 12 views
Galvin chapter -11 section 11.7 Recovery
hi this “recovery” topic in chapter 11 is necessary for os in gate or it is compulsory for doing for gate or can we skip this section. thank you
ykrishnay asked in Operating System Jun 24
by ykrishnay
103 points
12 views
0 votes
0 answers 14 views
I/O Scheduling in Operating system Gate 2021 Update #source #self-doubt
ykrishnay asked in Operating System Jun 24
by ykrishnay
103 points
14 views
0 votes
0 answers 20 views
self doubght
what is difference between preemption and inturrupts on process state diagram
Sachin85 asked in Operating System Jun 17
by Sachin85
5 points
20 views
0 votes
0 answers 43 views
Process management
In state transition diagram of scheduling if there is transition from running to ready then it will be preemptive scheduling otherwise not?? My doubt is if process request for io then it will move to blocked state and after completion then it will be pushed to ready state and again can go to running the. It also should be preemptive scheduling na !! Plz clear this doubt.
Vink7389 asked in Operating System Jun 12
by Vink7389
9 points
43 views
0 votes
0 answers 42 views
This question is related to Intrested Variable Mechnanism in Operating System.
anupam_12 asked in Operating System Jun 10
by anupam_12
5 points
42 views
0 votes
0 answers 27 views
System calls are onto or one to one?
afroze asked in Operating System May 27
by afroze
7 points
27 views
0 votes
0 answers 24 views
why cscan and scan is good for heavy load on disk ?Can anybody give proper explanation why this is so.
ignacio asked in Operating System May 27
by ignacio
5 points
24 views
0 votes
0 answers 38 views
Gate previous year question
User level threads are transparent to the kernel. This statement true or false ? Os don't know about the user leval threads because it is treated as process then why this is true ?
Enolx.21 asked in Operating System Apr 30
by Enolx.21
53 points
38 views
0 votes
0 answers 56 views
https://www.cs.utexas.edu/~lorenzo/corsi/cs372/06F/hw/3sol.html
Pranavapp asked in Operating System Apr 13
by Pranavapp
5 points
56 views
0 votes
0 answers 38 views
https://www.cs.utexas.edu/~lorenzo/corsi/cs372/06F/hw/3sol.html
Pranavapp asked in Operating System Apr 13
by Pranavapp
5 points
38 views
0 votes
0 answers 14 views
Gate 2019 Mining Question 19
If the time to failure of a machine component is exponentially distributed, the reliability of the same at Mean Time to Failure (MTTF) is ____
kartikb94 asked in Operating System Mar 22
by kartikb94
5 points
14 views
2 votes
0 answers 48 views
Paging. Self-Doubt
Here I solved this in this way .. Since the virtual address space is 32-bit long and the first 8 bit specifies the first-level index. Next is the Offset of the page which is 12 from the first line. Coincidently, 20 bit are still left here and it ... this might be the answer. For reference, the answer to the solution is given . Thanks in advance. Is my approach wrong or correct?
kirtipurohit asked in Operating System Mar 20
by kirtipurohit
15 points
48 views
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