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Recent questions tagged operating-system

2 votes
1 answer
2581
Os+file system
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1 votes
1 answer
2583
Os+ disk+ntpel question
Disk cache have cache access not in heiracrchially manner by default?? I am getting 76 as answer
Disk cache have cache access not in heiracrchially manner by default?? I am getting 76 as answer
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0 votes
1 answer
2584
Self Doubt
Can someone make me clear whether segmentation method of memory allocation is free from internal and external fragmentation.? Also plz give valid explanation in support of your answer.
Can someone make me clear whether segmentation method of memory allocation is free from internal and external fragmentation.? Also plz give valid explanation in support o...
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2 votes
0 answers
2586
fork() system call
int main(void) { if(fork() && fork()) { fork(); } if(fork() || fork()) { fork(); fork(); } printf("\nGate 2017\n"); } How many times "Gate 2017" will be printed?
int main(void) { if(fork() && fork()) { fork(); } if(fork() || fork()) { fork(); fork(); } printf("\nGate 2017\n"); }How many times "Gate 2017" will be printed?
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2 votes
0 answers
2587
fork() system call
for(i=1;i<=3;i++) { fork(); printf("x"); } How many times 'x' is printed ?
for(i=1;i<=3;i++) { fork(); printf("x"); }How many times 'x' is printed ?
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0 votes
1 answer
2589
Doubt
which of the following are private specific to thread? a) pc b) stac pointer c) execution stack d) memory
which of the following are private specific to thread?a) pcb) stac pointerc) execution stackd) memory
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1 votes
0 answers
2591
does operating system always runs in privileged mode
does operating system always runs in privileged mode or is there any other way also?
does operating system always runs in privileged mode or is there any other way also?
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1 votes
1 answer
2593
Ace Test Series: Operating System - Process
Which of the following information is not a part of process control block? a) CPU scheduling information b) CPU-stack pointer values c) CPU-timer information d) CPU- accumulator interrupt
Which of the following information is not a part of process control block?a) CPU scheduling informationb) CPU-stack pointer valuesc) CPU-timer informationd) CPU- accumula...
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0 votes
0 answers
2594
madeeasy testseries
consider the following pseudo code main() { int t1=0,t2=0,t3=0; t1=fork(); t2=fork(); if(t1!=0) { t3=fork(); printf("0"); } } The total number of processes that will be created by the above program execution are__
consider the following pseudo codemain(){int t1=0,t2=0,t3=0;t1=fork();t2=fork();if(t1!=0){ t3=fork();printf("0");}}The total number of processes that will be created by t...
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1 votes
2 answers
2596
Operating System
Which of the scheduling alogorithm gives the best throughput for n tasks having r1,r2,...,rn as running time? a) RR b) ShortestJob First c) FCFS d) Hiighest-Response Ration Next
Which of the scheduling alogorithm gives the best throughput for n tasks having r1,r2,...,rn as running time?a) RRb) ShortestJob Firstc) FCFSd) Hiighest-Response Ration N...
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0 votes
1 answer
2598
System Call
What is system call? Why is it not done in previledge mode?
What is system call? Why is it not done in previledge mode?
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1 votes
3 answers
2603
CPU Scheduling
Which are invalid process state transition? a. Timer Start: ready->running b. Timer Out: running->blocked c. I/O: running->ready d. Resume : suspend->running
Which are invalid process state transition?a. Timer Start: ready->runningb. Timer Out: running->blockedc. I/O: running->readyd. Resume : suspend->running
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3 votes
2 answers
2605
Doubt
Where Does PCB get stored? a) main memory b) Kernel c) both a & b d) secondary memory
Where Does PCB get stored?a) main memoryb) Kernelc) both a & bd) secondary memory
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1 votes
2 answers
2607
cpu scheduler
Q1) _________________ scheduler hold the degree of multi programming Q2) _________________ scheduler reduces the degree of multi-programming.
Q1) _________________ scheduler hold the degree of multi programmingQ2) _________________ scheduler reduces the degree of multi-programming.
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2 votes
1 answer
2609
Semaphores:
Assume that you have a semaphore associated with each item on a doubly linked list. Using No other synchronization primitive, What is the fewest number of semaphore that you must acquire for any operation (lookup, insert, delete) ?
Assume that you have a semaphore associated with each item on a doubly linked list. Using No other synchronization primitive, What is the fewest number of semaphore that ...
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