Recent questions tagged system-call / GATE Overflow for GATE CSE

0 votes

0 answers

1

Best Open Video Playlist for System Calls Topic | Operating Systems
Please list out the best free available video playlist for System Calls from Operating systems as an answer here (only one playlist per answer). We'll then select the best playlist and add to GO classroom video lists. ... standard ones are more likely to be selected as best. For the full list of selected videos please see here

Please list out the best free available video playlist for System Calls from Operating systems as an answer here (only one playlist per answer). We'll then select the bes...

makhdoom ghaya

181 views

makhdoom ghaya asked Aug 20, 2022

1 votes

1 answer

2

Made easy || Operating system
Consider a process P running on a system with non-preemptive Kernel design. Consider following actions by P : (i) A blocking system call. (ii) Servicing a timer interrupt. (iii) Exit system call. (iv) Servicing a disk interrupt, that results in another blocked process being marked as ready. Which of the above actions always result in context-switch of P?

Consider a process P running on a system with non-preemptive Kernel design. Consider following actions by P :(i) A blocking system call.(ii) Servicing a timer interrupt.(...

Shreya2002

1.6k views

Shreya2002 asked Aug 5, 2022

0 votes

1 answer

3

operating system
what is seek system call? can anyone explain?

what is seek system call? can anyone explain?

jugnu1337

521 views

jugnu1337 asked Dec 18, 2021

18 votes

4 answers

4

GATE CSE 2021 Set 1 | Question: 14
Which of the following standard $C$ library functions will always invoke a system call when executed from a single-threaded process in a $\text{UNIX/Linux}$ operating system? $\textsf{exit}$ $\textsf{malloc}$ $\textsf{sleep}$ $\textsf{strlen}$

Which of the following standard $C$ library functions will always invoke a system call when executed from a single-threaded process in a $\text{UNIX/Linux}$ operating sys...

Arjun

10.8k views

Arjun asked Feb 18, 2021

3 votes

2 answers

5

UGC NET CSE | October 2020 | Part 2 | Question: 84
Assuming that the system call $\text{fork}()$ never fails, consider the following C program $P1$ and $P2$ ... $II$ are false Statement $I$ is correct but Statement $II$ is false Statement $I$ is incorrect but Statement $II$ is true

Assuming that the system call $\text{fork}()$ never fails, consider the following C program $P1$ and $P2$ executed on a UNIX/Linux system:$\begin{array}{|ll|ll|} \hline &...

go_editor

2.6k views

go_editor asked Nov 20, 2020

0 votes

2 answers

6

NIELIT 2017 DEC Scientific Assistant A - Section B: 37
How many times the word "PROCESS" will be printed when executing the following program ? main(){ printf("PROCESS"); fflush(); fork(); fork(); } $8$ $4$ $6$ $7$

How many times the word "PROCESS" will be printed when executing the following program ?main(){ printf("PROCESS"); fflush(); fork(); fork(); }$8$$4$$6$$7$

admin

1.5k views

admin asked Mar 31, 2020

0 votes

0 answers

7

Andrew S. Tanenbaum (OS) Edition 4 Exercise 4 Question 9 (Page No. 333)
In UNIX and Windows, random access is done by having a special system call that moves the ‘‘current position’’ pointer associated with a file to a given byte in the file. Propose an alternative way to do random access without having this system call.

In UNIX and Windows, random access is done by having a special system call that moves the ‘‘current position’’ pointer associated with a file to a given byte in t...

admin

246 views

admin asked Oct 26, 2019

2 votes

1 answer

8

Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 4 (Page No. 174)
When an interrupt or a system call transfers control to the operating system, a kernel stack area separate from the stack of the interrupted process is generally used. Why?

When an interrupt or a system call transfers control to the operating system, a kernel stack area separate from the stack of the interrupted process is generally used. Wh...

admin

2.0k views

admin asked Oct 24, 2019

0 votes

0 answers

9

Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 29 (Page No. 83)
Figure $1-23$ shows that a number of UNIX system calls have no Win32 API equivalents. For each of the calls listed as having no Win32 equivalent, what are the consequences for a programmer of converting a UNIX program to run under Windows?

Figure $1-23$ shows that a number of UNIX system calls have no Win32 API equivalents. For each of the calls listed as having no Win32 equivalent, what are the consequence...

admin

648 views

admin asked Oct 23, 2019

0 votes

0 answers

10

Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 28 (Page No. 83)
To a programmer, a system call looks like any other call to a library procedure. Is it important that a programmer know which library procedures result in system calls? Under what circumstances and why?

To a programmer, a system call looks like any other call to a library procedure. Is it important that a programmer know which library procedures result in system calls? U...

admin

229 views

admin asked Oct 23, 2019

1 votes

0 answers

11

Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 23 (Page No. 82 - 83)
A file whose file descriptor is fd contains the following sequence of bytes$: 3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5.$ The following system calls are made: lseek(fd, $3$, SEEK SET); read(fd, &buffer, $4$); where the lseek call makes a seek to byte $3$ of the file. What does buffer contain after the read has completed?

A file whose file descriptor is fd contains the following sequence of bytes$: 3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5.$ The following system calls are made:lseek(fd, $3$, SEEK SE...

admin

677 views

admin asked Oct 23, 2019

0 votes

0 answers

12

Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 20 (Page No. 82)
For each of the following system calls, give a condition that causes it to fail: fork, exec, and unlink.

For each of the following system calls, give a condition that causes it to fail: fork, exec, and unlink.

admin

251 views

admin asked Oct 23, 2019

0 votes

0 answers

13

Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 16 (Page No. 82)
When a user program makes a system call to read or write a disk file, it provides an indication of which file it wants, a pointer to the data buffer, and the count. Control is then transferred to the operating ... What about the case of writing to the disk? Need the caller be blocked awaiting completion of the disk transfer?

When a user program makes a system call to read or write a disk file, it provides an indication of which file it wants, a pointer to the data buffer, and the count. Contr...

admin

308 views

admin asked Oct 23, 2019

0 votes

0 answers

14

UPPCL AE 2018:54
Assume that a file is written using write $\text{(fd, buf, K)}$ system call, where $\text{fd}$ is the file descriptor and $\text{K}$ is the number of bytes to be written to the current file offset which is a multiple of the disk block size $\text{D}$. The total number ... system call returns None of the above is at least $\text{K/D}$ is equal to $\text{K/D}$ is at most $\text{K/D}$

Assume that a file is written using write $\text{(fd, buf, K)}$ system call, where $\text{fd}$ is the file descriptor and $\text{K}$ is the number of bytes to be written ...

admin

227 views

admin asked Jan 5, 2019

0 votes

1 answer

15

UPPCL AE 2018:36
Consider the following program. #include<stdio.h> #include<stdlib.h> #include<unistd.h> int main(void) { pid_t pid; int varl = 100; pid = fork(); if(pid == 0) /* Child process */ varl = 200; fork(); printf( %d , varl); return 0; } Assuming all invocations of fork are ... $200 \; 200 \; 200 \; 200$ $100 \; 100 \; 100 \; 100$ $100 \; 200 \; 200 \; 200$

Consider the following program.#include<stdio.h #include<stdlib.h #include<unistd.h int main(void) { pid_t pid; int varl = 100; pid = fork(); if(pid == 0) /* Ch...

admin

403 views

admin asked Jan 5, 2019

0 votes

0 answers

16

UPPCL AE 2018:19
Consider the following statements regarding interrupts. If a process is interrupted during system call handling then the $\text{OS}$ will crash. If a process is interrupted during system call handling then the process is moved to the $\text{READY}$ queue. If an interrupt handler is ... of the above $\text{III}$ only $\text{II}$ and $\text{III}$ $\text{I}$ and $\text{III}$

Consider the following statements regarding interrupts.If a process is interrupted during system call handling then the $\text{OS}$ will crash.If a process is interrupted...

admin

265 views

admin asked Jan 5, 2019

1 votes

2 answers

17

UGC NET CSE | November 2017 | Part 3 | Question: 75
Match the following WINDOWS system calls and UNIX system calls with reference to process control and File manipulation. ... $(a)-(iii) \: (b)-(iv) \: (c)-(ii) \: d-(i)$

Match the following WINDOWS system calls and UNIX system calls with reference to process control and File manipulation. $$\begin{array}{llll} & \textbf{Windows} & & \text...

Arjun

1.1k views

Arjun asked Nov 5, 2017

2 votes

3 answers

18

General Topic Doubt Operating System: Fork
How is the answer coming out to be 32?

How is the answer coming out to be 32?

Ishita Gupta

993 views

Ishita Gupta asked Sep 10, 2016

tags	tag:apple
author	user:martin
title	title:apple
content	content:apple
exclude	-tag:apple
force match	+apple
views	views:100
score	score:10
answers	answers:2
is accepted	isaccepted:true
is closed	isclosed:true