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53 votes

4 answers

1

GATE CSE 2004 | Question: 11
Consider the following statements with respect to user-level threads and kernel-supported threads context switch is faster with kernel-supported threads for user-level threads, a system call can block the entire process Kernel supported threads can be scheduled independently User level threads ... ) and (IV) only (II) and (III) only (I) and (III) only (I) and (II) only

Consider the following statements with respect to user-level threads and kernel-supported threadscontext switch is faster with kernel-supported threadsfor user-level thre...

Kathleen

27.8k views

Kathleen asked Sep 18, 2014

54 votes

3 answers

2

GATE CSE 2014 Set 1 | Question: 20
Which one of the following is FALSE? User level threads are not scheduled by the kernel. When a user level thread is blocked, all other threads of its process are blocked. Context switching between user level threads is faster than context switching between kernel level threads. Kernel level threads cannot share the code segment.

Which one of the following is FALSE?User level threads are not scheduled by the kernel.When a user level thread is blocked, all other threads of its process are blocked.C...

go_editor

24.9k views

go_editor asked Sep 26, 2014

8 votes

1 answer

3

GATE CSE 2023 | Question: 12
Which one or more of the following need to be saved on a context switch from one thread $\text{(T1)}$ of a process to another thread $\text{(T2)}$ of the same process? Page table base register Stack pointer Program counter General purpose registers

Which one or more of the following need to be saved on a context switch from one thread $\text{(T1)}$ of a process to another thread $\text{(T2)}$ of the same process?Pag...

admin

10.0k views

admin asked Feb 15, 2023

25 votes

4 answers

4

GATE CSE 2021 Set 2 | Question: 42
Consider the following multi-threaded code segment (in a mix of C and pseudo-code), invoked by two processes $P_1$ and $P_2$, and each of the processes spawns two threads $T_1$ and $T_2$: int x = 0; // global Lock L1; // global main () { create a ... the value of $y$ as $2.$ Both $T_1$ and $T_2$, in both the processes, will print the value of $y$ as $1.$

Consider the following multi-threaded code segment (in a mix of C and pseudo-code), invoked by two processes $P_1$ and $P_2$, and each of the processes ...

Arjun

10.4k views

Arjun asked Feb 18, 2021

38 votes

4 answers

5

GATE CSE 2007 | Question: 17
Consider the following statements about user level threads and kernel level threads. Which one of the following statements is FALSE? Context switch time is longer for kernel level threads than for user level threads. User level threads do ... be scheduled on different processors in a multi-processor system. Blocking one kernel level thread blocks all related threads.

Consider the following statements about user level threads and kernel level threads. Which one of the following statements is FALSE?Context switch time is longer for kern...

Kathleen

21.3k views

Kathleen asked Sep 21, 2014

48 votes

7 answers

6

GATE CSE 2017 Set 1 | Question: 18
Threads of a process share global variables but not heap heap but not global variables neither global variables nor heap both heap and global variables

Threads of a process shareglobal variables but not heapheap but not global variablesneither global variables nor heapboth heap and global variables

Arjun

17.2k views

Arjun asked Feb 14, 2017

6 votes

1 answer

7

GO Classes Test Series 2024 | Mock GATE | Test 12 | Question: 8
Consider the following program execution involving 2 threads accessing the shared variable a which has been initialised to $0.$ Which of the following statement(s) is/are correct? Both threads will never finish execution ... threads will always finish execution Either both threads will finish, or none of them of will finish execution

Consider the following program execution involving 2 threads accessing the shared variable a which has been initialised to $0.$Which of the following statement(s) is/are ...

GO Classes

628 views

GO Classes asked Jan 21

4 votes

2 answers

8

GO Classes Test Series 2024 | Mock GATE | Test 11 | Question: 19
Consider three concurrently executing threads in the same process using two semaphores $\text{s}1$ and $\text{s2}.$ Assume $\text{s1}$ has been initialized to $1$, while $\text{s2}$ has been initialized to $0.$ ... ); /* thread C */ P(s1); x = x+3; V(s2); V(s1); $6$ $12$ $18$ $36$

Consider three concurrently executing threads in the same process using two semaphores $\text{s}1$ and $\text{s2}.$ Assume $\text{s1}$ has been initialized to $1$, while ...

GO Classes

585 views

GO Classes asked Jan 13

4 votes

0 answers

9

GO Classes Test Series 2024 | Mock GATE | Test 11 | Question: 45
Consider the scenario where $\text{L}$ is a shared variable which is a pointer to the head of a linked list originally containing three nodes with keys $3, 4,$ and $5.$ Consider the function List_Insert() which is being used by two concurrent threads $\text{T}1$ ... are separated by commas. $6,3,4,5$ $6,2,3,4,5$ $2,6,3,4,5$ $2,3,4,5$

Consider the scenario where $\text{L}$ is a shared variable which is a pointer to the head of a linked list originally containing three nodes with keys $3, 4,$ and $5.$ C...

GO Classes

364 views

GO Classes asked Jan 13

0 votes

1 answer

10

ISRO 2024
Which of the following multithreading model is followed in Linux OS? One User Thread mapping to One Kernel Thread Many User Threads mapping to One Kernel Thread One User Thread mapping to Many Kernel Threads Many User Threads mapping to Many Kernel Threads

Which of the following multithreading model is followed in Linux OS?One User Thread mapping to One Kernel ThreadMany User Threads mapping to One Kernel ThreadOne User Thr...

Ramayya

197 views

Ramayya asked Jan 7

54 votes

3 answers

11

GATE CSE 2011 | Question: 16, UGCNET-June2013-III: 65
A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following statement is correct? OS ... thread OS does not maintain virtual memory state for each thread OS does not maintain a separate stack for each thread

A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to th...

go_editor

17.3k views

go_editor asked Sep 29, 2014

0 votes

1 answer

12

Test Series
$\text{ Anyone please explain : }$

$\text{ Anyone please explain : }$

Rahhul A

297 views

Rahhul A asked Nov 13, 2023

0 votes

2 answers

13

deadlocks and threads operating system
A system has 5 process and 3 resources (A, B, C). The maximum count of resources are (10, 5, 7). Consider the following table of resource allocation. MAX (A B C) Allocated (A B C) P0 7 5 3 0 1 0 P1 3 2 2 2 0 0 P2 9 0 2 3 0 2 P3 2 ... these is a safe sequence in Question 13? P1, P3, P4 , P0, P2 only P2, P4, P3, P1, P0 only Both a and b None are safe sequences

A system has 5 process and 3 resources (A, B, C). The maximum count of resources are (10, 5, 7). Consider the following table of resource allocation. MAX(A B C)Alloc...

roopkathaaa

1.6k views

roopkathaaa asked Sep 2, 2023

0 votes

1 answer

14

deadlocks and threads operating system
Which of the following is false about User threads? User threads can switch fast since it does not involve kernel. User threads are lightweight since they do not require system calls. Kernel is not aware of the behavior of every user threads i.e. if it is blocking or runnable. None of these

Which of the following is false about User threads? User threads can switch fast since it does not involve kernel. User threads are lightweight since they do not require ...

roopkathaaa

267 views

roopkathaaa asked Sep 2, 2023

0 votes

1 answer

15

daedlocks and threads operating system
Suppose we want to synchronize two concurrent process P and Q using binary semaphore S and T. Process P: Process Q: while(1){ while(1){ W: Y: print 0'; print 1'; print 0'; print 1'; X: Z: } Synchronization statements can be inserted only at points W,X,Y,Z. Which of the ... S = T= 1 d. W : P(S) X : V(S) Y : P(T) Z: V(T) and initially S = 1 and T= 0

Suppose we want to synchronize two concurrent process P and Q using binary semaphore S and T.Process P: Process Q: while(1){ ...

roopkathaaa

301 views

roopkathaaa asked Sep 2, 2023

0 votes

1 answer

16

deadlocks and threads operating system
State true or false. Deadlock detection is possible using the allocation and request matrices alone. A way to recover from deadlock is to take away the resource from one of the processes or to kill the process itself. Banker's algorithm is ... deadlocks by analyzing the unsafe states. True, True, False False, True, True True, False, True False, True, False

State true or false.Deadlock detection is possible using the allocation and request matrices alone.A way to recover from deadlock is to take away the resource from one of...

roopkathaaa

838 views

roopkathaaa asked Sep 2, 2023

2 votes

4 answers

17

NIELIT 2017 DEC Scientific Assistant A - Section B: 9
Operating System maintains the page table for : each process each thread each instruction each address

Operating System maintains the page table for :each processeach threadeach instructioneach address

admin

17.4k views

admin asked Mar 31, 2020

1 votes

1 answer

18

DRDO CSE 2022 Paper 2 | Question: 5
The figure shown below indicates a thread's movement between $3$ states (i.e., run, ready, and blocked). Explain what causes each arrow? Say $\text{N/A}$ if it doesn't happen.

The figure shown below indicates a thread's movement between $3$ states (i.e., run, ready, and blocked). Explain what causes each arrow? Say $\text{N/A}$ if it doesn't ha...

admin

400 views

admin asked Dec 15, 2022

0 votes

3 answers

19

#fork #threads
Consider the following program segment of C-programming language: #include<stdio.h> int main() { if (fork() || fork()) fork(); printf("GATE\n"); return 0; } Number of times the above program prints 'GATE' is_?

Consider the following program segment of C-programming language:#include<stdio.h int main() { if (fork() || fork()) fork(); printf("GATE\n"); return 0; } Number of times...

jayadev

996 views

jayadev asked Feb 1, 2022

27 votes

4 answers

20

GATE IT 2004 | Question: 14
Which one of the following is NOT shared by the threads of the same process ? Stack Address Space File Descriptor Table Message Queue

Which one of the following is NOT shared by the threads of the same process ?StackAddress SpaceFile Descriptor TableMessage Queue

Ishrat Jahan

14.0k views

Ishrat Jahan asked Nov 1, 2014

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