Linux Kernel Interview Questions
- 0of 0 votes
AnswersY can't user mode helper function execute ls command .
- bhargavmtie December 28, 2017 in India for Drivers
It is executing my application and even power off command.
Please let me know how user mode helper function works briefly...| Report Duplicate | Flag | PURGE
xyz Linux Kernel - 0of 2 votes
AnswersWhat is bottom halves and Top half.? Whats their functionality?
- mayur_nandurkar February 10, 2015 in United States| Report Duplicate | Flag | PURGE
Linux Kernel - 2of 2 votes
AnswersTo deploy a module inside kernel, what are the possible methods.? Mention actual difference among them.
- mayur_nandurkar January 12, 2015 in India| Report Duplicate | Flag | PURGE
Developer Program Engineer Linux Kernel - 0of 0 votes
Answersin how many ways we can assign a major minor number to any device?
- mayur_nandurkar January 05, 2015 in India| Report Duplicate | Flag | PURGE
Linux Kernel - 3of 3 votes
AnswersWhen is that we we want to use "user virtual address" instead of "kernel virtual address"? List some situations when we cannot go with kernel virtual address.
- chvishu87 April 06, 2013 in United States| Report Duplicate | Flag | PURGE
Qualcomm Software Engineer / Developer Linux Kernel - 0of 2 votes
AnswersHow mb differ from wmb in Linux? Is mb equal to wmb & rmb ?
- bvgr January 02, 2013 in United States| Report Duplicate | Flag | PURGE
Linux Kernel - 3of 3 votes
AnswersAs kernel can access user space memory, why should copy_from_user is needed?
- bvgr December 24, 2012 in United States| Report Duplicate | Flag | PURGE
Qualcomm Software Engineer / Developer Linux Kernel - 1of 1 vote
Answerswhat are the best synchronization techniques used in linux kernel?
- bvgr December 24, 2012 in United States| Report Duplicate | Flag | PURGE
Qualcomm Software Engineer / Developer Linux Kernel - -1of 1 vote
Answershow function pointers are shared across different processes? using which iPCs?
- bvgr November 25, 2012 in India| Report Duplicate | Flag | PURGE
Qualcomm Linux Kernel - -1of 1 vote
Answersis linux kernel a process / thread/ something else
- bvgr November 25, 2012 in India| Report Duplicate | Flag | PURGE
Qualcomm Linux Kernel - 0of 0 votes
Answershow a function from one user process can be called in other user process?
- bvgr November 24, 2012 in India| Report Duplicate | Flag | PURGE
Qualcomm Linux Kernel - -1of 1 vote
Answersmention 4 IPCs used in user level process in linux
- bvgr November 24, 2012 in India| Report Duplicate | Flag | PURGE
Qualcomm Linux Kernel - 0of 0 votes
Answerswrite a program with 2 threads. one thread should print even and other should print odd numbers in sequence. how would you make it SMP safe?
- bvgr November 24, 2012 in India| Report Duplicate | Flag | PURGE
Qualcomm C Linux Kernel - 1of 1 vote
Answersbelow questions were asked to me:
- bvgr November 24, 2012 in India
1. explain device tree concepts in linux.| Report Duplicate | Flag | PURGE
Qualcomm Linux Kernel - -1of 1 vote
Answerwhat is diffarence between semop and semctl?
- nagendragurajarapu September 18, 2012 in United States
we can change the semaphores using both apis?what is the diffarence?| Report Duplicate | Flag | PURGE
Ericsson Developer Program Engineer Linux Kernel - 1of 1 vote
Answershow to manage memory in linux kernel?
- baxiandaren July 22, 2012 in India| Report Duplicate | Flag | PURGE
Juniper Networks Software Development Manager Linux Kernel - 0of 0 votes
Answerswhat is bus error? common causes of bus errors?
- Itcecsa June 10, 2012 in United States| Report Duplicate | Flag | PURGE
Bloomberg LP Financial Software Developer Linux Kernel - -1of 1 vote
Answerswhat is memory leak ?
- gauravsharma29 May 12, 2012 in India| Report Duplicate | Flag | PURGE
Hewlett Packard Consultant Linux Kernel - -2of 2 votes
Answerswhich process / directory is responsible for the kernel is decompresed during boot up ?
- gauravsharma29 May 12, 2012 in India| Report Duplicate | Flag | PURGE
Hewlett Packard Consultant Linux Kernel - 1of 1 vote
Answersgiven a pid, how will you distinguish if it is a process or a thread ?
- gauravsharma29 May 12, 2012 in India| Report Duplicate | Flag | PURGE
Hewlett Packard Consultant Linux Kernel - 1of 1 vote
AnswersWhat is the difference between kill-6 and kill -9
- neshg April 09, 2012 in India| Report Duplicate | Flag | PURGE
Linux Kernel - 0of 0 votes
Answers2. how we can modify the default behaviour of setsockopt() parameters
- anonymous March 02, 2012 in India for Bangalore| Report Duplicate | Flag | PURGE
Qualcomm Technical Architect Linux Kernel - 1of 1 vote
Answers1. describe the steps to add a new global sysctl() or fnctl() paramater.
- anonymous March 02, 2012 in India for Bangalore| Report Duplicate | Flag | PURGE
Qualcomm Technical Architect Linux Kernel - -1of 1 vote
AnswersHow can make Mutex global to All CPUs in your Board? Because spinlock is global to all CPUs in SMP system. Just make Mutex work like spinlock?
- MLakshmana Rao August 03, 2011| Report Duplicate | Flag | PURGE
IBM Software Engineer / Developer Linux Kernel - 0of 0 votes
AnswersWhat are upper half and bottom half in device drivers.Why are they used?
- McAfee July 11, 2011| Report Duplicate | Flag | PURGE
McAfee Software Engineer / Developer Linux Kernel - 0of 0 votes
AnswersDifferenced between fork(),pthread() system calls.What is vfork().What is a file system how does kernel stores the data structure with respect to file system,he hinted to super blocks I was not much aware of super blocks etc in a file system,then I attempted for VFS kind of thing.
- McAfee July 11, 2011| Report Duplicate | Flag | PURGE
McAfee Software Engineer / Developer Linux Kernel - -1of 1 vote
AnswersWhat does the following command do in unix:
- Interviewee April 21, 2011
>ls a/b/c/./e/../f/./../g/./../h
Consider a,b,c....g,h to be folders| Report Duplicate | Flag | PURGE
Flipkart Software Engineer in Test Linux Kernel - 0of 0 votes
Answers1st Round interview:
- Harsh April 16, 2011
Command to sort the file contents in Linux| Report Duplicate | Flag | PURGE
Goldman Sachs Software Engineer / Developer Linux Kernel - -1of 1 vote
AnswersWrite code for page fault handler in Linux ( I have a project on this so may be I was asked)
- NVIDIA reject March 15, 2011| Report Duplicate | Flag | PURGE
NVIDIA Software Engineer / Developer C Linux Kernel