Interested to Buy Any Domain ? << Click Here >> for more details...
what is mutex?
- 4 Answers
- 10424 Views
- Axiom, Blue Star, SQL Star, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rock star
Mutual exclusion (often abbreviated to mutex) algorithms are
used in concurrent programming to avoid the simultaneous use
of a common resource, such as a global variable, by pieces
of computer code called critical sections.
Examples of such resources are fine-grained flags, counters
or queues, used to communicate between code that runs
concurrently, such as an application and its interrupt
handlers. The problem is acute because a thread can be
stopped or started at any time.
To illustrate: suppose a section of code is mutating a piece
of data over several program steps, when another thread,
perhaps triggered by some unpredictable event, starts
executing. If this second thread reads from the same piece
of data, the data, in the process of being overwritten, is
in an inconsistent and unpredictable state. If the second
thread tries overwriting that data, the ensuing state will
probably be unrecoverable. These critical sections of code
accessing shared data must therefore be protected, so that
other processes which read from or write to the chunk of
data are excluded from running.
A mutex is also a common name for a program object that
negotiates mutual exclusion among threads, also called a lock.
| Is This Answer Correct ? | 8 Yes | 3 No |
Answer / nadeem khokhar
A mutex and the binary semaphore are essentially the same. Both can take values: 0 or 1. However, there is a significant difference between them that makes mutexes more efficient than binary semaphores.
A mutex can be unlocked only by the thread that locked it.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / sunildummati
Short for mutual exclusion object. In computer
programming, a mutex is a program object that allows
multiple program threads to share the same resource, such
as file access, but not simultaneously. When a program is
started, a mutex is created with a unique name. After this
stage, any thread that needs the resource must lock the
mutex from other threads while it is using the resource.
The mutex is set to unlock when the data is no longer
needed or the routine is finished.
(2) When spelled MuTeX, a package of macros for the TeX
typesetting system that supports musical notation. MuTeX
was written by Andrea Steinbach and Angelika Schofer, as a
master's thesis at Rheinische Friedrich-Wilhelms
University.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / rajesh verma
A Mutex is a mutually exclusive flag. It acts as a gate keeper to a section of code allowing one thread in and blocking access to all others. This ensures that the code being controled will only be hit by a single read at a time. Just be sure to release the mutex when you are
| Is This Answer Correct ? | 0 Yes | 0 No |
What are events in smartforms?
Is there any standard procedure to test the application as a whole? Or How can I test complete application right from the requirement gathering?
what you mean by mantis in IT interview? why we use mantis? advantage of mantis?
What is the language used for Artificial Intelligence?
Why did you ever become involved in QA/testing?
What is the Super Class of Exception in java?
11 Answers Andesa Services, Benchmark, CitiGroup, CMC, Evergent, KOT Systems, Value Labs, Vijay infoart Solutions,
any drawback are there in mantis?
why main() method should not return any value
WHAT IS MAIN IMPORTANT THING IN SOFTWARE?
SYNFOSYS PLACEMENT PAPER 2010 Hi Friends I have attended the recent synfosys test 2010. Here r some questions which i remember. Section – I 1) There are 12 balls weigh similar but one is dissimilar (more/less). How to find the dissimilar ball with minimum no of weighs? 2) There r 7people carrying 7bags. Each bag contains 7cats. Each cat has 7small cats. How many total legs r there? 3) There are 12 balls weigh similar but one is dissimilar (more/less). How to find the dissimilar ball with minimum no of weighs? 4) 5) There r 2 poles each 15 meters high. A cable of length 16 meters is tied between pillars top. For its maximum the cable lies down above 7mts high from the ground. What is the distance between pillars? ------------------------------------------------------------ ------------------------------------------------ Section -II What is the value of 11^5 Some Other quetions ------------------------------------------------------------ ------------------------------------------------ Section - III 16) Serialization and deserialization? 17) Will finally block execute even though there is an exception & return statement are there in catch block? Explain? 18) memory leak? How can we avoid it? 19) virtual destructor? 20) Two program codes for code optimization? ------------------------------------------------------------ ------------------------------------------------ Section – IV Q) Program for finding the alternate digits of the number If number is 35846 then Sum1=3+8+6=17 Sum2=5+4=9 Q) Program for Single linked list? ------------------------------------------------------------ ------------------------------------------------ Section - V Q) What is software engineering? Explain SDLC Q) Explain any two upcoming IT Scenarios? ------------------------------------------------------------ ------------------------------------------------ Regards Gopinath Allanku +91 9885457211
HOW TO BREAK THE FIREWALL?
I m Abdullah Ansari compleated MCA from Jamia Hamdard,i have appeared the test of IBM on 2 august at oxford college of engineering Bangalore.waiting for hr round.. This is the first round for IBM.02/08/08 Paper consists of 4 sections 15 questions from matrices(time very less but no negative marking). 25 questions from series completion section (this section is very easy but negative marking) 15 questions from aptitude(little bit tough time limit 15 minute negative marking) 4th section is from computer science (c,c++,operating system,digital electronics ,basic question..) result came at 3 o'clock.i was selected... In interview they asked questions like 1 they asked about final yr project.. 2 what are dynamic and static memory location? 3 linked list and array difference between them. 4 what is function ? what is difference betwen function and inline function? 5 about structure 6 about binary tree, traversal, call by value. 7 storage class and many more basic questions..
C 
