Register

Test by Bikram | Operating Systems | Test 2 | Question: 27

• edited by
214 views
1 votes
1 votes

A counting semaphore is initialized to $10$. The $6$ P(wait) operations and $4$ V(signal) operations were completed in this semaphore. The resulting value of semaphore is:

  1. $0$
  2. $8$
  3. $10$
  4. $12$
• edited by
User Avatar

1 Answer

Best answer
1 votes
1 votes
In P operation semaphore value is reduced by 1. In V operation semaphore value is increased by 1
 so the  resulting value of semaphore is : Initial value - number of P + number of V = (10 - 6 )+ 4 = 8
• selected by
User Avatar
Voting & Accepting an answer helps improve the community
Answer:
← PreviousNext →
← Previous in categoryNext in category →

Related questions

2 votes
2 votes
1 answer
1
Bikram asked Dec 26, 2016
278 views
Test by Bikram | Operating Systems | Test 2 | Question: 30
Consider the following 3 processes with 3 binary semaphores with initial values $S_{0}=0, S_{1}=0, S_{2}=1$ ... $3$ processes? $211$ $200$ $210$ $201$
Consider the following 3 processes with 3 binary semaphores with initial values $S_{0}=0, S_{1}=0, S_{2}=1$$$ \begin{array}{|c|c|c|} \hline \textbf{P} & \textbf{Q} & \tex...
User Avatar
2 votes
2 votes
3 answers
2
Bikram asked Dec 26, 2016
1,106 views
Test by Bikram | Operating Systems | Test 2 | Question: 29
In a paged memory, the page hit ratio is $0.35$. The time required to service the page fault is $100$ ns. Time required to access a page in primary memory is $10$ ns. The average time required to access a page is ________ ns
In a paged memory, the page hit ratio is $0.35$. The time required to service the page fault is $100$ ns. Time required to access a page in primary memory is $10$ ns.The ...
User Avatar
0 votes
0 votes
1 answer
4
Bikram asked Dec 26, 2016
356 views
Test by Bikram | Operating Systems | Test 2 | Question: 26
Consider a paging system with the page table in memory. Each memory reference takes $200$ ns. The TLB has hit ratio of $75 \%$ and the time to look for pages in TLB is almost negligible. What is the effective paged memory reference time in ns? $400$ $250$ $150$ $200$
Consider a paging system with the page table in memory. Each memory reference takes $200$ ns. The TLB has hit ratio of $75 \%$ and the time to look for pages in TLB is al...
User Avatar
Link Copied!