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System calls, Processes, Threads, Inter‐process communication, Concurrency and synchronization. Deadlock. CPU scheduling. Memory management and Virtual memory. File systems. Disks is also under this

$$\scriptsize{\overset{{\large{\textbf{Mark Distribution in Previous GATE}}}}{\begin{array}{|c|c|c|c|c|c|c|c|}\hline
\textbf{Year}&\textbf{2024-1} & \textbf{2024-2} &\textbf{2023}&  \textbf{2022} & \textbf{2021-1}&\textbf{2021-2}&\textbf{Minimum}&\textbf{Average}&\textbf{Maximum}
\\\hline\textbf{1 Mark Count} &2&2&3& 2 &4&2&2&2.5&4
\\\hline\textbf{2 Marks Count} & 4&4&3&4 &1&3&1&3.16&4
\\\hline\textbf{Total Marks} & 10&10&9&10 &6&8&\bf{6}&\bf{8.83}&\bf{10}\\\hline
\end{array}}}$$

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Recent questions in Operating System

#3221
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1 answers
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GB Gatebook_Mocktest2(OS)
Which of the following statements is FALSE?(A) Each thread has own stack(B) Starvation implies deadlock(C) Smaller page size increases the page table size(D) User level process can not modify its own page table entries
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#3222
3.0k
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1 answers
1 votes
frame size != page size
Consider a system with 2 level paging applicable the page table is divided into 8K pages each of size 16KB. The memory is byte addressable if the physical address ... inner and outer page table.How can frame size and page size be unequal?
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#3223
2.7k
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1 answers
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which of the following is true..??
Consider the following statements:S1 : Increasing the number of page frames allocated to a process sometime increase the page fault rate in FIFO page replacement policy ... trueC) Both S1 and S2 are trueD) Neither S1 and S2 are true
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#3224
1.1k
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4 answers
3 votes
Gatebook_Mocktest2(Operating Systems)
Process executes the following codefor (i=0;i<5,i++) for (j=0;j<5,j++) fork(); The no of child processes created is ?
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#3225
212
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0 answers
0 votes
Scheduling
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#3226
1.8k
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2 answers
2 votes
Maximum File Size
I am getting 282. Answer given is 256..??
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#3227
466
views
1 answers
0 votes
How large of a disk can this file system support
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#3228
509
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0 answers
0 votes
ACE test
How can this be true...? I guess answer is b
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#3229
1.8k
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0 answers
0 votes
Semaphore
Let S be the binary semaphore variable S = 0 initially. Assume that no blocked processes exist in the system. The following signal (V), wait (P) operations are performed. The number of blocked ... 4 P, 6 V, 9 P, 13 V, 14 P
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#3230
4.1k
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2 answers
0 votes
Self Doubt (Semaphores)
struct Semaphore { enum value(0,1); Queue type L; } Down (Semaphore S) { if(S.value==1) { S.value=0; } else { put process(PCB) in S.L; sleep(); } } Up( ... part of Up and wakes P1 up. Now how will P1 enter the CS, since S.value is still 0?
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#3231
811
views
1 answers
1 votes
demand paging
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#3232
710
views
2 answers
2 votes
Memory management
(a) P3, Ps, P3, P2 (b)P2, P5, P3, 426k waits (c)P3, Ps, P2, 426k waits (d)P4, P2, P5, P3
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#3233
577
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2 answers
1 votes
Memory Management
Reply with solution as soon as possible...
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#3234
1.5k
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1 answers
1 votes
starvation
I'm looking for an explanation for thisSince no bounded waiting means a process waits while others can enter the system hence that process is starving and ... waitingI think I might be missing something so can you please highlight that
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#3235
1.2k
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1 answers
0 votes
memory allocation best fit..
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#3236
644
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2 answers
0 votes
Gate Practice
Q.1 VAS = 46 bit , Page size = 4KB , Page table entry = 4B ,3 level paging used ,1st level =12bits, 2nd level = 12bits,3rd level=10 bits(from right to left)Page ... level paging 1st = 12 bit ,2nd = 12 bit , 3rd = 10 bit Page table size.??
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#3237
485
views
1 answers
2 votes
CPU Utilization
What are the factors to improve CPU Utilization? List Them.
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#3238
516
views
1 answers
0 votes
NPTEL-Operating System-Week1-Quiz-2-Q14
State True or False . Please explain in 2 or 3 sentencesTemporal locality states if a page is accessed, then there is a high chance that the nearby pages will be accessed.
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#3239
1.1k
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1 answers
0 votes
NPTEL-Design and Analysis of Algorithms-Week1-Quiz-2-Q12
State true or false. When a user encounters a page fault, 1) The user application informs the OS, 2) User uses API calls to the hardware Memory Management ... unit brings the page from hard disk to main memory. Is Statement 2 correct ?
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#3240
1.0k
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1 answers
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NPTEL-Operating System,-Week2-Quiz-2-Q5
In the Contiguous allocation for disk blocks, files cannot grow dynamically because _______The next block could be occupied by another fileThe scheme does not allow files to ... spaceI think both 1 and 2 are correct . What do you say ?
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