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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

$$\scriptsize{\overset{{\large{\textbf{Mark Distribution in Previous GATE}}}}{\begin{array}{|c|c|c|c|c|c|c|c|}\hline
\textbf{Year}& \textbf{2022} & \textbf{2021-1}&\textbf{2021-2}&\textbf{2020}&\textbf{2019}&\textbf{2018}&\textbf{2017-1}&\textbf{2017-2}&\textbf{2016-1}&\textbf{2016-2}&\textbf{Minimum}&\textbf{Average}&\textbf{Maximum}
\\\hline\textbf{1 Mark Count} & 2 &4&2&2&2&3&2&2&1&1&1&2.1&4
\\\hline\textbf{2 Marks Count} & 4 &1&3&4&4&3&2&2&4&3&1&3&4
\\\hline\textbf{Total Marks} & 10 &6&8&10&10&9&6&6&9&7&\bf{6}&\bf{8.1}&\bf{10}\\\hline
\end{array}}}$$

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Highest voted questions in Operating System

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GATE CSE 2015 Set 2 | Question: 23
A system has $6$ identical resources and $N$ processes competing for them. Each process can request at most $2$ requests. Which one of the following values of $N$ could lead to a deadlock? $1$ $2$ $3$ $4$
A system has $6$ identical resources and $N$ processes competing for them. Each process can request at most $2$ requests. Which one of the following values of $N$ could l...
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49 votes
4 answers
71
GATE CSE 2001 | Question: 2.21
Consider a machine with $64$ MB physical memory and a $32$-bit virtual address space. If the page size s $4$ KB, what is the approximate size of the page table? $\text{16 MB}$ $\text{8 MB}$ $\text{2 MB}$ $\text{24 MB}$
Consider a machine with $64$ MB physical memory and a $32$-bit virtual address space. If the page size s $4$ KB, what is the approximate size of the page table?$\text{16 ...
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48 votes
7 answers
72
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
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48 votes
6 answers
73
GATE CSE 2015 Set 1 | Question: 9
The following two functions $P1$ and $P2$ that share a variable $B$ with an initial value of $2$ ... $B$ can possibly take after the execution is______________________.
The following two functions $P1$ and $P2$ that share a variable $B$ with an initial value of $2$ execute concurrently.$$\begin{array}{|l|l|}\hline \text{P1() \{ } & \tex...
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47 votes
5 answers
78
GATE CSE 1995 | Question: 2.6
The sequence __________ is an optimal non-preemptive scheduling sequence for the following jobs which leaves the CPU idle for ________ unit(s) of time. ... $\{2, 1, 3\}, 0$ $\{3, 2, 1\}, 0$ $\{1, 2, 3\}, 5$
The sequence __________ is an optimal non-preemptive scheduling sequence for the following jobs which leaves the CPU idle for ________ unit(s) of time.$$\small \begin{arr...
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47 votes
6 answers
79
GATE CSE 2012 | Question: 31
Consider the $3$ processes, $P1, P2$ and $P3$ ... $P1, P3, P2$ FCFS: $P1, P2, P3$ RR2: $P1, P3, P2$ FCFS: $P1, P3, P2$ RR2: $P1, P2, P3$
Consider the $3$ processes, $P1, P2$ and $P3$ shown in the table. $$\small \begin{array}{|c|c|c|} \hline \textbf{Process} & \textbf{Arrival Time} & \textbf{Time Units Req...
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