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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

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

Recent questions in Operating System

#3262
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Creating many threads is advisable than creating many processes. Which of the statements below do not support this claim?Threads can share the address ... between two threads.Context switching is faster for threads as compared to Processes
#3263
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0 answers
0 votes
State true or false. With Reason In a Micro-Kernel based OS, different modules communicate with each other using message passing. This is a secure way ... can directly call any other module. This, however, suffers from efficiency issues.
#3264
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2 answers
0 votes
Which of the following statements about Softwares is false?System Softwares provide an API that can be accessed by the Application Softwares.DBMS, Compilers, ... hardware/OS.System Softwares can control and coordinate the use of hardware.
#3265
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0 answers
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Consider four process all are arriving at time zero, with total execution time of 20, 10, 10 and 20 unit respectively. Each process spends the first 20% of execution ... id] (upto one decimal place)24.523.525.5None of theseMY ANSWER IS 24.
#3266
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1 answers
0 votes
Consider the following table :Assume all process arrived at same time. 1st process P1 stars execution from 0' time unit. Every process completes its CPU request ... AND ". Process are scheduled using SJF for CPU service "??anyone help?
#3267
1.8k
views
2 answers
4 votes
In particular unix OS each data block is of size 1024 bytes each node has 10 direct data blocks and 2-additional addresses one for single indirect block and one for ... file system (in KB) is ?My answer:282answer given 256.? anyone help.
#3268
363
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2 answers
2 votes
in case of shortest remaining time first(SRTF) .we always consider pre-emptive scheduling??
#3269
456
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1 answers
0 votes
# i got 2 and 3 is correct. pplz explain 1st ???
#3270
252
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0 answers
0 votes
consider a paging system with 48 bit virtual address.each address defers to a byte in memory.Suppose the size of page is 16KB and the main memory size is 16 GB. The ... protection bits is (in GB)a. 44 GBb. 48 GBc. 20 GBd.none of above
#3272
667
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0 answers
0 votes
Consider a program which needs to be run on a Round-Robin Scheduling algorithm Size of program is 200Kb and it has been stated that hard disk has a ... is 10ms. The acceptable time quantum for effective CPU utilization is _____(ms.)
#3273
916
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2 answers
1 votes
consider a paging system with 48bit virtual address space.Each address defers to a byte in memory.suppose the size of page is 16KB and the main memory size is 16GB.The ... as 48GB or shuld i keep it as it is and write the answer as 44GB?
#3274
6.4k
views
3 answers
1 votes
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 ... V, 9 P, 13 V, 14 PAnswer given is 13 How? I am getting 8.
#3275
278
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0 answers
0 votes
Consider the below solution to two process mutual exclusion problem:-Program for Pi:Program for Pj:Do{Do{P: Flag[i]=true; A: Flag[j]= ... waiting.How many statements are correct?S1 is false i know plz explain statement S2 and S3
#3276
420
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1 answers
1 votes
#3277
1.1k
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1 answers
0 votes
Consider the following segment:int count = 0;void tally( ){for(int i=1;i<=5;i++)count=count+1;}main(){parbegintally();tally();parend} Note: Assume the count ... of both functions of tally( ), The minimum final values of count is.....?
#3278
318
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1 answers
0 votes
Consider a disk with 80 GB. The size of disk block is 8 kB. Number of blocks needed to keep track of free space ifthe disk is initially empty by using bit map method is _____a. 150b. 165c. 160d. None of these
#3279
289
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0 answers
0 votes
A certain processor takes 10 ns on a cache hit and 500 μs on a cache miss to read on instruction. 10% of the time the read request is found in the ... average access time ?here I used default case but answer given is using strict hierachy.
#3280
354
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0 answers
0 votes