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Questions tagged [operating-systems]

Questions about the principles of software that interfaces between hardware and applications.

110 questions with no upvoted or accepted answers
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What are disadvantages of a Operating System that recognise file extensions ?

When Operating system recognise the file types It has several advantages like 1. avoid mistakes like trying to print a object file that produce garbage output but I can't think about disadvantages ...
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Operating Systems Qualifying Exam Visual Study Aids

I have read the Operating System Concepts book, watched a lot of videos on YouTube, practiced with past qualifying exam questions and several exams from other CS departments around the world. ...
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1answer
368 views

Effectiveness of TLB

This is a book question: Suppose that a machine has 48-bit virtual addresses and 32-bit physical addresses. Suppose this same system has a TLB (Translation Lookaside Buffer) with 32 ...
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Banker's Algorithm Question (Creating your own Available // Allocation)

Question: My question is, how or what is the best way to "determine" an Available and an allocation matrix such that it satisfies (1), and how to "prove" it. And the same for (2). I understand how to ...
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1answer
109 views

I have a question about resource alocation to avoid dead lock

In the code below, three processes are competing for six resources labeled A to F.How can I modify the get request in each procedure in this graph to avoid dead lock You cannot move requests ...
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2answers
7k views

How to compute total internal and external fragmentation

I want to find the total external and internal fragmentation. What I understand is that external fragmentation occurs when processes are loaded and removed from memory, causing memory to be broken ...
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2answers
13k views

Calculating disk seek times

I have a system where disk requests come to a disk drive for cylinders in the order 10, 22, 20, 2, 40, and 38 at a time when the disk drive is reading from cylinder 20. The seek time is 6ms per ...
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1answer
43 views

OS process management

Assume a process execution interrupted at the middle and CPU started executing a different process.How does the OS handle this situation?
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2answers
186 views

page fault while executing machine instruction

A process executing machine instruction Y right after machine instruction x.On executing x It causes a page fault. what is the next instruction that is executed immediately on restarting the process. ?...
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1answer
5k views

How to calculate page size of virtual memory

im new at OS and I want to know how to calculate the page size of this virtual memory system? Information: Physical Memory - 32 KB Virtual Address - 16 bit Offset - 12 bits Current ...