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19CS405-Operating System

19CS405-Operating System

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Which scheduling algorithm associates the length of a process's next CPU burst and assigns the CPU to the process with the smallest next CPU burst when available?

First-Come, First-Served

Priority Scheduling

Shortest Job First

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What feature characterizes a multitasking operating system like Linux?

Limits the number of programs that can be executed

Allows multiple programs to run concurrently

Allows only one program to run at a time

Executes programs in sequence based on their arrival time

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How is interrupt latency typically defined in a computing system?

Time taken for an interrupt to arrive from an external source

Time from arrival of interrupt to start of routine that services interrupt

Time taken to complete the interrupt service routine

Time from the start of the interrupt service routine to its completion

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What feature characterizes a priority-based CPU scheduling algorithm?

Associating an arrival time with each process

Assigning a small unit of CPU time to each process

Preempting processes based on their execution time

Associating an integer priority number with each process

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How does virtual memory benefit programmers in terms of memory availability?

Frees programmers from worrying about the amount of physical memory available

Reduces the need for secondary storage devices

Requires programmers to manage physical memory explicitly

Eliminates the need for programming languages

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What does the Page-table base register (PTBR) do in memory management?

Stores the current process ID

Points to the page table

Controls the instruction pointer

Manages the CPU cache

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As the number of frames increases, what typically happens to the number of page faults?

It decreases to some minimal level

It fluctuates unpredictably

It increases linearly

It remains constant

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Which scheduling algorithm typically assigns a small unit of CPU time (time quantum q) to each process and preempts the process after this time, moving it to the end of the ready queue?

First-Come, First-Served

Priority Scheduling

Shortest Job First

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How is the basic method for implementing paging defined in memory management?

Dividing physical memory into variable-sized blocks called pages

Breaking physical memory into fixed-sized blocks called frames and logical memory into blocks of the same size called pages

Dividing logical memory into variable-sized blocks called frames

Breaking physical memory into variable-sized blocks called frames

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When does external fragmentation occur in memory management?

When available spaces are contiguous

When memory spaces are allocated optimally

when there is enough total memory space to satisfy a request but the available spaces are not contiguous

When there is insufficient memory space

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