Thrashing and working set model in Operating Systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the sentence to define thrashing.

Operating Systems

Thrashing occurs when a system spends most of its time [1] pages rather than executing processes.

Drag options to blanks, or click blank then click option'

Aswapping

Bloading

Cwriting

Dallocating

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'loading' because it sounds similar to swapping.

Thrashing happens when the system spends too much time swapping pages in and out of memory instead of running actual processes.

2fill in blank

medium

Complete the sentence to explain the working set model.

Operating Systems

The working set model tracks the set of pages a process has used in the last [1] time units.

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Arandom

Bfixed

Crecent

Dinfinite

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'fixed' because it sounds like a set size.

The working set model focuses on the pages a process has used recently to decide which pages to keep in memory.

3fill in blank

hard

Fix the error in the sentence about thrashing.

Operating Systems

Thrashing happens when the CPU is mostly idle due to [1] page faults.

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Aexcessive

Brandom

Cno

Dfew

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'few' because it seems less severe.

Thrashing is caused by excessive page faults, which keep the CPU busy handling memory instead of running processes.

4fill in blank

hard

Fill both blanks to describe the working set window and its purpose.

Operating Systems

The working set window is a [1] of time used to determine the [2] of pages a process needs.

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Afixed interval

Bnumber

Cset

Dvariable size

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'variable size' because it sounds flexible.

The working set window is a fixed interval of time used to find the set of pages a process currently needs in memory.

5fill in blank

hard

Fill all three blanks to complete the explanation of thrashing prevention.

Operating Systems

To prevent thrashing, the system must [1] the number of [2] and ensure the [3] fits in memory.

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Alimit

Bprocesses

Cworking set

Dincrease

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'increase' instead of 'limit' for the first blank.

Preventing thrashing involves limiting the number of processes and making sure each process's working set fits in memory.