Race condition problem in Operating Systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the shared resource in a race condition scenario.

Operating Systems

shared_variable = [1]

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Athread

Bcounter

Clock

Dprocess

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'thread' or 'process' which are entities, not resources.

The shared resource in a race condition is typically a variable like counter that multiple threads access simultaneously.

2fill in blank

medium

Complete the sentence to explain what causes a race condition.

Operating Systems

A race condition occurs when multiple threads [1] a shared resource without proper synchronization.

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Aaccess

Block

Ccreate

Dterminate

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'lock' which is a solution, not the cause.

Race conditions happen when multiple threads access the same resource at the same time without controls.

3fill in blank

hard

Fix the error in the statement about race conditions.

Operating Systems

Race conditions happen when threads [1] a resource sequentially without synchronization.

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Aaccess concurrently

Block

Cterminate

Daccess

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'access' which implies any access, not necessarily concurrent.

Race conditions occur when threads access concurrently a resource without synchronization, not sequentially.

4fill in blank

hard

Fill both blanks to complete the code snippet that prevents race conditions using locks.

Operating Systems

lock = [1]()
lock.[2]()
# critical section code
lock.release()

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ALock

Bacquire

Cstart

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'run' which are unrelated to locking.

To prevent race conditions, a Lock object is created and its acquire method is called before entering the critical section.

5fill in blank

hard

Fill all three blanks to complete the explanation of race condition consequences.

Operating Systems

If threads [1] a shared resource [2] synchronization, it can lead to [3] results.

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Aaccess

Bwithout

Cunexpected

Dcreate

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'create' which does not fit the context.

When threads access a shared resource without synchronization, it can cause unexpected or incorrect results.