Operating Systems - Process vs Thread - Key Differences
Consider a multithreaded program where one thread modifies a shared variable without synchronization. What is the most likely outcome when the CPU switches between threads?
Consider a multithreaded program where one thread modifies a shared variable without synchronization. What is the most likely outcome when the CPU switches between threads?
medium🧠🧾 Concept Trace Q4 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand shared memory in threads
Threads share the same memory, so variables are accessible by all threads.Step 2: Analyze unsynchronized access
Without synchronization, concurrent writes can cause race conditions and inconsistent values.Step 3: Evaluate options
The shared variable may become inconsistent due to race conditions correctly identifies the risk of inconsistency due to race conditions.Final Answer:
Option B -> Option BQuick Check:
Unsynchronized shared access causes race conditions [OK]
Quick Trick: Unsynchronized shared variables cause race conditions [OK]
Common Mistakes:
MISTAKES- Assuming CPU automatically locks shared variables
- Believing each thread has separate copies of variables
Trap Explanation:
PITFALL- Candidates often think shared memory guarantees consistency without locks.
Interviewer Note:
CONTEXT- Checks understanding of thread memory sharing and synchronization necessity.
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