[Solved] Why does the following infinite loop script sometimes consume 100% CPU?while true; do :; done - Ans: Because it runs without any pause or sleep, using full CPU | Bash Scripting

Bash Scripting - Loops

Why does the following infinite loop script sometimes consume 100% CPU?

while true; do :; done

ABecause ':' command is invalid and causes error

BBecause 'done' is missing

CBecause 'true' is not a valid condition

DBecause it runs without any pause or sleep, using full CPU

Step-by-Step Solution

Solution:

Step 1: Understand the loop behavior
Loop runs endlessly executing ':' which does nothing but returns success immediately.
Step 2: Reason CPU usage
Since no sleep or wait, loop runs as fast as possible, consuming full CPU.
Final Answer:
Because it runs without any pause or sleep, using full CPU -> Option D
Quick Check:
Infinite loops without delay use 100% CPU [OK]

Quick Trick: Add sleep to infinite loops to reduce CPU usage [OK]

Common Mistakes:

MISTAKES

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