Greedy Algorithms - Task Scheduler (CPU Cooling)
In a Task Scheduler implementation, what common mistake causes incorrect minimum time calculation when multiple tasks have the same maximum frequency?
In a Task Scheduler implementation, what common mistake causes incorrect minimum time calculation when multiple tasks have the same maximum frequency?
medium🐞 Bug Q7 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify max frequency tasks
Multiple tasks can share the highest frequency.Step 2: Calculate idle slots correctly
Idle slots = (max_freq - 1) * (n + 1 - count_max_freq_tasks)Step 3: Common bug
Ignoring the count of max frequency tasks leads to underestimating idle slots and total time.Final Answer:
Option B -> Option BQuick Check:
Idle slots depend on number of max frequency tasks [OK]
Quick Trick: Include count of max frequency tasks in idle slot formula [OK]
Common Mistakes:
MISTAKES- Calculating idle slots as (max_freq - 1) * n only
- Ignoring multiple max frequency tasks in formula
Trap Explanation:
PITFALL- Ignoring multiple max frequency tasks looks simpler but causes wrong results
Interviewer Note:
CONTEXT- Tests attention to detail in cooldown idle time calculation
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