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Discuss Logical Plan vs Physical Plan

General/Otherhard0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
KPMG
Key Concepts Tested
joinoptimizationpartition
Expert AnswerPremium
47 wordsInterview-ready
**Logical Plan**: Abstract 'what'—filter, join, aggregate. Independent of execution. Optimizer applies rules (predicate pushdown, constant folding). **Physical Plan**: Concrete 'how'—which join algo (sort-merge, broadcast hash), partitioning, resource allocation. Cost-based choices. **Why Both**: Separation enables optimization without locking to implementation....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like KPMG. The answer also includes follow-up discussion points that interviewers commonly explore.

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