Elasticsearch - Search Results and Scoring
If a term appears in all documents in an index, how does the IDF component affect the TF-IDF score for that term?
If a term appears in all documents in an index, how does the IDF component affect the TF-IDF score for that term?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Recall IDF definition
IDF measures rarity; if a term is in all documents, IDF approaches zero.Step 2: Effect on TF-IDF score
Zero IDF means the term's TF-IDF score contribution is minimal, reducing its impact.Final Answer:
IDF becomes zero, reducing the term's impact -> Option BQuick Check:
Common terms have near-zero IDF = IDF becomes zero, reducing the term's impact [OK]
Quick Trick: Common terms get near-zero IDF, lowering score [OK]
Common Mistakes:
MISTAKES- Thinking IDF increases for common terms
- Ignoring IDF effect on TF-IDF
- Assuming IDF doubles TF
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