[Solved] Which part of a B-tree index helps quickly find the data location? — Ans: The root and internal nodes guide the search path. | SQL

SQL - Indexes and Query Performance

Which part of a B-tree index helps quickly find the data location?

AThe index stores data in a random order.

BThe leaf nodes store the entire table data.

CThe root and internal nodes guide the search path.

DThe index duplicates all data in the table.

Step-by-Step Solution

Solution:

Step 1: Identify B-tree structure roles
The root and internal nodes contain keys that guide the search to the correct leaf node.
Step 2: Eliminate incorrect options
Leaf nodes store pointers, not full data; data is ordered, not random; index does not duplicate all data.
Final Answer:
The root and internal nodes guide the search path. -> Option C
Quick Check:
B-tree nodes guide search = Root/internal nodes [OK]

Quick Trick: Root and internal nodes guide search in B-tree [OK]

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