Bird
0
0

What is the primary advantage of using indexes in a database?

easy📝 Conceptual Q1 of 15
SQL - Indexes and Query Performance
What is the primary advantage of using indexes in a database?
AThey reduce the size of the database
BThey speed up data retrieval operations
CThey automatically backup the data
DThey encrypt the stored data
Step-by-Step Solution
Solution:

  1. Step 1: Understand Index Purpose

    Indexes are designed to improve query performance by allowing faster data lookup.

  2. Step 2: Analyze Options

    Only They speed up data retrieval operations correctly states the main benefit: speeding up data retrieval.

  3. Final Answer:

    They speed up data retrieval operations -> Option B

  4. Quick Check:

    Indexes improve query speed [OK]
Quick Trick: Indexes improve query speed by optimizing lookups [OK]
Common Mistakes:
  • Thinking indexes reduce database size
  • Assuming indexes provide automatic backups
  • Believing indexes encrypt data

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More SQL Quizzes
CASE Expressions - CASE in SELECT for computed columns - Quiz 7medium Indexes and Query Performance - How an index works (B-tree mental model) - Quiz 15hard Stored Procedures and Functions - User-defined functions - Quiz 8hard Transactions and Data Integrity - COMMIT and ROLLBACK behavior - Quiz 6medium Transactions and Data Integrity - Read phenomena (dirty reads, phantom reads) - Quiz 4medium Transactions and Data Integrity - Transaction isolation levels - Quiz 2easy Transactions and Data Integrity - Read phenomena (dirty reads, phantom reads) - Quiz 5medium Transactions and Data Integrity - Savepoints within transactions - Quiz 5medium Triggers - INSERT trigger - Quiz 9hard Triggers - Trigger performance considerations - Quiz 7medium