Grokking Database Fundamentals for Tech Interviews
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Question 1
What is the primary purpose of indexing in a database?
A
To compress data for storage optimization
B
To improve the speed of data retrieval
C
To maintain data consistency during transactions
D
To distribute data across multiple nodes
Question 2
What is the main advantage of a clustered index?
A
Reduces data redundancy
B
Requires no additional storage
C
Supports faster random access
D
Improves performance for range queries
Question 3
How does a bloom filter handle false positives?
A
By storing exact data for validation
B
By using additional hash functions for resolution
C
By probabilistically returning false positives
D
By maintaining multiple replicas of the data
Question 4
Which of the following is true about hash-based indexing?
A
It provides constant-time complexity for equality searches
B
It guarantees that no collisions occur
C
It organizes data sequentially for range queries
D
It is unsuitable for primary indexes
Question 5
What is a secondary index used for?
A
Enforcing primary key constraints
B
Allowing queries on non-primary key attributes
C
Storing metadata about tables
D
Organizing records in sorted order

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Table of Contents

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