3 BigQuery interview QA (2025 Edition) | 2025-09-16 01:30 PM

📘 Neulax - BigQuery Interview Prep
This video contains 3 BigQuery interview questions with answers.

📝 Questions & Answers:

Q1: What is clustering in BigQuery?
A1: Clustering organizes data within partitions by specified columns to speed selective queries and reduce scanned data. Example: Like shelving books within a year by topic so queries for a topic find fewer boxes.

Q2: What is INFORMATION_SCHEMA and metadata tables?
A2: INFORMATION_SCHEMA and system views expose metadata about datasets, tables, jobs, and query history for auditing and management. Example: Like a library index and logbook you consult to find where things are and who checked them out.

Q3: What is time travel and table snapshots in BigQuery?
A3: BigQuery supports table snapshots and limited time-travel to access historical table states for recovery or auditing. Example: Like checking out how a shelf looked at a previous date to restore or audit changes.

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