Topic

Databases

Real interview questions with expert answers, plain-English explanations, and practical examples. (11 questions)

Accenture Backend Developer Databases

How would a backend developer design a flexible and scalable database schema for a multi-tenant SaaS application, considering data isolation and efficient querying?

Read answer →
Salesforce Backend Developer Databases

When would a backend developer choose different database isolation levels for a Salesforce application, and what are the trade-offs?

Read answer →
Atlassian Backend Developer Databases

How would a backend developer design a database connection pooling strategy for a high-traffic microservice?

Read answer →
Mphasis Database Administrator Databases

Beyond B-trees: explain specialized indexing strategies like hash, bitmap, or spatial indexes, and when would a DBA choose each?

Read answer →
ServiceNow Database Administrator Databases

When would you choose a NoSQL database over a relational database, and what are the key considerations for each?

Read answer →
VMware Data Engineer Databases

How do database sharding and partitioning differ, and when would you implement each for scalability?

Read answer →
Honeywell Database Administrator Databases

How do database replication strategies (e.g., master-slave, multi-master) differ, and what are their trade-offs for high availability and disaster recovery?

Read answer →
Google Backend Developer Databases

Explain database transactions, ACID properties, and how they ensure data integrity in a concurrent application.

Read answer →
Oracle Database Administrator Databases

How does a B-tree index actually speed up a query, and when does it stop helping?

Read answer →
Google Data Engineer Databases

What’s the difference between OLTP and OLAP, and how does that affect schema design?

Read answer →