Database Engineer

Description

We are looking for a Database Engineer to design and build scalable database solutions. You will architect database schemas, implement data models, optimize database performance, and ensure data integrity. The ideal candidate has experience with database design principles, SQL optimization, replication and sharding, and database migration. You will work with application teams, create database documentation, implement database automation, and support data-driven applications. Strong analytical and problem-solving skills are key.

Interview Questions (38)

Q1How would you optimize a slow database query?
Technical
Q2What are indexes in databases and how do they improve performance?
Technical
Q3Explain the differences between relational and document databases.
Technical
Q4Explain the concept of database normalization and its normal forms.
Technical
Q5What database technologies have you worked with?
Experience
Q6Explain the ACID properties in database transactions.
Technical
Q7Explain the concept of database sharding.
Technical
Q8Explain the concept of eventual consistency vs strong consistency.
Technical
Q9Explain the concept of database replication.
Technical
Q10Describe your experience with data modeling and database design.
Experience
Q11What is your experience with NoSQL databases?
Experience
Q12How would you implement pagination for a large dataset?
Technical
Q13Explain the concept of database transactions and isolation levels.
Technical
Q14How does a B-tree index work in databases?
Technical
Q15Explain the concept of database deadlocks and how to prevent them.
Technical
Q16Explain the concept of lazy loading and eager loading.
Technical
Q17What are the differences between DELETE, TRUNCATE, and DROP in SQL?
Technical
Q18Explain the concept of database connection pooling vs connection multiplexing.
Technical
Q19Explain the concept of database views and materialized views.
Technical
Q20Explain the concept of database partitioning vs sharding.
Technical
Q21Explain the concept of database denormalization and when to use it.
Technical
Q22What are the different types of NoSQL databases and their use cases?
Technical
Q23Explain the concept of eventual consistency vs strong consistency.
Technical
Q24How does database indexing affect write performance?
Technical
Q25Explain the concept of database triggers and stored procedures.
Technical
Q26How does database query optimization work?
Technical
Q27What are the different isolation levels in database transactions?
Technical
Q28How would you implement a distributed transaction?
Technical
Q29Explain the concept of schema migration strategies.
Technical
Q30Explain the concept of read replicas and their use cases.
Technical
Q31How does connection pooling work in database systems?
Technical
Q32What are the different strategies for handling database schema changes?
Technical
Q33Tell me about your experience with relational database optimization.
Experience
Q34What are the differences between SQL and NoSQL databases?
Technical
Q35How do you decide between SQL and NoSQL for a new feature?
Technical
Q36A query in production is slow. Walk me through what you do.
Situational
Q37Tell me about a database migration you ran that could not take downtime.
Experience
Q38A junior engineer wants to add a foreign key constraint to a 200-million-row table in production. What do you tell them?
Situational