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Database Administrator (DBA) Interview Questions

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Need to practice your Database Administrator (DBA) skills for an upcoming job interview? Try solving these Database Administrator (DBA) interview questions that test knowledge of capacity planning, installation, configuration, database design, migration, performance monitoring, security, troubleshooting, as well as backup and data recovery. We’ll provide feedback on your answers, and you can use a hint if you get stuck.

These Database Administrator interview questions are examples of real tasks used by employers to screen job candidates such as database administrators, SQL developers, and others that need to manage and administer database management systems to store and organize data.

1. Database Backups

Easy  
Database Administration Backup New Public

Under a new database backup plan:

  • Full backups of the database are taken every 6 hours starting at 00:00.
  • Differential backups are taken every 1 hour starting at 01:00, except for intervals of 6 hours (when full backups are taken).
  • Transaction/redo log backups are taken every 30 minutes starting at 00:00. The transactional/redo log is reset/cleared after a backup is taken.

Due to a missed scenario during the testing phase, a development error in setting wrong query conditions resulted in the loss of all records from a table at 13:45, which had data prior to the implementation of the backup plan. All further backups were taken as per the mentioned schedule.

Select all the ways to restore the database until 13:45.

(Select all acceptable answers.)

Solve Question

2. Cloud Data

Hard  
Database Administration Database Tuning Performance tuning New Public

A new cloud service provider plans to launch its services in the near future. The database cluster for keeping user data will consist of database nodes with each node placed in a different region.

Users can choose the regional node their data will reside on. User data is kept in a table along with the region id. The region id and the region name are kept in another table which is redundant on every region node.

Select all answers that are true for the given scenario.

(Select all acceptable answers.)

Solve Question

If you feel ready, take one of our timed public Database Administrator (DBA) Interview Questions tests:
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Database Administration and SQL Online Test (Easy / Hard)

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