Element8 Interview Questions and Answers

Types of troubleshooting as a DBA include performance tuning, backup and recovery issues, security concerns, and database connectivity problems.

• Performance tuning - optimizing queries, indexes, and server configurations

• Backup and recovery issues - resolving failed backups, restoring data from backups

• Security concerns - identifying and fixing vulnerabilities, managing user permissions

• Database connectivity problems - troubleshooting network issues, resolving connection errors

Different types of database backups include full, incremental, differential, and snapshot backups.

• Full backups: Backs up the entire database

• Incremental backups: Backs up only the data that has changed since the last backup

• Differential backups: Backs up all changes made since the last full backup

• Snapshot backups: Captures the state of the database at a specific point in time

• Backup strategies may include a combination of these types to ensure data integrity and minimize downtim...read more

SQL Server patching in a 2 node alwayson cluster involves applying patches to each node separately to minimize downtime.

• Patching should be done during a maintenance window to avoid impacting production.

• Apply patches to the secondary node first, failover to it, then patch the primary node.

• Ensure that all databases are synchronized and failover is successful before proceeding with patching.

• Test the failover process and application functionality after patching to ensure everythi...read more

Migrating database from On-Prem to Azure Cloud IaaS involves planning, preparation, migration, and validation steps.

• Assess current database environment and requirements

• Choose appropriate Azure IaaS server size and configuration

• Prepare data for migration, ensuring compatibility with Azure

• Migrate data using tools like Azure Database Migration Service

• Validate data integrity and performance post-migration

Adding a new Database in AlwaysOn involves creating a new database, adding it to the availability group, and synchronizing it with other replicas.

• Create a new database on the primary replica

• Add the new database to the availability group

• Ensure that the new database is synchronized with other replicas

• Verify the status of the new database on all replicas