MLAI Digital Postgresql DBA Interview Questions and Answers

ETL Developers are responsible for designing, developing, and maintaining ETL processes to extract, transform, and load data from various sources into a data warehouse.

• Designing ETL processes to extract data from multiple sources

• Transforming data to meet business requirements

• Loading data into a data warehouse or other target systems

• Developing and maintaining ETL jobs using tools like Informatica, Talend, or SSIS

SCD Type 1 in IICS involves overwriting existing data with new data without maintaining historical changes.

• In IICS, use the Mapping Designer to create a mapping that loads data from source to target.

• Use a Lookup transformation to check if the record already exists in the target table.

• If the record exists, update the existing record with new data using an Update Strategy transformation.

• If the record does not exist, inse...read more

A pull request is a method of submitting contributions to a project on GitHub for review and merging.

• Pull requests are commonly used in version control systems like Git to propose changes to a codebase.

• They allow developers to collaborate and discuss changes before merging them into the main branch.

• Pull requests typically include a description of the changes, related issues, and any necessary tests or documentation.

• Rev...read more

Stateful set is a Kubernetes controller that manages the deployment and scaling of a set of pods with persistent storage.

• Stateful set ensures that each pod in the set has a unique identity and stable network identity.

• Stateful set pods are created in order and are not replaced until they are deleted.

• Stateful set is commonly used for stateful applications like databases where each pod requires persistent storage.

• Example:...read more

DBA stands for Database Administrator. The architecture of DBA involves managing and maintaining databases to ensure data integrity and security.

• DBA is responsible for installing, configuring, and upgrading database software.

• They monitor database performance and troubleshoot issues.

• DBA designs and implements backup and recovery strategies to prevent data loss.

• They also manage user access and security permissions within...read more

Maintaining the database involves regular monitoring, performance tuning, applying patches, and ensuring backups are taken regularly.

• Regularly monitor database performance and usage

• Perform routine maintenance tasks such as applying patches and updates

• Take regular backups to ensure data integrity and disaster recovery

• Implement security measures to protect the database from unauthorized access

• Optimize database performanc

Start up parameters are used to configure the behavior of SQL Server when it starts up.

• Start up parameters are specified in the SQL Server Configuration Manager.

• Common start up parameters include -d (database files location), -e (error log location), -m (single user mode), -T (trace flags), etc.

• Start up parameters can be modified to customize the behavior of SQL Server during startup.

• Example: -dC:\Program Files\Microso...read more

I joined inm because of the company's reputation for innovation and growth in the tech industry.

• Attracted to company's reputation for innovation

• Excited about opportunities for growth in tech industry

• Impressed by company culture and values

I am an experienced ETL Developer with a strong background in data integration and transformation.

• Over 5 years of experience in ETL development

• Proficient in using tools like Informatica, Talend, and SSIS

• Strong SQL skills for data querying and manipulation

• Experience in designing and implementing data warehouses

• Familiar with data modeling and ETL best practices