411 Locals Interview Questions and Answers for Experienced

Control statements in database are used to control the flow of execution of SQL statements.

• Control statements in database include IF, CASE, WHILE, LOOP, and GOTO.

• They are used to control the flow of execution of SQL statements.

• They help in making decisions, looping through data, and jumping to specific parts of code.

• For example, the IF statement can be used to check a condition and execute a block of code if the c...read more

Optimizing SQL and database involves improving query performance and database design.

• Use indexes to speed up query execution

• Normalize database tables to reduce redundancy

• Avoid using SELECT * and instead specify required columns

• Use stored procedures to reduce network traffic

• Regularly analyze and optimize database performance

MyISAM is faster but lacks transaction support, while InnoDB is slower but has transaction support.

• MyISAM is the default engine for MySQL.

• MyISAM is faster for read-heavy applications.

• InnoDB is slower but provides transaction support.

• InnoDB is better for write-heavy applications.

• InnoDB supports foreign keys and row-level locking.

• MyISAM does not support foreign keys or row-level locking.

Transactional statements cannot be implemented using MyISAM engine.

• MyISAM engine does not support transactions.

• It does not provide ACID compliance.

• In case of a crash, data can be lost.

• InnoDB engine should be used for transactional statements.

Prioritization depends on project requirements and team dynamics, but Agile/Scrum is preferred.

• Understand project goals and requirements

• Collaborate with team to identify priorities

• Use Agile/Scrum methodology for iterative development

• Consider impact on stakeholders and deadlines

• Regularly reassess priorities and adjust as needed