44 questions for “PDO & Databases”

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Information Technology

44 questions in 1 technology

#	Question	Technology	Topic	Level
1	How do you use named placeholders in a PDO prepared statement, and how do they improve readability compared to positional question mark placeholders? PHP › PDO & Databases	PHP	PDO & Databases	Intermediate
2	What is PDO in PHP, and what advantages does it provide over older database extensions like mysqli for interacting with a database? PHP › PDO & Databases	PHP	PDO & Databases	Beginner
3	What is a prepared statement in PDO, and why is using one considered essential for writing secure database queries? PHP › PDO & Databases	PHP	PDO & Databases	Beginner
4	How do database transactions work in PDO, and why are they important for ensuring multiple related database operations either all succeed together or all fail together? PHP › PDO & Databases	PHP	PDO & Databases	Intermediate
5	How do you configure PDO's error handling mode to ensure database errors are properly reported as catchable exceptions rather than silently failing? PHP › PDO & Databases	PHP	PDO & Databases	Intermediate
6	How does connection pooling and persistent connections work with PDO, and what tradeoffs should be considered before enabling persistent connections? PHP › PDO & Databases	PHP	PDO & Databases	Advanced
7	How should an application handle database connection failures gracefully, including implementing retry logic and connection health checks for a reliable production system? PHP › PDO & Databases	PHP	PDO & Databases	Advanced
8	What is SQL injection, and how does using prepared statements with PDO help prevent this common vulnerability in PHP applications? PHP › Security	PHP	Security	Beginner
9	What is PHP and what makes it particularly well suited for web development? PHP › Basics & Types	PHP	Basics & Types	Beginner
10	What is caching in a PHP application, and why is it important for improving performance? PHP › Caching Strategies in PHP	PHP	Caching Strategies in PHP	Beginner

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