PostgreSQL Objective Questions & Answers for Practitioners Set-1
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1. What is the purpose of the JOIN clause in a PostgreSQL SELECT statement?


2. What does the term "MVCC" stand for in the context of PostgreSQL?


3. Which PostgreSQL data type is used to store large binary objects, such as images or documents?


4. In PostgreSQL, what is the purpose of the pg_hba.conf file?


5. Which statement is used to add a new column to an existing PostgreSQL table?


6. What is the purpose of the pg_stat_statements extension in PostgreSQL?


7. Which indexing method in PostgreSQL is suitable for text-based searches with wildcard patterns?


8. What is the purpose of the VACUUM command in PostgreSQL?


9. Which PostgreSQL authentication method uses an external authentication server?


10. What is the purpose of the pg_dump utility in PostgreSQL?


11. Which PostgreSQL extension is used for handling JSON data?


12. What is the primary advantage of using a prepared statement in PostgreSQL?


13. What is the purpose of the EXPLAIN command in PostgreSQL?


14. Which PostgreSQL system catalog contains information about all tables, views, and indexes in the database?


15. What is the purpose of the pg_ctl utility in PostgreSQL?


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