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Free PostgreSQL-Essentials Exam Braindumps
PostgreSQL Essentials Certification v13 Questions 11–15 (page: 4)

Updated On: 10-Feb-2026

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QUESTION: 11

Which command can be used to display all roles and their attributes in PostgreSQL using psql?

\du
\dr
LIST ROLES;
SHOW ROLES;

Answer(s): A

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QUESTION: 12

What is the purpose of the checkpoint_timeout configuration parameter in PostgreSQL?

To set the time limit for query execution
To control the maximum time between automatic WAL checkpoints
To define connection timeout
To set backup timeout interval

Answer(s): B

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QUESTION: 13

Which pg_dump option allows you to dump only the data without schema definitions?

-d
--data-only
-D
--no-schema

Answer(s): B

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QUESTION: 14

In PostgreSQL, which system catalog stores information about databases?

pg_database
pg_class
pg_tables
information_schema.databases

Answer(s): A

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QUESTION: 15

You want to check the current value of the max_connections parameter.
Which SQL command should you use?

SELECT max_connections;
SHOW max_connections;
GET max_connections;
DISPLAY max_connections;

Answer(s): B

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