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EnterpriseDB PostgreSQL Essentials Certification v13 Sample Questions:

1. Which PostgreSQL backup utility can create backups in custom compressed format?

A) pg_dump with -Fc option
B) pg_basebackup
C) pg_restore
D) psql

2. Examine the following SQL:
CREATE VIEW vw_emp_details AS SELECT ename, sal, sal*12 AS annsal FROM emp; After creating the above view, what will be the result of the following query?
UPDATE vw_emp_details SET annsal = annsal + 100;

A) Statement executes successfully and all the rows of emp table are modified
B) Error: Cannot update column annsal
C) Statement executes successfully but none of the rows of emp table are modified
D) Error: Views cannot be updated

3. Which query displays the name and size of all databases in your cluster using a meaningful unit?

A) SELECT name, size FROM pg_database;
B) SHOW DATABASE SIZE;
C) SELECT datname, pg_size_pretty(pg_database_size(datname)) AS size FROM pg_database;
D) SELECT datname, pg_database_size(datname) FROM pg_database;

4. Which command rebuilds an index that is performing slowly for better performance?

A) ANALYZE INDEX indexname;
B) VACUUM INDEX indexname;
C) REBUILD INDEX indexname;
D) REINDEX INDEX indexname;

5. Which psql meta-command is used to list all databases in the cluster?

A) Both A and B
B) \databases
C) \l
D) \list

Solutions: