[2025] PostgreSQL-Essentials All-in-One Exam Guide Practice To your PostgreSQL-Essentials Exam!

Preparations of PostgreSQL-Essentials Exam 2025 EnterpriseDB PostgreSQL Unlimited 90 Questions

EnterpriseDB PostgreSQL-Essentials Exam Syllabus Topics:

Topic	Details
Topic 1	Database Objects and Hierarchy: This section of the exam measures the skills of Database Developers and includes understanding tables, views, indexes, and their relationships within a database structure. It assesses the ability to manage and organize objects in a logical hierarchy for efficient data access.
Topic 2	Fundamental SQL: This section of the exam measures the skills of Database Developers and covers foundational SQL concepts, including queries, joins, and data manipulation. It ensures that candidates can efficiently retrieve, update, and manage data within relational databases.
Topic 3	Creating and Managing Databases: This section of the exam measures the skills of Database Developers and focuses on creating, configuring, and maintaining databases. It assesses understanding of database lifecycle management, including setup, schema creation, and performance adjustments.
Topic 4	Backup And Recovery Strategies: This section of the exam measures the skills of Database Administrators and focuses on developing an understanding of essential backup and recovery methods. It evaluates the ability to design, implement, and manage strategies that ensure data protection and system continuity in case of unexpected failures or data loss scenarios.
Topic 5	Configuration Parameters: This section of the exam measures the skills of Database Administrators and includes knowledge of key configuration parameters that impact performance, storage, and reliability. Candidates are tested on setting and tuning configurations to optimize database stability and responsiveness.

 

NEW QUESTION # 27
Which pg_restore option allows you to drop database objects before recreating them?

• A. -d
• B. -c or --clean
• C. --drop-all
• D. -r

Answer: B

NEW QUESTION # 28
In PostgreSQL, which system catalog stores information about databases?

• A. pg_database
• B. information_schema.databases
• C. pg_class
• D. pg_tables

Answer: A

NEW QUESTION # 29
What is the purpose of shared_buffers configuration parameter in PostgreSQL?

• A. To control WAL buffer size
• B. To set the amount of memory for sorting
• C. To determine memory for caching data from disk
• D. To set connection pool size

Answer: C

NEW QUESTION # 30
SERIAL and IDENTITY columns can be used to add an auto-incrementing column in a Postgres table. Which of these two column types are SQL standard compliant?

• A. Serial
• B. Identity
• C. None
• D. Both

Answer: B

NEW QUESTION # 31
You are connected to a database in PostgreSQL using the psql tool. Which of the following commands can be used to view the cluster data directory?

• A. SHOW DIRECTORY;
• B. SHOW DATA_DIRECTORY;
• C. SELECT data_dir FROM pg_settings;
• D. SELECT server_dir FROM pg_settings;

Answer: B

NEW QUESTION # 32
SERIAL and IDENTITY columns can be used to add an auto-incrementing column in a Postgres table. Which of these two column types are SQL standard compliant?

• A. Serial
• B. Identity
• C. None

Answer: B

NEW QUESTION # 33
Autocommit occurs in which of the following situations?

• A. All DDL statements
• B. All DML statements
• C. None of the above
• D. On DML and DDL statements

Answer: A

NEW QUESTION # 34
Which psql meta-command lists all schemas in the current database?

• A. \ls
• B. \schemas
• C. \ds
• D. \dn

Answer: D

NEW QUESTION # 35
You want to export the emp table to a CSV file with column headers using the COPY command. Which command should you use?

• A. COPY emp TO '/path/emp.csv' DELIMITER ',' HEADER;
• B. EXPORT emp TO '/path/emp.csv' CSV HEADER;
• C. COPY emp TO '/path/emp.csv' WITH CSV HEADER;
• D. COPY emp TO '/path/emp.csv' WITH CSV;

Answer: C

NEW QUESTION # 36
Which pg_dump option creates a backup that can be restored using pg_restore?

• A. -Fp (plain text format)
• B. -Fc (custom format)
• C. Both B and C
• D. -Ft (tar format)

Answer: C

NEW QUESTION # 37
Which parameter controls the amount of memory allocated for maintenance operations like VACUUM and CREATE INDEX?

• A. temp_buffers
• B. work_mem
• C. vacuum_mem
• D. maintenance_work_mem

Answer: D

NEW QUESTION # 38
You want to update statistics for the emp and dept tables to help the query planner. Which command should you use?

• A. UPDATE STATISTICS emp, dept;
• B. ANALYZE emp; ANALYZE dept;
• C. REINDEX emp, dept;
• D. VACUUM emp, dept;

Answer: B

NEW QUESTION # 39
In PostgreSQL, which view provides information about currently running queries?

• A. pg_current_queries
• B. pg_active_sessions
• C. pg_running_queries
• D. pg_stat_activity

Answer: D

NEW QUESTION # 40
Which parameter must be set to enable WAL archiving for Point-in-Time Recovery in PostgreSQL 13?

• A. wal_level = replica
• B. wal_level = logical
• C. wal_level = archive
• D. wal_level = minimal

Answer: A

NEW QUESTION # 41
Which psql meta-command is used to list all databases in the cluster?

• A. \databases
• B. Both A and B
• C. \list
• D. \l

Answer: B

NEW QUESTION # 42
You need to determine the names and definitions of all views in the edbuser schema. Which query should you use?

• A. SELECT * FROM pg_views WHERE schemaname='edbuser';
• B. Both B and C
• C. SELECT * FROM pg_views;
• D. SELECT * FROM information_schema.views WHERE table_schema='edbuser';

Answer: B

NEW QUESTION # 43
You want to list all available databases in your PostgreSQL cluster using psql. Which command should you use?

• A. \l
• B. \list
• C. SELECT databases();
• D. SHOW DATABASES;

Answer: A

NEW QUESTION # 44
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