Best PostgreSQL-Essentials Exam Dumps for the Preparation of Latest Exam Questions [Q30-Q54]

Best PostgreSQL-Essentials Exam Dumps for the Preparation of Latest Exam Questions

PostgreSQL-Essentials Actual Questions 100% Same Braindumps with Actual Exam!

EnterpriseDB PostgreSQL-Essentials Exam Syllabus Topics:

Topic	Details
Topic 1	Database Security: This section of the exam measures the skills of Security Analysts and focuses on access control, encryption, and user authentication techniques. It evaluates the candidate’s ability to protect sensitive data and maintain compliance with security standards.
Topic 2	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 3	Database Clusters: This section of the exam measures the skills of System Engineers and covers the principles of clustering for performance and fault tolerance. It evaluates candidates’ ability to manage clustered environments, ensure high availability, and maintain data consistency across nodes.
Topic 4	Disaster Recovery: This section of the exam measures the skills of IT Infrastructure Managers and emphasizes planning and executing disaster recovery procedures. It ensures candidates can design recovery plans to restore operations quickly and minimize data loss after catastrophic events.
Topic 5	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 6	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.

 

NEW QUESTION # 30
Which psql meta-command is used to describe a table including its structure, columns, and constraints?

• A. \d tablename
• B. \dt tablename
• C. \show tablename
• D. \describe tablename

Answer: A

NEW QUESTION # 31
What is the purpose of the checkpoint_timeout configuration parameter in PostgreSQL?

• A. To define connection timeout
• B. To control the maximum time between automatic WAL checkpoints
• C. To set backup timeout interval
• D. To set the time limit for query execution

Answer: B

NEW QUESTION # 32
You need to take a full online base backup of your cluster using pg_basebackup. Which option specifies the output directory?

• A. -D directory
• B. --output directory
• C. -d directory
• D. -o directory

Answer: A

NEW QUESTION # 33
You want to reload the PostgreSQL configuration without restarting the server. Which function should you execute?

• A. pg_restart_conf()
• B. pg_reload_conf()
• C. reload_configuration()
• D. pg_refresh_conf()

Answer: B

NEW QUESTION # 34
You are working as a Postgres DBA. Due to an increase in transactional load on your Postgres instance, the server is experiencing frequent checkpoints. You have decided to increase the WAL area size. You have also decided to upgrade your database instance to PostgreSQL 13. While initializing your database cluster in PostgreSQL 13, you have decided to increase the WAL segment size. Which of the following options can be used with the initdb command to set a custom WAL segment size?

• A. --wal-segsize
• B. -x
• C. --waldir
• D. No such option is available in PostgreSQL

Answer: A

NEW QUESTION # 35
You need to reclaim storage occupied by dead tuples in the customers table. Which command should you use?

• A. ANALYZE customers;
• B. REINDEX customers;
• C. CLUSTER customers;
• D. VACUUM customers;

Answer: D

NEW QUESTION # 36
Which command reclaims all obsolete row space and compacts the customers table for reuse?

• A. ANALYZE customers;
• B. VACUUM FULL customers;
• C. VACUUM customers;
• D. CLUSTER customers;

Answer: B

NEW QUESTION # 37
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;
• D. COPY emp TO '/path/emp.csv' WITH CSV HEADER;

Answer: D

NEW QUESTION # 38
What is the purpose of shared_buffers configuration parameter in PostgreSQL?

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

Answer: C

NEW QUESTION # 39
In PostgreSQL 13, which parameter must be set to enable WAL archiving for Point-in-Time Recovery?

• A. wal_archiving must be set to on
• B. archive_level must be set to full
• C. wal_level must be set to replica or higher
• D. backup_mode must be set to archive

Answer: C

NEW QUESTION # 40
You want to check the current value of the max_connections parameter. Which SQL command should you use?

• A. SHOW max_connections;
• B. DISPLAY max_connections;
• C. GET max_connections;
• D. SELECT max_connections;

Answer: A

NEW QUESTION # 41
Which command displays the current search path in PostgreSQL?

• A. SELECT search_path;
• B. \path
• C. GET search_path;
• D. SHOW search_path;

Answer: D

NEW QUESTION # 42
You want to execute SQL commands from a file using psql. Which command should you use?

• A. \i filename
• B. \run filename
• C. \e filename
• D. \f filename

Answer: A

NEW QUESTION # 43
You want to set the effective cache size for indexes to 512MB. Which parameter should you configure?

• A. index_cache = 512MB
• B. shared_cache = 512MB
• C. cache_size = 512MB
• D. effective_cache_size = 512MB

Answer: D

NEW QUESTION # 44
You are working as a Postgres DBA. You want to configure logging for slow running queries on your database cluster. Which setting needs to be modified to log all the queries which take more than 5 seconds?

• A. log_duration
• B. log_min_duration_statement
• C. log_statement
• D. log_destination

Answer: B

NEW QUESTION # 45
Autocommit occurs in which of the following situations?

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

Answer: D

NEW QUESTION # 46
You want to list all available databases in your PostgreSQL cluster using psql. Which command should you use?

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

Answer: B

NEW QUESTION # 47
Which pg_restore option allows you to drop database objects before recreating them?

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

Answer: D

NEW QUESTION # 48
Which parameter controls the amount of memory allocated for maintenance operations like VACUUM and CREATE INDEX?

• A. maintenance_work_mem
• B. work_mem
• C. autovacuum_work_mem
• D. shared_buffers

Answer: A

NEW QUESTION # 49
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. Identity
• B. Serial
• C. None
• D. Both

Answer: A

NEW QUESTION # 50
In PostgreSQL, archiving can be enabled for hot backups. During recovery, all the archive logs can be played on the restored backup and Point-in-Time Recovery can be performed. Which of the following parameters directly influences Mean Time to Recovery and is also used to control the size of the WAL area?

• A. wal_size
• B. checkpoint_timeout
• C. wal_level
• D. max_wal_size

Answer: D

NEW QUESTION # 51
You want to list all schemas in the current database using psql. Which command should you use?

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

Answer: D

NEW QUESTION # 52
You want to gracefully terminate a user's connection to the database. Which function should you use?

• A. pg_terminate_backend(pid)
• B. pg_kill_backend(pid)
• C. pg_disconnect_backend(pid)
• D. pg_cancel_backend(pid)

Answer: A

NEW QUESTION # 53
Which psql command toggles the display of tuples only (without column headers)?

• A. \x
• B. \h
• C. \a
• D. \t

Answer: D

NEW QUESTION # 54
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