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[Hardware] Latest PostgreSQL-Essentials Test Format, PostgreSQL-Essentials Exam Collection

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【Hardware】 Latest PostgreSQL-Essentials Test Format, PostgreSQL-Essentials Exam Collection

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EnterpriseDB PostgreSQL Essentials Certification v13 Sample Questions (Q87-Q92):NEW QUESTION # 87
Which configuration parameter limits the total number of connections available for your database cluster?
  • A. superuser_reserved_connection
  • B. max_connections
  • C. tcp_keepalives_count
  • D. log_connection
Answer: B

NEW QUESTION # 88
In PostgreSQL 13, which parameter must be set to enable WAL archiving for Point-in-Time Recovery?
  • A. archive_level must be set to full
  • B. wal_archiving must be set to on
  • C. backup_mode must be set to archive
  • D. wal_level must be set to replica or higher
Answer: D

NEW QUESTION # 89
In PostgreSQL, which system catalog stores information about databases?
  • A. pg_class
  • B. pg_tables
  • C. pg_database
  • D. information_schema.databases
Answer: C

NEW QUESTION # 90
Which query displays the name and size of all databases in your cluster using a meaningful unit?
  • A. SHOW DATABASE SIZE;
  • B. SELECT name, size FROM pg_database;
  • 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;
Answer: C

NEW QUESTION # 91
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. --waldir
  • B. -x
  • C. --wal-segsize
  • D. No such option is available in PostgreSQL
Answer: C

NEW QUESTION # 92
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