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EnterpriseDB PostgreSQL Essentials Certification v13 PostgreSQL-Essentials Dumps in PDF

Free EnterpriseDB PostgreSQL-Essentials Real Questions (page: 9)

PostgreSQL-Essentials PDF — 71 Questions

Which psql meta-command displays the structure of a specific table including columns, types, and constraints?

  1. \d tablename
  2. \dt tablename
  3. DESCRIBE tablename;
  4. SHOW TABLE tablename;

Answer(s): A



In PostgreSQL, what is the default size of a WAL segment file?

  1. 8 MB
  2. 16 MB
  3. 32 MB
  4. 64 MB

Answer(s): B



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

  1. \du
  2. \dr
  3. LIST ROLES;
  4. SHOW ROLES;

Answer(s): A



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

  1. To set the time limit for query execution
  2. To control the maximum time between automatic WAL checkpoints
  3. To define connection timeout
  4. To set backup timeout interval

Answer(s): B



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

  1. -d
  2. --data-only
  3. -D
  4. --no-schema

Answer(s): B



In PostgreSQL, which system catalog stores information about databases?

  1. pg_database
  2. pg_class
  3. pg_tables
  4. information_schema.databases

Answer(s): A



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

  1. SELECT max_connections;
  2. SHOW max_connections;
  3. GET max_connections;
  4. DISPLAY max_connections;

Answer(s): B



Which of the following commands in psql will execute SQL commands from a file?

  1. \i filename
  2. \e filename
  3. \f filename
  4. \x filename

Answer(s): A



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