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[General] PostgreSQL-Essentials Reliable Real Test & Study Guide PostgreSQL-Essentials

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【General】 PostgreSQL-Essentials Reliable Real Test & Study Guide PostgreSQL-Essentials

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EnterpriseDB PostgreSQL Essentials Certification v13 Sample Questions (Q28-Q33):NEW QUESTION # 28
Which command reclaims all obsolete row space and compacts the customers table for reuse?
  • A. VACUUM customers;
  • B. ANALYZE customers;
  • C. CLUSTER customers;
  • D. VACUUM FULL customers;
Answer: D

NEW QUESTION # 29
You need to restore only the schema from a custom format backup file. Which pg_restore option should you use?
  • A. --schema-only
  • B. --data-only
  • C. -s
  • D. Both B and C
Answer: D

NEW QUESTION # 30
Which command rebuilds an index that is performing slowly for better performance?
  • A. REBUILD INDEX indexname;
  • B. ANALYZE INDEX indexname;
  • C. VACUUM INDEX indexname;
  • D. REINDEX INDEX indexname;
Answer: D

NEW QUESTION # 31
Which command can be used to display all roles and their attributes in PostgreSQL using psql?
  • A. SHOW ROLES;
  • B. LIST ROLES;
  • C. dr
  • D. du
Answer: D

NEW QUESTION # 32
Which system view provides real-time information about currently active sessions and running queries?
  • A. pg_active_sessions
  • B. pg_stat_activity
  • C. pg_current_queries
  • D. pg_sessions
Answer: B

NEW QUESTION # 33
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