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Huawei HCIP-GaussDB-OLTP V1.5 Sample Questions:

1. When creating a user in GaussDB (for MySQL), which info must be specified?

A) Password
B) Username
C) Max connections
D) Host

2. System tables and views record metadata for DB objects and users. Which system table or viewcannotbe used to query user information?

A) pg_authid
B) pg_user
C) pg_auth_members
D) pg_roles

3. Which statements about slow query logs are correct?

A) Record order may differ from execution order
B) Slow logs record SQL affecting performance for later tuning
C) Logs are written after execution and all locks are released
D) Time waiting for initial table locks is excluded

4. In GaussDB (for MySQL), what is the default value of the long_query_time parameter (i.e., the slow log threshold)?

A) 15s
B) 10s
C) 5s
D) 20s

5. In the EXPLAIN command output of GaussDB (for MySQL), which Select_type values are valid?

A) PRIMARY: outermost SELECT in query with subqueries
B) DEPENDENT UNION: subsequent SELECTs in a UNION
C) DERIVED: derived table SELECT (subquery in FROM)
D) UNION RESULT: result of UNION

Solutions: