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Oracle Database 23ai SQL Associate Sample Questions:

1. What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;

A) 15.67
B) 15.6
C) 15.68
D) 15.678

2. Which data dictionary view lists all indexes created by the current user?

A) USER_INDEXES
B) INDEX_LIST
C) DBA_INDEXES
D) ALL_INDEXES

3. What is required for the queries combined by a SET operator to work correctly?

A) Both queries must include the WHERE clause.
B) Both queries must use the GROUP BY clause.
C) The tables must be joined using a primary key.
D) The result sets must have the same number of columns and compatible data types.

4. Which of the following statements is true about constraints in Oracle Database?

A) Constraints can be added or modified using the ALTER TABLE statement.
B) Constraints cannot reference other tables.
C) Constraints can only be added when creating a table.
D) Constraints are automatically dropped when rows are deleted.

5. Which of the following ensures that a relational database enforces data integrity?

A) Redundant data storage
B) Hierarchical data organization
C) Indexes on all columns
D) Constraints such as primary keys, foreign keys, and unique constraints

Solutions: