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Oracle Database 23ai SQL Associate Sample Questions:

1. What is the purpose of the DBA_OBJECTS data dictionary view?

A) To provide information about all objects in the database
B) To show the current session details
C) To monitor system performance
D) To list all users in the database

2. What does the INTERSECT operator do in SQL?

A) Returns rows that are present in both queries
B) Returns rows from the first query that are not present in the second query
C) Combines all rows from two queries without any conditions
D) Combines rows from two queries and includes all duplicates

3. Which of the following is true about foreign key constraints in SQL?

A) They ensure that a column only contains NULL values.
B) They define a relationship between two tables.
C) They enforce the uniqueness of values in a column.

4. Which command creates a new role in Oracle Database?

A) CREATE NEW ROLE role_name;
B) CREATE ROLE role_name;
C) ADD ROLE role_name;

5. Which command is used to add a new column to an existing table?

A) ALTER TABLE
B) MODIFY COLUMN
C) ADD COLUMN
D) ALTER COLUMN

Solutions: