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Oracle Database 23ai SQL Associate Sample Questions:

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

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

2. Which of the following data dictionary views provides information about constraints on tables?

A) All of the above
B) ALL_CONSTRAINTS
C) USER_CONSTRAINTS
D) DBA_CONSTRAINTS

3. What is a SELF JOIN in SQL?

A) A join used for Cartesian products
B) A join between tables with identical structures
C) A join of a table with itself
D) A join that does not require a WHERE clause

4. What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);

A) Creates a temporary table
B) Creates a table with only VARCHAR2 and DATE columns
C) Creates a table with no constraints
D) Creates a table with a primary key and a NOT NULL constraint

5. What is the purpose of a correlated subquery?

A) A subquery that combines data from multiple tables
B) A subquery that depends on the result of another subquery
C) A subquery that references columns from the outer query
D) A subquery that can be used only with aggregate functions

Solutions: