Oracle 1Z0-171 Exam : Oracle Database 23ai SQL Associate

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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;

A) 100
B) 200
C) NULL
D) 300

2. What is the default order of evaluation when multiple SET operators are used in a query?

A) UNION, INTERSECT, MINUS
B) INTERSECT, UNION, MINUS
C) INTERSECT, MINUS, UNION
D) UNION, MINUS, INTERSECT

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

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

4. What does the following SQL statement do?
SELECT e.employee_id, d.department_name
FROM employees e
JOIN departments d ON e.department_id = d.department_id;

A) Retrieves all employees and their departments
B) Retrieves only departments with no employees
C) Retrieves employees and departments with matching department_id
D) Retrieves only employees without departments

5. What will the following query do?
DELETE FROM employees
WHERE department_id = 20;

A) Raise an error because DELETE cannot use a WHERE clause
B) Delete the department_id column in the employees table
C) Delete all rows where department_id is 20
D) Delete all rows in the employees table

Solutions: