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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

Question 1

Which SET operator returns rows from the first query that are not present in the second query?

A. INTERSECT
B. MINUS
C. UNION
D. UNION ALL

Question 2

What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);

A. All employee IDs
B. Employee IDs from department 10
C. Employee IDs from departments with no employees
D. Employees with salaries greater than 10

Question 3

Which of the following is a valid reason to create a synonym?

A. To provide simplified and consistent access to an object
B. To automatically generate numeric values for a column
C. To improve query performance
D. To enforce unique constraints on a table

Question 4

What happens if a DELETE statement is executed without a WHERE clause?

A. Only the first row is deleted.
B. All rows in the table are deleted.
C. An error is raised.
D. No rows are deleted.

Question 5

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

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

Solutions: