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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What is a SELF JOIN in SQL?

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

2. What is the purpose of using external tables in Oracle Database?

A) To manage data stored in external files using SQL
B) To store backup copies of database tables
C) To create temporary tables for session-specific data
D) To improve the performance of complex queries

3. What happens when the TRUNCATE TABLE statement is executed?

A) Deletes only the last row in the table
B) Deletes the table structure permanently
C) Deletes all rows in the table and logs the operation for rollback
D) Deletes all rows in the table without logging the operation for rollback

4. Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?

A) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY 100;
B) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY 10;
C) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY -10;
D) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY -100;

5. What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;

A) Employees and their managers' IDs
B) Employees who do not have managers
C) All employees and their IDs
D) Employees who have managers

Solutions: