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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What is the primary purpose of an index in SQL?

A) To improve the performance of data retrieval queries
B) To ensure uniqueness of values in a column
C) To enforce data integrity constraints
D) To store metadata about a table

2. Which function is used to convert a string to uppercase in SQL?

A) CONVERT_UPPER
B) TO_UPPERCASE
C) CASE_UPPER
D) UPPER

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

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

4. What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;

A) An error due to incorrect syntax
B) The full date in the session time zone
C) The current year in the database time zone

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

Solutions: