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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

Question 1

What is a sequence in Oracle Database?

A. A list of numbers stored in a table
B. A type of index used for sorting rows
C. A database object that generates a series of unique numeric values
D. A predefined set of SQL queries executed in order

Question 2

Which type of subquery returns exactly one value?

A. Multiple-row subquery
B. Scalar subquery
C. Correlated subquery
D. Inline view

Question 3

What happens when a unique index is created on a table column?

A. The column cannot contain duplicate values.
B. The column can only contain NULL values.
C. The column values are automatically encrypted.
D. The column data type is converted to a primary key.

Question 4

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

Question 5

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

Solutions: