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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What does the following query return?
SELECT ROUND(123.456, 1) AS rounded_value FROM dual;

A) 124
B) 123.4
C) 123.45
D) 123.5

2. Which operator can be used in a multiple-row subquery to match a single value to a list of values?

A) NOT NULL
B) EXISTS
C) =
D) IN

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

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

4. What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;

A) Only the first names of employees
B) Concatenated first and last names with spaces in between
C) A syntax error
D) Concatenated first and last names without spaces

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

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

Solutions: