Oracle 1Z0-171 : Oracle Database 23ai SQL Associate

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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

Question 1

Which of the following ensures that a relational database enforces data integrity?

A. Indexes on all columns
B. Constraints such as primary keys, foreign keys, and unique constraints
C. Hierarchical data organization
D. Redundant data storage

Question 2

What does the EXISTS operator check in a subquery?

A. If the subquery references the outer query
B. If the subquery returns a specific number of rows
C. If the subquery contains only unique values
D. If the subquery returns any rows

Question 3

What does the NEXTVAL pseudocolumn do in SQL?

A. Retrieves the next value in a sequence and increments the sequence
B. Resets the sequence to its starting value
C. Deletes the sequence from the database
D. Retrieves the current value of a sequence without incrementing it

Question 4

Which type of join includes rows that do not have matching values in the joined table?

A. SELF JOIN
B. INNER JOIN
C. CROSS JOIN
D. OUTER JOIN

Question 5

What is the primary purpose of an index in SQL?

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

Solutions: