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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. Which statement can be used to undo changes made in a transaction?

A) ROLLBACK
B) MERGE
C) COMMIT
D) SAVEPOINT

2. 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 10 INCREMENT BY -100;
D) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY 10;

3. Which SQL function can be used to replace NULL values with a specified value?

A) ISNULL
B) REPLACE
C) COALESCE
D) NVL

4. Which command is used to add a new column to an existing table?

A) ALTER COLUMN
B) ALTER TABLE
C) ADD COLUMN
D) MODIFY COLUMN

5. What does the NEXTVAL pseudocolumn do in SQL?

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

Solutions: