Oracle

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ORACLE

ASSESSMENT

(YOU HAVE ONLY 30 MINUTES TO COMPLETE THIS PART [20 Questions])

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1. In Oracle, what is the purpose of the COMMIT statement?

To undo changes made by the current transaction

To permanently delete data from a table

To commit the current transaction

To create a savepoint

2. In Oracle, what is a foreign key used for?

To enforce uniqueness in a column

To establish relationships between tables

To provide a default value for a column

To sort the result set

3. Which statement is used to remove a table from the database in Oracle?

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

4. What is the purpose of the ORDER BY clause in Oracle?

To filter rows in a query

To sort the result set

To group rows based on a column

To join tables

5. Which statement is used to update data in a table in Oracle?

CHANGE

MODIFY

UPDATE

ALTER

6. What is the purpose of the HAVING clause in Oracle?

To filter rows in a query

To filter columns in a query

To filter groups in a query

To filter results based on a condition

7. Which statement is used to grant privileges to a user in Oracle?

ALLOW

GRANT

GIVE

PERMISSION

8. What is the purpose of the WHERE clause in a SQL query?

To specify the order of the result set

To filter the rows returned by a query

To join tables

To group rows based on a column

9. What is the purpose of the ROWID in Oracle?

To uniquely identify a row in a table

To store the row count in a table

To specify the order of the result set

To create a primary key

10. What does DML stand for in the context of Oracle?

Data Manipulation Language

Database Modification Language

Data Modeling Language

Database Management Language

11. Which Oracle command is used to commit the current transaction?

ROLLBACK

SAVEPOINT

COMMIT

BEGIN TRANSACTION

12. In Oracle, what is the purpose of the SELECT statement?

To update records

To retrieve data

To delete records

To insert records

13. Which SQL function is used to find the average value in a column in Oracle?

AVG

SUM

MIN

MAX

14. What is the purpose of the CASE statement in Oracle?

To define a loop in PL/SQL

To handle exceptions

To create a virtual column

To perform conditional logic in a query

15. What is the purpose of the TRUNCATE statement in Oracle?

To delete all rows from a table

To remove a table from the database

To empty a table without logging individual row deletions

To drop a column from a table

16. What is the purpose of the EXISTS operator in Oracle?

To check if a table exists in the database

To check if a column exists in a table

To check if a value exists in a column

To check if a subquery returns any rows

17. In Oracle, what does the term "DDL" stand for?

Data Definition Language

Data Description Language

Database Definition Language

Database Description Language

18. Which statement is used to add a new column to an existing table in Oracle?

ADD COLUMN

CREATE COLUMN

ALTER TABLE ADD COLUMN

INSERT COLUMN

19. What does SQL stand for?

Structured Language

Standard Query Language

System Query Language

Sequential Query Language

20. Which SQL function is used to find the highest value in a column in Oracle?

SUM

MIN

AVG

MAX

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