Oracle

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ORACLE

ASSESSMENT

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

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1. Which function is used to find the total number of rows in a table in Oracle?

COUNT

SUM

AVG

MAX

2. 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

3. What is the default sorting order in an ORDER BY clause in Oracle?

Descending

Ascending

Random

Alphabetical

4. Which function is used to convert a character string to uppercase in Oracle?

UPPER

LOWER

INITCAP

UCASE

5. What is the purpose of the ROLLBACK statement in Oracle?

To undo changes made by the current transaction

To permanently delete data from a table

To commit the current transaction

To create a save point

6. In Oracle, what is the purpose of the SAVEPOINT statement?

To undo changes made by the current transaction

To create a checkpoint within a transaction

To commit the current transaction

To create a subquery

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

CHANGE

MODIFY

UPDATE

ALTER

8. What is the purpose of the GROUP 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

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

ALLOW

GRANT

GIVE

PERMISSION

10. In Oracle, which operator is used to combine the result sets of two or more SELECT statements?

UNION

JOIN

CONCAT

MERGE

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

Data Definition Language

Data Description Language

Database Definition Language

Database Description Language

12. In Oracle, what does the acronym PL/SQL stand for?

Procedural Language/Structured Query Language

Programming Language/Standard Query Language

Procedure Language/Structured Question Language

Procedural Logic/Structured Query Language

13. 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

14. 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

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

To update records

To retrieve data

To delete records

To insert records

16. In Oracle, what is a primary 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

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

SUM

MIN

AVG

MAX

18. What does SQL stand for?

Structured Language

Standard Query Language

System Query Language

Sequential Query Language

19. 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

20. What is the purpose of the CONSTRAINT keyword in Oracle?

To specify a default value for a column

To enforce referential integrity

To create a virtual column

To filter rows in a query

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