Oracle

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ORACLE

ASSESSMENT

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

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1. 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

2. 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

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

To update records

To retrieve data

To delete records

To insert records

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

Data Definition Language

Data Description Language

Database Definition Language

Database Description Language

5. Which function is used to find the minimum value in a column in Oracle?

MIN

AVG

MAX

SUM

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 add a new column to an existing table in Oracle?

ADD COLUMN

CREATE COLUMN

ALTER TABLE ADD COLUMN

INSERT COLUMN

8. 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

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

ALLOW

GRANT

GIVE

PERMISSION

10. 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

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

UNION

JOIN

CONCAT

MERGE

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

Data Manipulation Language

Database Modification Language

Data Modeling Language

Database Management Language

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

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

14. What is the purpose of the INDEX in Oracle?

To define a unique constraint

To enforce referential integrity

To improve query performance

To create a virtual column

15. 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

16. Which clause is used to sort the result set in descending order in Oracle?

DESC

ORDER DESC

SORT DESC

DESCENDING

17. What is the purpose of the OUTER JOIN in Oracle?

To exclude rows that do not meet the condition

To include only rows that meet the condition

To include all rows from both tables, even if there is no match

To filter rows based on a condition

18. What is the purpose of the NVL function in Oracle?

To convert a value to uppercase

To replace NULL with a specified value

To concatenate two strings

To find the length of a string

19. What does SQL stand for?

Structured Language

Standard Query Language

System Query Language

Sequential Query Language

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

Descending

Ascending

Random

Alphabetical

5 out of 4

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