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 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

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

UPPER

LOWER

INITCAP

UCASE

3. 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

4. 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

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

Data Definition Language

Data Description Language

Database Definition Language

Database Description Language

6. 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

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

DESC

ORDER DESC

SORT DESC

DESCENDING

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

UNION

JOIN

CONCAT

MERGE

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

CHANGE

MODIFY

UPDATE

ALTER

10. 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

11. What is the purpose of the UNION ALL operator in Oracle?

To combine the result sets of two or more SELECT statements

To join tables based on a condition

To filter rows in a query

To exclude duplicate rows from the result set

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

Descending

Ascending

Random

Alphabetical

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

To update records

To retrieve data

To delete records

To insert records

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

COUNT

SUM

AVG

MAX

15. 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

16. 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

17. Which statement is used to delete data from a table in Oracle?

DELETE

REMOVE

DROP

TRUNCATE

18. 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

19. 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

20. 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

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