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 default sorting order in an ORDER BY clause in Oracle?

Descending

Ascending

Random

Alphabetical

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

UPPER

LOWER

INITCAP

UCASE

3. 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

4. Which SQL operator is used for pattern matching in Oracle?

BETWEEN

EXISTS

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

CHANGE

MODIFY

UPDATE

ALTER

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

UNION

JOIN

CONCAT

MERGE

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

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

9. 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

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

DESC

ORDER DESC

SORT DESC

DESCENDING

11. 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

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

ROLLBACK

SAVEPOINT

COMMIT

BEGIN TRANSACTION

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

DELETE

REMOVE

DROP

TRUNCATE

14. 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

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

To update records

To retrieve data

To delete records

To insert records

16. 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

17. 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

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

MIN

AVG

MAX

SUM

19. 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

20. 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

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