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 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

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

DESC

ORDER DESC

SORT DESC

DESCENDING

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

UPPER

LOWER

INITCAP

UCASE

4. 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

5. 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

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 data type is used to store variable-length character strings in Oracle?

CHAR

VARCHAR

CLOB

BLOB

8. 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

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

DELETE

REMOVE

DROP

TRUNCATE

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

SUM

MIN

AVG

MAX

12. What does SQL stand for?

Structured Language

Standard Query Language

System Query Language

Sequential Query Language

13. 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

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

ROLLBACK

SAVEPOINT

COMMIT

BEGIN TRANSACTION

15. Which keyword is used to create an alias for a table or a column in Oracle?

ALIAS

NAME

RENAME

16. 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

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

AVG

SUM

MIN

MAX

18. 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

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

ALLOW

GRANT

GIVE

PERMISSION

20. 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

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