Oracle

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ORACLE

ASSESSMENT

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

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1. What does SQL stand for?

Structured Language

Standard Query Language

System Query Language

Sequential Query Language

2. 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

3. 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

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

AVG

SUM

MIN

MAX

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

UNION

JOIN

CONCAT

MERGE

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

DESC

ORDER DESC

SORT DESC

DESCENDING

7. 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

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

ALIAS

NAME

RENAME

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

To update records

To retrieve data

To delete records

To insert records

10. 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

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

DELETE

REMOVE

DROP

TRUNCATE

12. 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

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

CHANGE

MODIFY

UPDATE

ALTER

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

UPPER

LOWER

INITCAP

UCASE

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

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

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 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

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 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

20. 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

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