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

Descending

Ascending

Random

Alphabetical

3. 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

4. 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

5. 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

6. 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

7. 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

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

ALIAS

NAME

RENAME

9. 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

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

SUM

MIN

AVG

MAX

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

ROLLBACK

SAVEPOINT

COMMIT

BEGIN TRANSACTION

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

Data Definition Language

Data Description Language

Database Definition Language

Database Description Language

13. 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

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

AVG

SUM

MIN

MAX

15. 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

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

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

17. 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

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

DELETE

REMOVE

DROP

TRUNCATE

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

UNION

JOIN

CONCAT

MERGE

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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