Oracle

Welcome to CHOOLS

ORACLE

ASSESSMENT

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

**** Wishing You All The Best ****

Instructions :

To start the quiz, please provide your name, email id and phone number.
All questions are mandatory^*
Answering each question is required before going on to the next page of questions.
Your response is subject to change at any time.
After completed the quiz click the submit button. If, once the time is up, it will be automatically submitted.
The report will be mailed to your email address after the quiz is finished.

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

ROLLBACK

SAVEPOINT

COMMIT

BEGIN TRANSACTION

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

UNION

JOIN

CONCAT

MERGE

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

MIN

AVG

MAX

SUM

4. What does SQL stand for?

Structured Language

Standard Query Language

System Query Language

Sequential Query Language

5. 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

6. 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

7. 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

8. 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

9. 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

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

DELETE

REMOVE

DROP

TRUNCATE

11. 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

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

Descending

Ascending

Random

Alphabetical

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

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

14. 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

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

SUM

MIN

AVG

MAX

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

UPPER

LOWER

INITCAP

UCASE

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

DESC

ORDER DESC

SORT DESC

DESCENDING

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

Data Definition Language

Data Description Language

Database Definition Language

Database Description Language

19. 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

20. 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 out of 4

Hello!

We are happy to see you again!

Login to your account

Register to start learning

Oracle

Oracle

Postgre SQL

Bootstrap

You Might Also Like

Hello world

How to Disable Avast Antivirus

AVG Review — Is the Absolutely free Version As effective as the Premium Version?

Understanding the Limitations of Models of Managing

Careers Similar To Teaching