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. What does SQL stand for? Structured Language Standard Query Language System Query Language Sequential Query Language2. Which statement is used to add a new column to an existing table in Oracle? ADD COLUMN CREATE COLUMN ALTER TABLE ADD COLUMN INSERT COLUMN3. 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 column4. 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 tables5. Which SQL function is used to find the highest value in a column in Oracle? SUM MIN AVG MAX6. Which function is used to convert a character string to uppercase in Oracle? UPPER LOWER INITCAP UCASE7. Which statement is used to delete data from a table in Oracle? DELETE REMOVE DROP TRUNCATE8. Which keyword is used to create an alias for a table or a column in Oracle? AS ALIAS NAME RENAME9. Which statement is used to update data in a table in Oracle? CHANGE MODIFY UPDATE ALTER10. 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 point11. 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 condition12. Which Oracle command is used to commit the current transaction? ROLLBACK SAVEPOINT COMMIT BEGIN TRANSACTION13. 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 query14. Which function is used to find the minimum value in a column in Oracle? MIN AVG MAX SUM15. Which statement is used to remove a table from the database in Oracle? REMOVE TABLE DELETE TABLE DROP TABLE ERASE TABLE16. In Oracle, what is the purpose of the SELECT statement? To update records To retrieve data To delete records To insert records17. What does DML stand for in the context of Oracle? Data Manipulation Language Database Modification Language Data Modeling Language Database Management Language18. Which function is used to find the total number of rows in a table in Oracle? COUNT SUM AVG MAX19. Which clause is used to sort the result set in descending order in Oracle? DESC ORDER DESC SORT DESC DESCENDING20. 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 set5 out of 4Time is Up!
