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 statement is used to delete data from a table in Oracle? DELETE REMOVE DROP TRUNCATE2. Which function is used to find the total number of rows in a table in Oracle? COUNT SUM AVG MAX3. 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 set4. 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 key5. Which Oracle command is used to commit the current transaction? ROLLBACK SAVEPOINT COMMIT BEGIN TRANSACTION6. What is the default sorting order in an ORDER BY clause in Oracle? Descending Ascending Random Alphabetical7. Which statement is used to add a new column to an existing table in Oracle? ADD COLUMN CREATE COLUMN ALTER TABLE ADD COLUMN INSERT COLUMN8. 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 query9. 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 rows10. Which clause is used to sort the result set in descending order in Oracle? DESC ORDER DESC SORT DESC DESCENDING11. 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 set12. Which data type is used to store variable-length character strings in Oracle? CHAR VARCHAR CLOB BLOB13. Which SQL function is used to find the average value in a column in Oracle? AVG SUM MIN MAX14. 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 condition15. What is the purpose of the TRUNCATE statement in Oracle? To delete all rows from a table To remove a table from the database To empty a table without logging individual row deletions To drop a column from a table16. Which SQL operator is used for pattern matching in Oracle? LIKE IN BETWEEN EXISTS17. Which function is used to find the minimum value in a column in Oracle? MIN AVG MAX SUM18. Which statement is used to remove a table from the database in Oracle? REMOVE TABLE DELETE TABLE DROP TABLE ERASE TABLE19. 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 string20. 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 tables5 out of 4Time is Up!
