Oracle Nihileswaran No Comment 10Feb Share 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 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 column2. 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 key3. Which SQL operator is used for pattern matching in Oracle? LIKE IN BETWEEN EXISTS4. 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 rows5. 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 tables6. 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 table7. What is the default sorting order in an ORDER BY clause in Oracle? Descending Ascending Random Alphabetical8. Which function is used to find the minimum value in a column in Oracle? MIN AVG MAX SUM9. In Oracle, which operator is used to combine the result sets of two or more SELECT statements? UNION JOIN CONCAT MERGE10. Which keyword is used to create an alias for a table or a column in Oracle? AS ALIAS NAME RENAME11. Which statement is used to add a new column to an existing table in Oracle? ADD COLUMN CREATE COLUMN ALTER TABLE ADD COLUMN INSERT COLUMN12. 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 condition13. Which statement is used to grant privileges to a user in Oracle? ALLOW GRANT GIVE PERMISSION14. Which SQL function is used to find the highest value in a column in Oracle? SUM MIN AVG MAX15. Which SQL function is used to find the average value in a column in Oracle? AVG SUM MIN MAX16. 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 query17. In Oracle, what does the term "DDL" stand for? Data Definition Language Data Description Language Database Definition Language Database Description Language18. 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 condition19. Which Oracle command is used to commit the current transaction? ROLLBACK SAVEPOINT COMMIT BEGIN TRANSACTION20. Which function is used to find the total number of rows in a table in Oracle? COUNT SUM AVG MAX5 out of 4Time is Up! Previous Postgre SQL February 10, 2024 Next Bootstrap February 10, 2024 You Might Also Like Hello world CHOOLS No Comment How to Disable Avast Antivirus CHOOLS No Comment AVG Review — Is the Absolutely free Version As effective as the Premium Version? CHOOLS No Comment Understanding the Limitations of Models of Managing CHOOLS No Comment Careers Similar To Teaching CHOOLS No Comment