McqMate
Chapters
| 1. |
Which SQL function is used to count the number of rows in a SQL query? |
| A. | COUNT() |
| B. | NUMBER() |
| C. | SUM() |
| D. | COUNT(*) |
| Answer» D. COUNT(*) | |
| 2. |
Which SQL keyword is used to retrieve a maximum value? |
| A. | MOST |
| B. | TOP |
| C. | MAX |
| D. | UPPER |
| Answer» C. MAX | |
| 3. |
Which of the following SQL clauses is used to DELETE tuples from a database table? |
| A. | DELETE |
| B. | REMOVE |
| C. | DROP |
| D. | CLEAR |
| Answer» A. DELETE | |
| 4. |
___________removes all rows from a table without logging the individual row deletions. |
| A. | DELETE |
| B. | REMOVE |
| C. | DROP |
| D. | TRUNCATE |
| Answer» D. TRUNCATE | |
| 5. |
Which of the following is not a DDL command? |
| A. | UPDATE |
| B. | TRUNCATE |
| C. | ALTER |
| D. | None of the Mentioned |
| Answer» A. UPDATE | |
| 6. |
Which of the following are TCL commands? |
| A. | UPDATE and TRUNCATE |
| B. | SELECT and INSERT |
| C. | GRANT and REVOKE |
| D. | ROLLBACK and SAVEPOINT |
| Answer» D. ROLLBACK and SAVEPOINT | |
| 7. |
________________ is not a category of SQL command. |
| A. | TCL |
| B. | SCL |
| C. | DCL |
| D. | DDL |
| Answer» B. SCL | |
| 8. |
If you don’t specify ASC or DESC after a SQL ORDER BY clause, the following is used by default ______________ |
| A. | ASC |
| B. | DESC |
| C. | There is no default value |
| D. | None of the mentioned |
| Answer» A. ASC | |
| 9. |
Which of the following statement is true? |
| A. | DELETE does not free the space containing the table and TRUNCATE free the space containing the table |
| B. | Both DELETE and TRUNCATE free the space containing the table |
| C. | Both DELETE and TRUNCATE does not free the space containing the table |
| D. | DELETE free the space containing the table and TRUNCATE does not free the space containing the table |
| Answer» A. DELETE does not free the space containing the table and TRUNCATE free the space containing the table | |
| 10. |
What is the purpose of the SQL AS clause? |
| A. | The AS SQL clause is used to change the name of a column in the result set or to assign a name to a derived column |
| B. | The AS clause is used with the JOIN clause only |
| C. | The AS clause defines a search condition |
| D. | All of the mentioned |
| Answer» A. The AS SQL clause is used to change the name of a column in the result set or to assign a name to a derived column | |
| 11. |
What does DML stand for? |
| A. | Different Mode Level |
| B. | Data Model Language |
| C. | Data Mode Lane |
| D. | Data Manipulation language |
| Answer» D. Data Manipulation language | |
| 12. |
With SQL, how do you select all the records from a table named “Persons” where the value of the column “FirstName” ends with an “a”? |
| A. | SELECT * FROM Persons WHERE FirstName=’a’ |
| B. | SELECT * FROM Persons WHERE FirstName LIKE ‘a%’ |
| C. | SELECT * FROM Persons WHERE FirstName LIKE ‘%a’ |
| D. | SELECT * FROM Persons WHERE FirstName=’%a%’ |
| Answer» C. SELECT * FROM Persons WHERE FirstName LIKE ‘%a’ | |
| 13. |
With SQL, how can you return all the records from a table named “Persons” sorted descending by “FirstName”? |
| A. | SELECT * FROM Persons SORT BY ‘FirstName’ DESC |
| B. | SELECT * FROM Persons ORDER FirstName DESC |
| C. | SELECT * FROM Persons SORT ‘FirstName’ DESC |
| D. | SELECT * FROM Persons ORDER BY FirstName DESC |
| Answer» D. SELECT * FROM Persons ORDER BY FirstName DESC | |
| 14. |
With SQL, how can you return the number of not null records in the “Persons” table? |
| A. | SELECT COUNT() FROM Persons |
| B. | SELECT COLUMNS() FROM Persons |
| C. | SELECT COLUMNS(*) FROM Persons |
| D. | SELECT COUNT(*) FROM Persons |
| Answer» A. SELECT COUNT() FROM Persons | |
| 15. |
What does the ALTER TABLE clause do? |
| A. | The SQL ALTER TABLE clause modifies a table definition by altering, adding, or deleting table columns and/or constraints |
| B. | The SQL ALTER TABLE clause is used to insert data into database table |
| C. | THE SQL ALTER TABLE deletes data from database table |
| D. | The SQL ALTER TABLE clause is used to delete a database table |
| Answer» A. The SQL ALTER TABLE clause modifies a table definition by altering, adding, or deleting table columns and/or constraints | |
| 16. |
The UPDATE SQL clause can _____________ |
| A. | update only one row at a time |
| B. | update more than one row at a time |
| C. | delete more than one row at a time |
| D. | delete only one row at a time |
| Answer» B. update more than one row at a time | |
| 17. |
The UNION SQL clause can be used with _____________ |
| A. | SELECT clause only |
| B. | DELETE and UPDATE clauses |
| C. | UPDATE clause only |
| D. | All of the mentioned |
| Answer» A. SELECT clause only | |
| 18. |
Which SQL statement is used to return only different values? |
| A. | SELECT DIFFERENT |
| B. | SELECT UNIQUE |
| C. | SELECT DISTINCT |
| D. | SELECT ALL |
| Answer» C. SELECT DISTINCT | |
| 19. |
Which SQL keyword is used to sort the result-set? |
| A. | ORDER BY |
| B. | SORT |
| C. | ORDER |
| D. | SORT BY |
| Answer» A. ORDER BY | |
| 20. |
How can you change “Hansen” into “Nilsen” in the “LastName” column in the Persons table? |
| A. | UPDATE Persons SET LastName=’Hansen’ INTO LastName=’Nilsen’ |
| B. | MODIFY Persons SET LastName=’Nilsen’ WHERE LastName=’Hansen’ |
| C. | MODIFY Persons SET LastName=’Hansen’ INTO LastName=’Nilsen’ |
| D. | UPDATE Persons SET LastName=’Nilsen’ WHERE LastName=’Hansen’ |
| Answer» D. UPDATE Persons SET LastName=’Nilsen’ WHERE LastName=’Hansen’ | |
| 21. |
Which of the following command makes the updates performed by the transaction permanent in the database? |
| A. | ROLLBACK |
| B. | COMMIT |
| C. | TRUNCATE |
| D. | DELETE |
| Answer» B. COMMIT | |
| 22. |
Which TCL command undo all the updates performed by the SQL in the transaction? |
| A. | ROLLBACK |
| B. | COMMIT |
| C. | TRUNCATE |
| D. | DELETE |
| Answer» A. ROLLBACK | |
| 23. |
SQL query to find all the cities whose humidity is 95. |
| A. | SELECT city WHERE humidity = 95 |
| B. | SELECT city FROM weather WHERE humidity = 95 |
| C. | SELECT humidity = 89 FROM weather |
| D. | SELECT city FROM weather |
| Answer» B. SELECT city FROM weather WHERE humidity = 95 | |
| 24. |
SQL query to find the temperature in increasing order of all cities. |
| A. | SELECT city FROM weather ORDER BY temperature |
| B. | SELECT city, temperature FROM weather |
| C. | SELECT city, temperature FROM weather ORDER BY temperature |
| D. | SELECT city, temperature FROM weather ORDER BY city |
| Answer» D. SELECT city, temperature FROM weather ORDER BY city | |
| 25. |
What is the meaning of LIKE ‘%0%0%’? |
| A. | Feature begins with two 0’s |
| B. | Feature ends with two 0’s |
| C. | Feature has more than two 0’s |
| D. | Feature has two 0’s in it, at any position |
| Answer» D. Feature has two 0’s in it, at any position | |
| 26. |
Find the names of these cities with temperature and condition whose condition is neither sunny nor cloudy. |
| A. | SELECT city, temperature, condition FROM weather WHERE condition NOT IN (‘sunny’, ‘cloudy’) |
| B. | SELECT city, temperature, condition FROM weather WHERE condition NOT BETWEEN (‘sunny’, ‘cloudy’) |
| C. | SELECT city, temperature, condition FROM weather WHERE condition IN (‘sunny’, ‘cloudy’) |
| D. | SELECT city, temperature, condition FROM weather WHERE condition BETWEEN (‘sunny’, ‘cloudy’); |
| Answer» A. SELECT city, temperature, condition FROM weather WHERE condition NOT IN (‘sunny’, ‘cloudy’) | |
| 27. |
Find the name of those cities with temperature and condition whose condition is either sunny or cloudy but temperature must be greater than 70. |
| A. | SELECT city, temperature, condition FROM weather WHERE condition = ‘sunny’ AND condition = ‘cloudy’ OR temperature > 70 |
| B. | SELECT city, temperature, condition FROM weather WHERE condition = ‘sunny’ OR condition = ‘cloudy’ OR temperature > 70 |
| C. | SELECT city, temperature, condition FROM weather WHERE condition = ‘sunny’ OR condition = ‘cloudy’ AND temperature > 70 |
| D. | SELECT city, temperature, condition FROM weather WHERE condition = ‘sunny’ AND condition = ‘cloudy’ AND temperature > 70 |
| Answer» C. SELECT city, temperature, condition FROM weather WHERE condition = ‘sunny’ OR condition = ‘cloudy’ AND temperature > 70 | |
| 28. |
Find all the tuples having a temperature greater than ‘Paris’. |
| A. | SELECT * FROM weather WHERE temperature > (SELECT temperature FROM weather WHERE city = ‘Paris’ |
| B. | SELECT * FROM weather WHERE temperature > (SELECT * FROM weather WHERE city = ‘Paris’) |
| C. | SELECT * FROM weather WHERE temperature > (SELECT city FROM weather WHERE city = ‘Paris’) |
| D. | SELECT * FROM weather WHERE temperature > ‘Paris’ temperature |
| Answer» A. SELECT * FROM weather WHERE temperature > (SELECT temperature FROM weather WHERE city = ‘Paris’ | |
| 29. |
Find all the cities with temperature, condition and humidity whose humidity is in the range of 63 to 79. |
| A. | SELECT * FROM weather WHERE humidity IN (63 to 79) |
| B. | SELECT * FROM weather WHERE humidity NOT IN (63 AND 79) |
| C. | SELECT * FROM weather WHERE humidity BETWEEN 63 AND 79 |
| D. | SELECT * FROM weather WHERE humidity NOT BETWEEN 63 AND 79 |
| Answer» C. SELECT * FROM weather WHERE humidity BETWEEN 63 AND 79 | |
| 30. |
The command to remove rows from a table ‘CUSTOMER’ is __________________ |
| A. | DROP FROM CUSTOMER |
| B. | UPDATE FROM CUSTOMER |
| C. | REMOVE FROM CUSTOMER |
| D. | DELETE FROM CUSTOMER WHERE |
| Answer» D. DELETE FROM CUSTOMER WHERE | |
| 31. |
What type of join is needed when you wish to include rows that do not have matching values? |
| A. | Equi-join |
| B. | Natural join |
| C. | Outer join |
| D. | All of the Mentioned |
| Answer» C. Outer join | |
| 32. |
What type of join is needed when you wish to return rows that do have matching values? |
| A. | Equi-join |
| B. | Natural join |
| C. | Outer join |
| D. | All of the Mentioned |
| Answer» D. All of the Mentioned | |
| 33. |
Which of the following is one of the basic approaches for joining tables? |
| A. | Subqueries |
| B. | Union Join |
| C. | Natural join |
| D. | All of the Mentioned |
| Answer» D. All of the Mentioned | |
| 34. |
The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T WHERE CUSTOMER_T. CUSTOMER_ID = ORDER_T. CUSTOMER_ID? |
| A. | Equi-join |
| B. | Natural join |
| C. | Outer join |
| D. | Cartesian join |
| Answer» A. Equi-join | |
| 35. |
A UNION query is which of the following? |
| A. | Combines the output from no more than two queries and must include the same number of columns |
| B. | Combines the output from no more than two queries and does not include the same number of columns |
| C. | Combines the output from multiple queries and must include the same number of columns |
| D. | Combines the output from multiple queries and does not include the same number of columns |
| Answer» C. Combines the output from multiple queries and must include the same number of columns | |
| 36. |
Which of the following statements is true concerning subqueries? |
| A. | Involves the use of an inner and outer query |
| B. | Cannot return the same result as a query that is not a subquery |
| C. | Does not start with the word SELECT |
| D. | All of the mentioned |
| Answer» A. Involves the use of an inner and outer query | |
| 37. |
Which of the following is a correlated subquery? |
| A. | Uses the result of an inner query to determine the processing of an outer query |
| B. | Uses the result of an outer query to determine the processing of an inner query |
| C. | Uses the result of an inner query to determine the processing of an inner query |
| D. | Uses the result of an outer query to determine the processing of an outer query |
| Answer» A. Uses the result of an inner query to determine the processing of an outer query | |
| 38. |
The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T? |
| A. | Equi-join |
| B. | Natural join |
| C. | Outer join |
| D. | Cartesian join |
| Answer» D. Cartesian join | |
| 39. |
Which is not a type of join in T-SQL? |
| A. | Equi-join |
| B. | Natural join |
| C. | Outer join |
| D. | Cartesian join |
| Answer» B. Natural join | |
| 40. |
What is a view? |
| A. | A view is a special stored procedure executed when certain event occurs |
| B. | A view is a virtual table which results of executing a pre-compiled query |
| C. | A view is a database diagram |
| D. | None of the Mentioned |
| Answer» B. A view is a virtual table which results of executing a pre-compiled query | |
| 41. |
Which of the following is not a limitation of view? |
| A. | ORDER BY Does Not Work |
| B. | Index Created on View Used Often |
| C. | Cross Database Queries Not Allowed in Indexed View |
| D. | Adding Column is Expensive by Joining Table Outside View |
| Answer» B. Index Created on View Used Often | |
| 42. |
Which of the following statement is true? |
| A. | Views could be looked as an additional layer on the table which enables us to protect intricate or sensitive data based upon our needs |
| B. | Views are virtual tables that are compiled at run time |
| C. | Creating views can improve query response time |
| D. | All of the Mentioned |
| Answer» D. All of the Mentioned | |
| 43. |
SQL Server has mainly how many types of views? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» B. two | |
| 44. |
Dynamic Management View is a type of ___________ |
| A. | System Defined Views |
| B. | User Defined View |
| C. | Simple View |
| D. | Complex View |
| Answer» A. System Defined Views | |
| 45. |
Syntax for creating views is __________ |
| A. | CREATE VIEW AS SELECT |
| B. | CREATE VIEW AS UPDATE |
| C. | DROP VIEW AS SELECT |
| D. | CREATE VIEW AS UPDATE |
| Answer» A. CREATE VIEW AS SELECT | |
| 46. |
You can delete a view with ___________ command. |
| A. | DROP VIEW |
| B. | DELETE VIEW |
| C. | REMOVE VIEW |
| D. | TRUNCATE VIEW |
| Answer» A. DROP VIEW | |
| 47. |
What is SCHEMABINDING a VIEW? |
| A. | Schema binding binds your views to the dependent physical columns of the accessed tables specified in the contents of the view |
| B. | These are stored only in the Master database |
| C. | These types of view are defined by users on a specified schema |
| D. | These are used to show database self describing information |
| Answer» B. These are stored only in the Master database | |
| 48. |
Which of the following is not a SQL Server INFORMATION_SCHEMA view? |
| A. | INFORMATION_SCHEMA.CONSTRAINT_TABLE_USAGE |
| B. | INFORMATION_SCHEMA.DOMAIN_CONSTRAINTS |
| C. | INFORMATION_SCHEMA.KEY_COLUMN_USAGE |
| D. | sys.dm_exec_connections |
| Answer» D. sys.dm_exec_connections | |
| 49. |
___________ is stored only in the Master database. |
| A. | Database-scoped Dynamic Management View |
| B. | Complex View |
| C. | Catalog View |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
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