1. PL/SQL LANGUAGE MULITPLE CHOICE QUESTION SET-1

2. Non- procedural language
1. SQL is:
Procedural language
Non- procedural language
Not a data sublanguage
None

3. 2. To form a projection with SQL:
Name of relation to be projected and the list of column to be shown
The keywords SELECT and FROM are optional.
The table to be used is listed before the keyword FROM
The column to be obtained are listed before the keyword FROM
None of these

4. 3. To remove duplicate rows this qualifier must be specified:
ONLY
UNIQUE
DISTINCT
SINGLE

5. 4. Which SQL keyword is used to name a new table and describe the table column?
Set
Create
Alter
Modify

6. 5. Which SQL keyword is used to change the structure, properties, and constraints of the column?
Set
Create
Alter
Modify

7. 6. If a table PRODUCT has a column PRICE with datatype Numebric (8,2), it store value as :
8 digits, decimal point and 2 more digits
6 digits decimals point and 2 more digits
10 digits with no stored decimal points
8 digits with no stored decimal points

8. 7. If a table product has a column price that has the data type numeric (8,2), the value will be displayed by the DBMS as:
123.45
12345

9. 8. Which SQL keyword is used to delete a table structure?
Drop
Update
Alter

10. 9. When the correct SQL command is used to delete a table’s structure what happens to the data of the table?
If deleted table is parent table the data is referred to child table
If deleted table is child table the data is added to parent table
The data in table is also deleted
Nothing because there is no data in the table

11. 10. In an SQL query which keyword is to be used to specify the table’s to be used?
EXISTS
From
Update
Set

12. 11. The asterisk means that?
All column
All records
All records with partial criteria meta re obtained
None

13. 12. Which SQL keyword is used to state the condition to specify the row to be selected?
EXISTS
Where
From
Select

14. 13. In an SQL query, which SQL keyword is used to join two conditions that both must be true for the rows to be selected?
EXISTS
AND IN OR

15. 14. In a SQL query which SQL keyword is used to determine if a column value is equal to any one of set of values?
EXIST
AND IN OR

16. 15. In an SQL query which built in function is used to compute the no of rows in a table ?
AVG
MAX
MIN
COUNT

17. 16. In an SQL query which built in function is used to total numeric columns?
AVG
SUM
MIN
COUNT

18. 17. In SQL which built in function is used to compare the average value of numeric column?
AVG
MEAN
MEAN
COUNT

19. 18. In an SQL which built in function is used to obtained largest value numeric columns?
AVG
MAX
MIN
COUNT

20. 19. In SQL which built in function used to obtain the smallest value of numeric columns?
AVG
MIN
LOWEST
COUNT

21. 20. In an SQL query which SQL keyword is used with built-in functions to group rows that have the same value in a specified column together?
Group by
Order by
Select
Sort by

22. 21. Which SQL keyword is used with group by to selects group meeting specified criteria?
AND
EXIST
HAVING IN

23. 22. Given a table with structure: emp (empno, name, salary, hiredate), which of the following is not a valid ANSI SQL command:
SELECT * FROM EMPLYEE WHERE NAME LIKE JA%
SELECT COUNT (*) FROM EMPLOYEE WHERE SALARY >30000
SELECT COUNT (EMPNO) FROM EMP
SELECT HIREDATE,COUNT (*) FROM EMP WHERE SALARY >30000

24. 23. In an SQL query which SQL keyword is used to implement a sub query?
Group by
Having
Order by
Select

25. 24. When one SQL query is embedded in where clause of another SQL query, it is called?
Subset
Joins
Where query
sub query

26. 25. In an SQL query which SQL keyword is used to specified the name of table to be joined
From
Having
Join
Select

27. 26. In SQL which SQL keyword is used to specify the condition (s) for a join operation?
From
Having
Where
Select

28. 27. Regarding the interchangeability sub quires and joins:
Join can always be used as an alternating to a subquery, and a subquery can always be used as an alternative to a join
A join can sometime be used as an alternative to a subquery and a subquery be sometime as an alternative to a join
A join can always be used as an alternative to a subquery, and a subquery can sometimes be used as an alternative to a join.
A join can sometimes be used as an alternative to a subquries and subquery can always be used as an alternative to a join.

29. 28. Which SQL keyword is used to add one or more rows in a table?
MODIFY
INSERT
SELECT
NONE

30. 29. Which SQL keyword is used to change one or more rows in a table?
MODIFY
INSERT
SELECT
UPDATE

31. 30. Which SQL statement is used to change a column value?
INSERT
SELECT
SET

32. 31. Which keyword is used to remove one or more rows in a table?
CHANGE
DELETE
SET
ERASE

33. 32. WHERE clause cannot be referred to ranges and partial values when ?
The keyword LIKE is used
Keyword BETWEEN is used
Keyword NULL is used
Keyword ALSO is used

34. 33. Which of the following are the five built-in functions provided by SQL?
COUNT, SUM, AVG,MIN, MAX
SUM, AVG, MIN, MAX, MULT
SU, AVG, MIN, MAX, DIV
SUM, AVG, MIN, MAX, NAME

35. 34. The SQL keyword GROPU BY instructs the DBMS:
To group the rows together
To group together those rows that have same value of the column
Both A and B
Neither A and B

36. 35. A sub query must be In bold In capital latter In parentheses
In italics

37. 36. Which is true about a join:
A join is a combination of WHERE and SELECT clause
A join is the combination of product operation, followed by a selection, followed by a projection
A join is a product of SELECT FROM WHERE clause.
A join can be used for two tables

38. 37. Which is true of a join?
A join can be used for a alternative way of expressing many subquries
A join expression can be substituted for all subquries expression
A join expression can be substituted for EXISTS and NON-EXISTS
Subquries can be substituted for all joins

39. 38. An outer join: Is not supported by ANSI standard SQL.
Is supported by many DBMS products
Both A and B
Neither A nor B

40. 39. EXISTS and NON-EXISTS:
Are logical operators
Only works with one or two tables
Can return values
None of above

41. 40. When using INSERT:
Rows can be modified according to criteria
Rows cannot be copied in mass from one table to another
Rows can be copied in mass from one table to another
Rows can be inserted into a table

42. 41. When using DELETE: Rows can be delete one at a time or groups
It will not cause integrity problem
Rows can be deleted one at a time
Order of operation is not required

43. 42. Which is not true about modifying data?
Rows can be modified one at a time or in groups
The keyword set is used to change a column value
After SET, the name of the column to be changed or then the new value or way of computing new value is specified
Mass update are fast, easy and cause less problems

44. SELECT with GROUP BY and HAVING
43. Which of the following is not an SQL statement used on a single table?
SELECT with WHERE
SELECT with GROUP BY
SELECT with GROUP BY and HAVING
SELECTION

45. SELECT with GROUP by and HAVING
44. Which of the following is not an operation used on two or more tables?
Subquries
Joins
EXISTS
SELECT with GROUP by and HAVING

46. 45. SQL command can be classified into three types which is not an SQL command type?
DDL
DML
DGL
DCL

47. 46. Three SQL, DDL, CREATE commands are
Schema, base and table
Base, table and schema
Key, base and table
Schema, table and view

48. 47. Which is not an advantage of view?
Simplify query commands
Provide data security
Enhance programming productivity
Decrease system overhead

49. 48. Which keyword is not included in most data retrieval statement?
Select As
From
Where

50. 49. Which of the following is true about data types in PL/SQL?
Large Object or LOB data types are pointers to large objects
The composite data types have data items that have internal components
References are pointers to other data items.
All of the above.

51. What value will be assigned to the variable declared as below − Counter binary integer;1
NULL
None of above