Java Springs Online Model Test1

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1.What is the meaning of the return data type void?
An empty memory space is returned so that the developers can utilize it	void returns no data type
void is not supported in Java	None of the above

2.A lower precision can be assigned to a higher precision value in JavA. For example a byte type data can be assigned to int type.
True	False
Both of the above	none

3.Which of the following statements about the Java language is true?
Both procedural and OOP are supported in JavA	Java supports only procedural approach towards programming
Java supports only OOP approach	None of the above

4.Which of the following statements is false about objects?
An instance of a class is an object	Objects can access both static and instance data
Object is the super class of all other classes	Objects do not permit encapsulation

5.Which methods can access to private attributes of a class?
Only Static methods of the same class	Only instances of the same class
Only methods those defined in the same class	Only classes available in the same package

6.What is an aggregate object?
An object with only primitive attributes	An instance of a class which has only static methods
An instance which has other objects	None of the above

7.Assume that File is an abstract class and has toFile() methoD. ImageFile and BinaryFile are concrete classes of the abstract class File.
Binary File	Image File
Both File and Binary Files	None of the above

8.A class can have many methods with the same name as long as the number of parameters or type of parameters is different. This OOP concept is known as
Method Invocating	Method Overriding
Method Labeling	Method Overloading

9.Which of the following is considered as a blue print that defines the variables and methods common to all of its objects of a specific kind?
Object	Class
Method	Real data types

10.What are the two parts of a value of type double?
Significant Digits, Exponent	Length, Denominator
Mode, Numerator	none

11.After the following code fragment, what is the value in fname? String str; int fname; str = "Foolish boy."; fname = str.indexOf("fool");
0	2
-1	4

12.What is the value of ‘number’ after the following code fragment execution? int number = 0; int number2 = 12 while (number < number2) { number = number + 1; }
5	12
21	13

13.Given the following code snippet; int salaries[; int index = 0; salaries = new int salaries[4; while (index < 4) { salaries[index = 10000; index++; } What is the value of salaries [3]
40000	50000
15000	10000

14.Which of the following is not a return type?
boolean	void
public	Button

15.If result = 2 + 3 * 5, what is the value and type of ‘result’ variable?
17, byte	25, byte
17, int	25, int

16.What is the data type for the number 9.6352?
float	double
Float	Double

17.Assume that the value 3929.92 is of type ‘float’. How to assign this value after declaring the variable ‘interest’ of type float?
interest = 3929.92	interest = (Float)3929.92
interest = 3929.92 (float)	interest = 3929.92f

18.Which of the following statements is true?
The default char data type is a space( ‘ ‘ ) character	The default integer data type is ‘int’ and real data type is ‘float’
The default integer data type is ‘long’ and real data type is ‘float’	The default integer data type is ‘int’ and real data type is ‘double’

19.How many numeric data types are supported in Java?
8	4
2	6

20. Which of the following statements declare class Sample to belong to the payroll.admindept package?
package payroll;package admindept;	import payroll.*;
package payroll.admindept.Sample;	package payroll.admindept;