Question: 1
Select one:
A. The program has a runtime error because the array
elements are not initialized.
B. The program has a compile error because the size of the
array wasn’t specified when declaring the array.
C. The program has a runtime error because the array element
x[0] is not defined.
D. The program runs fine and displays x[0] is 0.
Correct Answer:
Question: 2
Given:
public class Foo {
staticint[] a;
static { a[0]=2; }
public static void main( String[] args ) {}
}
Which exception or error will be thrown when a
programmer attempts to run this code?
Select one:
A. Compilation fails
B. java.lang.StackOverflowError
C. java.lang.IllegalStateException
D. java.lang.ExceptionInInitializerError
E. java.lang.ArrayIndexOutOfBoundsException
Correct Answer:
Question: 3
For a given interface, which of the following can we legally
declare within an interface definition?
Select one:
A. public double methoda();
B. protected void methoda(double d1);
C. static void methoda(double d1);
D. public final double methoda();
Correct Answer:
Question: 4
Among given methods, which is executed first before
execution of any other in a java program?
Select one:
A. args public method
B. static before main method
C. main in private method
D. main in public methods
Correct Answer:
Question: 5
What is the default value of a static integer variable of a
class in java?
Select one:
A. 1
B. null
C. 0
D. Garbage value
Correct Answer: 0
Question: 6
Which of the following are the legal declarations of array?
Select one:
A. int () myScores (2);
B. int [] totalPrice ();
C. int [] myScores [];
D. int () myScores [2];
Correct Answer:
Question: 7
What is the output of the following code?
int y = 100, x = 5;
while(y > 0)
{
y--;
if(y%x != 0)
{
continue;
}
System.out.println(y);
}
Select one:
A. Prints from 95 skipping 5
B. Error
C. Prints 1 to 100
D. None of the above
Correct Answer:
Question: 8
public class Test {
public void print(byte x) {
System.out.print("byte");
}
public void print(Integer x) {
System.out.print("Integer");
}
public void print(Short x) {
System.out.print("Short");
}
public void print(Object x) {
System.out.print("Object");
}
public static void main(String[] args) {
Test t = new Test();
short s = 123;
t.print(s);
t.print(true);
t.print(6.789);
}
}
Select one:
A. IntegerObjectObject
B. IntegerIntegerObject
C. ShortObjectObject
D. byteObjectObject
E. byteObjectObject
Correct Answer:
Question: 9
Given:
public class Test {
public static void main(String [] args) {
int x = 5;
boolean b1 = true;
boolean b2 = false;
if ((x == 4) && !b2 )
System.out.print("1 ");
System.out.print("2 ");
if ((b2 = true) && b1 )
System.out.print("3 ");
}
}
What is the result?
Select one:
A. 2
B. 1 2 3
C. 2 3
D. 1 2
E. 3
Correct Answer:
Question: 10
What will be the output of the following Java program, if
attempted to compile and run this code with command line argument “java Account
ragu raja”?
public class Account
{
Static int
rupee=18000;
public static void main(String arg[])
{
int rupee=12000;
System.out.println(arg[1]+" :Rs."+rupee);
}
}
Select one:
A. Compilation and output raja : Rs.12000
B. Compilation and output raja : Rs.18000
C. Compile time error
D. Compilation and output ragu : Rs.12000
Correct Answer:
Question: 11
class conversion
{
public static
void main(String [] args)
{
double a =
295.04;
int b = 300;
byte c =
(byte)a;
byte d =(byte)
b;
System.out.println(c+ "
" + d);
}
}
Select one:
A. None of these
B. 39 43
C. 39 44
D. 295 300
E. 38 43
Correct Answer: 39 44
Question: 12
Which of the following is not an valid declaration of an
array?
Select one:
A. int a[][]=new int[3][3];
B. int[] a=new int[3];
C. int [][]a=new int[][3];
D. int [][]a=new int[3][];
Correct Answer:
Question: 13
What Java keyword is used to declare a constant?
Select one:
A. Private
B. Static
C. None of the above
D. Final
Correct Answer:
Question: 14
Which of these is not a correct statement?
1. Java support Multilevel Inheritance
2. Abstract class
can be initiated by new operator
3. Abstract class
defines only the structure of the class not its implementation
4. Abstract class
cannot be inherited
Select one:
A. 2
B. 1 and 4
C. 1 and 2
D.1 and 3
Correct Answer:
Question: 15
In Java, int data type is
Select one:
A. Primitive Datatype with 16 bit size
B. Primitive Datatype with 32 bit size
C. Reference Datatype with 16 bit size
D. Reference Datatype with 32 bit size
Correct Answer:
Question: 16
To prevent any method for overriding, we declare the method
as
Select one:
A. final
B. Static
C. const
D. abstract
Correct Answer: final
Question: 17
Which of the following is not the reserved word in Java
Select one:
A. Char
B. Interfaces
C. String
D. Class
Correct Answer:
Question: 18
When function overloading will not happen ?
Select one:
A. More than one method with same name, same signature, same
number of parameters but different type
B. More than one method with same name but different method
signature and different number or type of parameters
C. More than one method with same name, same signature but
different number of signature
D. More than one method with same name, same number of
parameters and type but different signature
Correct Answer:
Question: 19
Which of the following line will not compile assuming x, y
and z are bytes and j is int variable?
Select one:
A. z = 10 * x;
B. x = 3;
C. y = (byte)j;
D. z = a * b;
Correct Answer:
Question: 20
Select one:
A. 34
B. 34 S
C. S
D. Throws exception.
Correct Answer:
Question: 21
public class Test
{
public static void main (String[] args)
{
String foo =
args[1];
String bar =
args[2];
String baz =
args[3];
System.out.println("baz = " + baz); /* Line 8 */
}
}
Command line statement is as follows
java Test .class hello .exe epam
Select one:
A. Runtime Exception
B. baz = .
C. baz = null
D. baz = epam
Correct Answer:
Question: 22
Which of the following is not true about super keyword
Select one:
A. Super never references to base class.
B. The super keyword is available in all non-static methods
of a class.
C. Using super is the only case in which the type of the
reference governs selection of the method implementation to be used
D. Super acts as a reference to the current object as an
instance of its superclass
Correct Answer:
Question: 23
Given:
23. Object []
myObjects = {
24. new Integer(12),
25. new
String("foo"),
26. new Integer(5),
27. new Boolean(true)
28. };
29.
Arrays.sort(myObjects);
30. for(inti=0;
i<myObjects.length; i++) {
31.
System.out.print(myObjects[i].toString());
32.
System.out.print(" ");
33. }
What is the result?
Select one:
A. Compilation fails due to an error in line 23.
B. The value of all four objects prints in natural order.
C. A ClassCastException occurs in line 29.
D. Compilation fails due to an error in line 29.
E. A ClassCastException occurs in line 31.
Correct Answer:
Question: 24
in Java, the range at which a char can span from
Select one:
A. -65535 to 65535
B. -32767 to 32766
C. 0 to 65535
D. -32768 to 32768
Correct Answer:
Question: 25
Which of the following is correct?
Select one:
A. package Members declared with no access modifier are not
accessible in any class at all.
B. package Members declared with private access modifier are
accessible in classes in the other package, as well as in the same class
itself.
C. package Members declared with private access modifier are
accessible in classes in the same package, as well as in the class itself.
D. package Members declared with no access modifier are
accessible in classes in the same package, as well as in the class itself.
Correct Answer:
Question: 26
Which of the following is not true about abstract class?
Select one:
A. Abstract class can contain variables marked with final
keyword
B. An object of abstract class can always be created.
C. Abstract class can contain abstract and non-abstract
methods
D. Each method not implemented in abstract class is also
marked abstract
Correct Answer: An object of abstract class can always be created.
Question: 27
public static void main(String[] args){
/*insert code here*/
array[0]=10;
array[1]=20;
System.out.print(array[0]+":"+array[1]);
}
Which code fragment,
when inserted at line 2, enables the code to print 10:20?
Select one:
A.
Integer array[]=new Integer[2];
for(inti : array.length)
array[i]=new Integer();
B.
int[] array;
array =new int[2];
C.int array = new int[2];
D.int array [2] ;
Correct Answer: B. int[] array;
array =new int[2];
Question: 28
class X{
static int i;
int j;
public static
void main(String[] args){
X x1=
new X();
X x2 =
new X();
x1.i=3;
x1.j=4;
x2.i=5;
x2.j=6;
System.out.println(x1.i
+ " "+ x1.j+ " "+x2.i+ " "+x2.j );
}
}
What is the result?
Select one:
A. 3 4 3 6
B. 3 4 5 6
C. 3 6 4 6
D. 5 4 5 6
Correct Answer:
Question: 29
class Test {
public void display(int x, double y) {
System.out.println(x+y);
}
public double display(int p, double q){
return (p+q);
}
public static void main(String [] args) {
Test test = new Test();
test.display(4, 5.0);
System.out.println(test.display(4,5.0));
} }
Select one:
A. Compilation Error
B. 9.0 9.0
C. 9 9
D. None of these
Correct Answer:
Question: 30
Which of the following are true?
Select one:
A. A public class that has private fields and package
private methods is not visible to classes outside the package.
B. Package private access is more lenient than protected
access.
C.
You can use access modifiers to allow read access to all
methods, but not any instance variables.
E. You can use access modifiers to restrict read access to
all classes that begin with the word Test.
D.
You can use access modifiers so only some of the classes in
a package see a particular package private class.
Correct Answer: You can use access modifiers to allow read access to all methods, but not any instance variables.