home.softwaretechit.com
Study and learn
Interview MCQ Questions and Answers on Java Method Overloading. Attend job
interviews easily with these Multiple Choice Questions. You can print these
Questions in default mode to conduct exams directly. You can download these
MCQs in PDF format by Choosing Print Option first and Save as PDF option next
using any Web Browser.
Go through Java Theory Notes on Method
Overloading before
reading these objective questions.
 |
1) To successfully overload a method in Java, the return types must
be ___.
A) Same
B) Different
C) Same but
using superclass or subclass types also work
D) None
Answer [=]
C
2) To successfully overload a method in Java, the argument-list or
parameter-list must be ___.
A) Same
B) Different
C) -
D) -
Answer [=]
B
3) What is the output of the below Java program with multiple
methods?
public class MethodOverloading1
{
void show(int a, char b)
{
System.out.println("KING
KONG");
}
void show(char a, int b)
{
System.out.println("JIM JAM");
}
public static void
main(String[] args)
{
MethodOverloading1 m = new
MethodOverloading1();
m.show(10, 'A');
m.show('B', 10);
}
}
A)
JIM JAM
JIM JAM
B)
KING KONG
KING KONG
C)
KING KONG
JIM JAM
D) compiler
error
Answer [=]
C
Explanation:
Method
signatures are clearly different. So both methods work.
4) To successfully overload a method in Java, the method names must
be ___.
A) Same
B) Different
C) Same or
different
D) None
Answer [=]
A
5) What is the output of the below Java program?
public class MethodOverloading2
{
int info()
{
System.out.println("PLANE");
return 0;
}
void info()
{
System.out.println("AIRPORT");
}
public static void
main(String[] args)
{
MethodOverloading2 m = new
MethodOverloading2();
int a = m.info();
}
}
A) PLANE
B) AIRPORT
C) Compiler
error
D) None
Answer [=]
C
Explanation:
Both methods
with the same name "info" do not overload successfully as the return
types are different (void and int).
6) What is the output of the below Java program with method
overloading?
class Wood{ }
class SubWood extends Wood{ }
public class MethodOverloading3
{
Wood display(int a)
{
System.out.println("PINE");
return new Wood();
}
SubWood display()
{
System.out.println("TEAK");
return new SubWood();
}
public static void
main(String[] args)
{
MethodOverloading3 m = new
MethodOverloading3();
m.display();
}
}
A) PINE
B) TEAK
C) Compiler
error
D) None
Answer [=]
B
Explanation:
Return types
for the method display() are Wood and SubWood. As these types are of
superclass-subclass, it is a valid method overloading.
7) What is the output of the below Java program trying to overload a
method "jump"?
class Rabbit{ }
class WildRabbit extends Rabbit{ }
public class MethodOverloading4
{
Rabbit jump()
{
System.out.println("Rabbit Jump");
return new Rabbit();
}
WildRabbit jump()
{
System.out.println("Wild Rabbit Jump");
return new WildRabbit();
}
public static void
main(String[] args)
{
MethodOverloading4 obj =
new MethodOverloading4();
obj.jump();
}
}
A) Rabbit Jump
B) Wild Rabbit
Jump
C) Compiler
error
D) None
Answer [=]
C
Explanation:
The above
program does not overload the method jump() properly as the argument list is
not distinct. So the compiler reports "duplicate method error".
8) Java method overloading implements the OOPS concept ___.
A) Inheritance
B) Polymorphism
C) Encapsulation
D) None
Answer [=]
B
9) Which is the overloaded static method of Math class to get
absolute value in Java?
A)
Math.abs(int)
B)
Math.abs(float)
C)
Math.abs(double)
D) All the
above
Answer [=]
D
Explanation:
Notice that
static methods can be overloaded in Java without any compiler error. So,
Math.abs() works out of the box with different type arguments.
10) What is the output of the below Java program that tries to
overload a method "abs"?
public class MyAbs
{
static int abs(int a)
{
return a<0?-a:a;
}
static float abs(float b)
{
return b<0?-b:b;
}
static double abs(double c)
{
return c<0?-c:c;
}
public static void
main(String[] args)
{
int a=-10;
float b=-4.56f;
double c=-10.123;
System.out.println(MyAbs.abs(a) + ", " + MyAbs.abs(b) +
", " + MyAbs.abs(c));
}
}
A) No output
B) Compiler
error
C) 10, 4.56,
10.123
D) -10, -4.56,
-10.123
Answer [=]
C
Explanation:
The above
program demonstrates the usage of Overloaded methods. "abs" function
returns the absolute value of the input.
0 Comments