41. What will be the output of the following Java program?
class X
{
int a;
double b;
}
class Y extends X
{
int c;
}
class Output
{
public static void main(String args[])
{
X a = new X();
Y b = new Y();
Class obj;
obj = a.getClass();
System.out.print(obj.getName());
}
}
class X
{
int a;
double b;
}
class Y extends X
{
int c;
}
class Output
{
public static void main(String args[])
{
X a = new X();
Y b = new Y();
Class obj;
obj = a.getClass();
System.out.print(obj.getName());
}
}42. Which of these is specified by a File object?
43. What will be the output of the following Java code?
class isinfinite_output
{
public static void main(String args[])
{
Double d = new Double(1 / 0.);
boolean x = d.isInfinite();
System.out.print(x);
}
}
class isinfinite_output
{
public static void main(String args[])
{
Double d = new Double(1 / 0.);
boolean x = d.isInfinite();
System.out.print(x);
}
}44. What will be the output of the following Java program?
class X
{
int a;
double b;
}
class Y extends X
{
int c;
}
class Output
{
public static void main(String args[])
{
X a = new X();
Y b = new Y();
Class obj;
obj = b.getClass();
System.out.print(obj.isLocalClass());
}
}
class X
{
int a;
double b;
}
class Y extends X
{
int c;
}
class Output
{
public static void main(String args[])
{
X a = new X();
Y b = new Y();
Class obj;
obj = b.getClass();
System.out.print(obj.isLocalClass());
}
}45. What happens when a constructor is defined for an interface?
46. Which of the following is an incorrect statement about packages?
47. Which of these data type is returned by every method of OutputStream?
48. What will be the output of the following Java program?
class Output
{
public static void main(String args[])
{
Double i = new Double(257.578123456789);
float x = i.floatValue();
System.out.print(x);
}
}
class Output
{
public static void main(String args[])
{
Double i = new Double(257.578123456789);
float x = i.floatValue();
System.out.print(x);
}
}49. What will be the output of the following Java program?
import java.io.*;
class Chararrayinput
{
public static void main(String[] args)
{
String obj = "abcdef";
int length = obj.length();
char c[] = new char[length];
obj.getChars(0, length, c, 0);
CharArrayReader input1 = new CharArrayReader(c);
CharArrayReader input2 = new CharArrayReader(c, 0, 3);
int i;
try
{
while ((i = input2.read()) != -1)
{
System.out.print((char)i);
}
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
import java.io.*;
class Chararrayinput
{
public static void main(String[] args)
{
String obj = "abcdef";
int length = obj.length();
char c[] = new char[length];
obj.getChars(0, length, c, 0);
CharArrayReader input1 = new CharArrayReader(c);
CharArrayReader input2 = new CharArrayReader(c, 0, 3);
int i;
try
{
while ((i = input2.read()) != -1)
{
System.out.print((char)i);
}
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}50. What will be the output of the following Java program?
import java.io.*;
public class filesinputoutput
{
public static void main(String[] args)
{
String obj = "abc";
byte b[] = obj.getBytes();
ByteArrayInputStream obj1 = new ByteArrayInputStream(b);
for (int i = 0; i < 2; ++ i)
{
int c;
while ((c = obj1.read()) != -1)
{
if (i == 0)
{
System.out.print(Character.toUpperCase((char)c));
obj2.write(1);
}
}
System.out.print(obj2);
}
}
}
import java.io.*;
public class filesinputoutput
{
public static void main(String[] args)
{
String obj = "abc";
byte b[] = obj.getBytes();
ByteArrayInputStream obj1 = new ByteArrayInputStream(b);
for (int i = 0; i < 2; ++ i)
{
int c;
while ((c = obj1.read()) != -1)
{
if (i == 0)
{
System.out.print(Character.toUpperCase((char)c));
obj2.write(1);
}
}
System.out.print(obj2);
}
}
}Read More Section(Interfaces and Abstract Classes)
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