61)
interface
I{
final
class C1{ //1
static int i=9;; //2
}
}
class
C2 implements I{
public static void main(String a[]){
System.out.println(I.C1.i); ///3
}
}
compile
time error at line 1
compile
time error at line 2
compile
time error at line 3
prints
9
Runtime
exception
Explanation:
interfaces
classes are by default static,final. so,no compile time errors are genearated
Ans:
4
62)
class
C{
public
static void main(String[] args) {
try
{
try
{
try
{
}
catch(RuntimeException e)
{
}
}
catch(Exception e)
{
}
}
catch(NullPointerException e)
{
}
finally
{
System.out.println("finally");
}
}}
Prints
finally
compile
time error
Runtime
Exception
None
of the above
Ans:
1
63)
class
C {
public static void main ( String ka [ ] ) {
while ( false ) {
System.out.println (
"Value" ) ;
}
}
}
compile
time error
prints
Value infinitely
Runtime
Exception
None
of the above
Ans:
1
64)
class
C {
public static void main(String[]
args)
{
System.out.println(4+5+"String");
}
}
prints
9string
prints
45string
compile
time error
Runtime
exception
None
of the above
Explanation:
arguments
to the method are evalutated from left to right so 4+5+"string"
==> 9+string==>9string
Ans:
1
65)
class
H {
public static void main (String[] args) {
String s1 = "HHH";
StringBuffer sb2 = new StringBuffer(s1);
System.out.print(sb2.equals(s1) +
"," + s1.equals(sb2));
}}
Prints:
false,false
Prints:
true,false
Prints:
false,true
Prints:
true,true
None
of the above
Explanation:
s1
and sb2 are pointing to different object references
Ans:
1
66)
The
relationship between a class and its superclass is
has-a
is
-a
None
of the above
Ans:
2
67)
class
A extends Thread {
private int i;
public void run() {i = 1;}
public static void main(String[] args) {
A a = new A();
a.run();
System.out.print(a.i);
}}
How
many threads are created in this Program?
Ans:
1
Ans:
2
Ans:
3
Ans:None
of the above
Explanation:
Main
thread is a thread and calling run methods will not creat thread.
Ans:
1
68)
String
objects once created can not be modified
true
false
Ans:
1
69)
Which
of the following modifiers can be applied to a class that is not a nested
class?
public
protected
private
static
Ans:
1
No comments:
Post a Comment