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SCJP
Sample questions
The following questions
are sample questions for SCJP
If any queries regarding the questions or answers please mail us |
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51)
Which of the following methods are static members of the Thread class?
join
run
sleep
start
wait
Explanation:
No Explanation Available
Ans: 3 |
52)
class C {
public static void main(String[] args) {
try
{
int i1=3/0;
}
System.out.println("hai");
catch(NullpointerException e)
{
}
finally
{
System.out.println("finally);
}
}}
compile time errors
print hai and finally
the code compiles and runs fine
none of the above
Explanation:
No Explanation Available
Ans: 1
53)
class c1
{
public static void main(String a[])
{
System.out.println(Double.NaN==Double.NaN);
System.out.println(Double.NaN!=Double.NaN);
System.out.println(Float.NaN==Double.NaN);
}
}
prints false true false
print true false true
prints true true true
prints false false false
compiletime error
Explanation:
No Explanation Available
Ans: 1
54)
class C {
public static void main ( String ka [ ] ) {
Thread t =
Thread . currentThread ( ) ;
t . setPriority
( - 1 ) ;
System . out .
println ( " Done ! " ) ;
}
};
compile time error
Runtime Exception
The code compiles and runs fine
None of the above
Explanation:
No Explanation Available
Ans: 2
55)
class c1
{
public void m1()
{
System.out.println("m1 method in
C1 class");
}
}
class c2
{
public c1 m1()
{
return new c1(){
public void m1()
{
System.out.println("m1 mehod in anonymous class");
}};}
public static void main(String a[])
{
c1 ob1 =new c2().m1();
ob1.m1();
}}
prints m1 method in C1 class
prints m1 method in anonumous class
compile time error
Runtime error
none of the above
Explanation:
the anonymous class overrides the m1 method in c1.so according to the
dynamic dispatch the m1 method in the anonymous is called
Ans: 2
56)
class c1 extends Exception
{}
class c2
{
static void m1()
{
throw new c1();
}
public static void main(String a[])
{
}
}
compile time error
Runtime Exception
The code compiles and runs fine
None of the above
Explanation:
No Explanation Available
Ans: 1
57)
class C {
static void m1(Object x) {System.out.print("Object");}
static void m1(String x) {System.out.print("String");}
public static void main(String[] args) {
m1(null);
}}
Prints Object
Prints String
compiletime error
None of the above
Explanation:
The more specific of the two, m(String x), is chosen
Ans: 2
58)
all classes of the java.lang package are automatically imported
true
false
Explanation:
No Explanation Available
Ans: 1
59)
The constructor for the Math class is private, so it cannot be
instaniated
true
false
Explanation:
No Explanation Available
Ans: 1
60)
class C {
public static void main(String[] args) {
int x=2;
int y=3;
if((y==x++)|(x<++y)){
System.out.println(x+""+y);
}
}}
prints 34
prints 33
compile time error
Runtime exception
None of the above
Explanation:
No Explanation Available
Ans: 1
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