350 Mock Questions on SCJP 1.5 - JUST Rs.250 or 7 USD
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Mock Exam - 4
Q1
public class Test1{
static void method(Object obj){
System.out.println("Object");
}
static void method(String str){
System.out.println("String");
}
public static void main(String args[]){
method(null);
}
}
What will be the output?
A1
String
A2
Object
A3
null
A4
Compiler Error
Q2
public class Test2{
static void method(StringBuffer obj){
System.out.println("StringBuffer");
}
static void method(String str){
System.out.println("String");
}
public static void main(String args[]){
method(null);
}
}
What will be the output?
A1
String
A2
Object
A3
null
A4
Compiler Error
Q3
class Test{}
public class Test3{
static void method(Object obj){
System.out.println("StringBuffer");
}
static void method(String str){
System.out.println("String");
}
static void method(Test t){
System.out.println("Test");
}
public static void main(String args[]){
method(null);
}
}
What will be the output?
A1
String
A2
Object
A3
Test
A4
Compiler Error
Q4
public class Test4{
public static void main(String args[]){
I i1 = new A();
I i2 = new B();
A a = new A();
System.out.println(i1
instanceof I);
System.out.println(i2
instanceof B);
System.out.println(a
instanceof I);
}
}
interface I{}
class A implements I{}
class B implements I{}
What will be the output?
A1
true true true
A2
true false true
A3
true false false
A4
Compiler Error
Q5
public class Test5{
public static void main(String args[]){
System.out.println(I.k);
}
}
interface I{
int k;
}
What will be the output?
A1
true true true
A2
true false true
A3
true false false
A4
Compiler Error
Q6
public class Test6 implements I{
int k = 1;
public static void main(String args[]){
System.out.println(k);
}
}
interface I{
int k = 0;
}
What will be the output?
A1
0
A2
1
A3
null
A4
Compiler Error
Q7
public class Test7 implements I{
int k = 1;
static{
k = k * 2;
}
{
k = k * 2;
}
public static void main(String args[]){
Test7 t1 = new
Test7();
Test7 t2 = new
Test7();
System.out.println(t1.k);
System.out.println(t2.k);
System.out.println(k);
}
}
What will be the output?
A1
0
A2
1
A3
null
A4
Compiler Error
Q8
public class Test8{
static int k = 1;
static{
k = k * 2;
}
{
k = k * 2;
}
public static void main(String args[]){
System.out.println(k);
}
}
What will be the output?
A1
1
A2
2
A3
4
A4
Compiler Error
Q9
public class Test9{
static int k = 1;
{
k = k * 2;
}
public static void main(String
args[]){
System.out.println(k);
}
}
What will be the output?
A1
1
A2
2
A3
4
A4
Compiler Error
Q10
public class Test10{
final static int k;
static{
k = 0;
}
public static void main(String
args[]){
System.out.println(k);
}
}
What will be the output?
A1
0
A2
1
A3
null
A4
Compiler Error
Answers
1
String
2
Compiler Error
3
Compiler Error
4
true true true
5
true true true
6
Compiler Error
7
Compiler Error
8
2
9
1
10
0
350 Mock Questions on SCJP 1.5 - JUST Rs.250 or 7 USD
Send us mail to sales@javabeat.netmore details
