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User:Shyam123.ckp
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JAVA Test Yourself (Open your eye and feel the Open Power!!!!!!)
-Shyama(M.Sc(C.A))
1.How do you create a Reader object from an inputstream object?
- use the static createReader() method of the inputstream class.
- use the static createReader() method of the reader class
- create an inputstreamreader object, passing the inputstream object as an argument to the inputstreamreader constructor(*)
- create an outputstreamreader object, passing the inputstream object as an argument to the outputstreamreader constructor.
2.which of the following are true?
- the sleep() method puts a thread in the ready state.
- the yield() method puts a thread in the waiting state.
- the suspend() method is the preferred method for stopping a thread's execution.
- a thread's interrupt() method results in the throwing of the interruptedexception.(*).
3.which of the following classes have a paint() method?
- canvas(*)
- image
- frame(*)
- graphics
4.which of the following is not a wrapper class?
- string(*)
- integer
- boolean
- character
5.public class Test1{
public static void main(String args[]){
System.out.println(method());
}
public static int method(){
try{
return 1;
}
catch(Exception e){
return 2;
}
finally{
return 3;
}
}
}
What will be the output?
- 1
- 3
- 2
- 4
6.public class Test2{
public static void main(String args[]){
System.out.println(method());
}
public static int method(){
try{
throw new Exception();
return 1;
}
catch(Exception e){
return 2;
}
finally{
return 3;
}
}
}
What will be the output?
- 1
- 2
- 3
- 4
- compiler error
7.public class Test3{
public static void main(String args[]){
System.out.println(method());
}
public static int method(){
try{
throw new Exception();
}
catch(Exception e){
throw new Exception();
}
finally{
return 3;
}
}
}
What will be the output?
- 3
- 0
- Runtime Exception
- Compile Error
8.public class Test4{
public static void main(String args[]){
System.out.println(method());
}
public static int method(){
return;
}
}
What will be the output?
- null
- 0
- Compile Error
- Runtime Exception
9.import java.io.IOException;
public class Test5{
public static void main(String args[]){
try{
throw new IOException();
}
catch(Exception e){
System.out.println("Excepion");
}
catch(IOException e){
System.out.println("IOExcepion");
}
}
}
What will be the output?
- Exception
- IOException
- Exception IOException
- Compilers Error
10.public class Test6{
public static void main(String args[]) throws Exception{
try{
throw new Exception();
}
finally{
System.out.println("No Error");
}
}
}
What will be the output?
- No Error followed by java.lang.Exception
- java.lang.Exception followed by No Error
- No Error
- Compiler Error
11.public class Test7{
public static void main(String args[]) throws Exception{
Test7 t = new Test7();
t.method();
System.out.println("Print");
}
public void method()throws Exception{
throw new Exception();
}
}
What will be the output?
- Exception thrown at runtime
- no output
- Compiler Error
12.public class Test8{
public static void main(String args[]) throws Exception{
Test8 t = new Test8();
t.method();
System.out.println("Print");
}
public void method(){
try{
throw new Exception();
}catch(Exception e){}
}
}
What will be the output?
- Exception thrown at runtime
- no output
- Compiler Error
13.public class Test9 extends A{
public static void main(String args[]) throws Exception{
Test9 t = new Test9();
}
} class A{
A() throws Exception{
System.out.println("A Class");
}
}
What will be the output?
- A Class
- Runtime Exception
- no output
- Compiler Error
14.public class Test10 extends A{
Test10()throws Exception{
System.out.println("Test10 Class");
}
public static void main(String args[]) throws Exception{
Test10 t = new Test10();
}
} class A{
A() throws Exception{
System.out.println("A Class");
}
}
What will be the output?
- A Class Test10 Class
- Runtime Exception
- no output
- Compiler Error
15.public class Test11 extends A{
Test11()throws Exception{
System.out.println("Test10 Class");
}
Test11(int i){}
public static void main(String args[]) throws Exception{
Test11 t = new Test11();
}
} class A{
A() throws Exception{
System.out.println("A Class");
}
}
What will be the output?
- A Class Test10 Class
- Runtime Exception
- no output
- Compiler Error
16.import java.io.IOException;
public class Test12 extends A{
public void method() throws Exception{
System.out.println("Subclass");
}
public static void main(String args[]) throws Exception{
A a = new A();
a.method();
a = new Test12();
a.method();
}
} class A{
public void method() throws IOException{
System.out.println("Superclass");
}
}
What will be the output?
- Subclass Superclass
- Runtime Exception
- Superclass Superclass
- Compiler Error
17.What are the legal arguments types for switch?
- int
- byte
- char
- All the above.
18.public class Test16 extends A{
Test16(){
System.out.println("Sub");
}
public static void main(String args[]) {
Test16 t = new test16();
}
} class A{
A(int i){
System.out.println("Super");
}
}
What will be the output?
- Super Sub
- Super
- Sub
- Compiler Error
19.public class Test17 extends A{
Test17(int i){
System.out.println(i);
super(2);
}
public static void main(String args[]) {
Test17 t = new Test17(5);
}
} class A{
A(int i){
System.out.println(i);
}
}
What will be the output?
- 5 2
- 2 5
- 5 5
- Compiler Error
20.public class Test20 extends A{
Test20(){
this("Hi");
}
Test20(String str){
System.out.println(str);
}
public static void main(String args[]) {
Test20 t = new Test20();
}
} class A{
A(){
System.out.println("Super");
}
}
What will be the output?
- Super Hi
- Hi Super
- Super
- Compiler Error
