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OCPJP 6 Mock Exam – 3

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Q 1 : What will be the output?

[code lang=”java”]
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;
}
}
}
[/code]

Choose the one below:

  1. 1
  2. 2
  3. 3
  4. 0

Q 2 : What will be the output?

[code lang=”java”]
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;
}
}
}
[/code]

Choose the one below:

  1. 1
  2. 2
  3. 3
  4. 4
  5. Compiler error

Q 3 : What will be the output?

[code lang=”java”]
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;
}
}
}
[/code]

Choose the one below:

  1. 3
  2. 0
  3. Runtime Exception
  4. Compiler error

Q 4 : What will be the output?

[code lang=”java”]
public class Test4{
public static void main(String args[]){
System.out.println(method());
}
public static int method(){
return;
}
}
[/code]

Choose the one below:

  1. null
  2. 0
  3. Runtime exception
  4. Compiler error

Q 5 : What will be the output?

[code lang=”java”]
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");
}
}
}
[/code]

Choose the one below:

  1. Exception
  2. IOException
  3. Exception IOException
  4. Compilers error

Q 6 : What will be the output?

[code lang=”java”]
public class Test6{
public static void main(String args[]) throws Exception{
try{
throw new Exception();
}
finally{
System.out.println("No Error");
}
}
}
[/code]

Choose the one below:

  1. No Error followed by java.lang.Exception
  2. java.lang.Exception followed by No Error
  3. No Error
  4. Compiler Error

Q 7 : What will be the output?

[code lang=”java”]
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();
}
}
[/code]

Choose the one below:

  1. Print
  2. Exception thrown at runtime
  3. no output
  4. Compiler Error

Q 8 : What will be the output?

[code lang=”java”]
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){}
}
}
[/code]

Choose the one below:

  1. Print
  2. Exception thrown at runtime
  3. no output
  4. Compiler Error

Q 9 : What will be the output?

[code lang=”java”]
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");
}
}
[/code]

Choose the one below:

  1. A Class
  2. Runtimxception
  3. no output
  4. Compiler Error

Q 10 : What will be the output?

[code lang=”java”]
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");
}
}
[/code]

Choose the one below:

  1. A Class Test10 Class
  2. Runtimxception
  3. no output
  4. Compiler Error

Q 11 : What will be the output?

[code lang=”java”]
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");
}
}
[/code]

Choose the one below:

  1. A Class Test10 Class
  2. Runtimxception
  3. no output
  4. Compiler Error

Q 12 : What will be the output?

[code lang=”java”]
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");
}
}
[/code]

Choose the one below:

  1. Subclass Superclass
  2. Runtimxception
  3. Superclass Superclass
  4. Compiler Error

Q 13 : What are the legal arguments types for switch?

  1. int
  2. byte
  3. char
  4. All the above.

Q 14 : Which of the following are valif if constructs?

  1. if(2>3){}
  2. if(false){}
  3. if(false){}
  4. if(true)

Q 15 : What will be the output?

[code lang=”java”]
public class Test15{
public static void main(String args[]) throws Exception{
for (int i = 0;i < 3;i++){
for (int j = 0;j < 3;j++){
System.out.print(i);
System.out.print(j+",");
break;
}
}
}
}
[/code]

Choose the one below:

  1. 00,
  2. 00,10,20,
  3. 000102
  4. None of the above

Q 16 : What will be the output?

[code lang=”java”]
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");
}
}
[/code]

Choose the one below:

  1. Super Sub
  2. Super
  3. Sub
  4. Compiler Error

Q 17 : What will be the output?

[code lang=”java”]
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);
}
}
[/code]

Choose the one below:

  1. 5 2
  2. 2 5
  3. 5 5
  4. Compiler error

Q 18 : What will be the output?

[code lang=”java”]
public class Test18 {
Test18(){
this(7);
}
Test18(int i){
this(1.0);
Test18(i);
}
Test18(float f){
System.out.println(f * 2);
}
Test18(double d){
System.out.println(d * 3);
}
void Test18(int i){
System.out.println(i);
}
public static void main(String args[]) {
Test18 t = new Test18();
}
}
[/code]

Choose the one below:

  1. 3.0 7
  2. 2.0 7
  3. 7 3.0
  4. Compiler Error

Q 19 : What will be the output?

[code lang=”java”]
public class Test19 {
float f;
Test19(){
this(f);
f = 3;
}
Test19(float f){
System.out.println(f);
}
public static void main(String args[]) {
Test19 t = new Test19();
}
}
[/code]

Choose the one below:

  1. 0.0
  2. 0
  3. 3
  4. Compiler error

Q 20 : What will be the output?

[code lang=”java”]
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");
}
}
[/code]

Choose the one below:

  1. Super Hi
  2. Hi Super
  3. Super
  4. Compiler Error

Q 21 : What will be the output?

[code lang=”java”]
public class Test21{
public static void main(String args[]) {
Test21 t;
t.method();
}
public static void method(){
System.out.println("NullPointerException");
}
}
[/code]

Choose the one below:

  1. Nothing is printed.
  2. RuntimeException
  3. NullPointerException
  4. Compiler Error

Q 22 : What will be the output?

[code lang=”java”]
public class Test22{
public static void main(String args[]) {
Test22 t = null;
t.method();
}
public static void method(){
System.out.println("NullPointerException");
}
}
[/code]

Choose the one below:

  1. Nothing is printed.
  2. RuntimeException
  3. NullPointerException
  4. Compiler Error

Q 23 : Which of the following modifiers are allowed in constructor?

  1. private
  2. default
  3. public
  4. static

Q 24 : Which of the following modifiers are allowed for top-level classes?

  1. private
  2. static
  3. public
  4. strictfp

Q 25 : which one of the keyword cannot be used with instance variables?

  1. transient
  2. volatile
  3. synchronized
  4. abstract

Answers

Q 1 : 3 is correct. 3.

Q 2 : 4 is correct. Compiler Error.

Q 3 : 4 is correct. Compiler Error.

Q 4 : 4 is correct. Compiler Error.

Q 5 : 4 is correct. Compiler Error.

Q 6 : 1 is correct. No Error followed by java.lang.Exception

Q 7 : 2 is correct. Exception thrown at runtime.

Q 8 : 1 is correct. Print.

Q 9 : 4 is correct. Compiler Error.

Q 10 : 1 is correct. A Class Test10 Class.

Q 11 : 4 is correct. Compiler Error.

Q 12 : 4 is correct. Compiler Error.

Q 13 : 4 is correct. All the above.

Q 14 : 1 is correct. if(2>3){}
2 is correct. if(false){}
4 is correct. if(true){}

Q 15 : 2 is correct. 00,10,20,

Q 16 : 4 is correct. Compiler Error.

Q 17 : 4 is correct. Compiler Error.

Q 18 : 1 is correct. 3.0 7

Q 19 : 4 is correct. Compiler Error.

Q 20 : 1 is correct. Super Hi.

Q 21 : 4 is correct. Compiler Error.

Q 22 : 3 is correct. NullPointerException.

Q 23 : 1 is correct. private.
3 is correct. public.

Q 24 : 4 is correct. strictfp.
3 is correct. public.

Q 25 : 3 is correct. synchronized.
4 is correct. abstrct.

About Krishna Srinivasan

He is Founder and Chief Editor of JavaBeat. He has more than 8+ years of experience on developing Web applications. He writes about Spring, DOJO, JSF, Hibernate and many other emerging technologies in this blog.

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