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Q31. Given: 

package p1; 

public interface DoInterface { 

void method1(int n1); // line n1 

package p3; 

import p1.DoInterface; 

public class DoClass implements DoInterface { 

public DoClass(int p1) { } 

public void method1(int p1) { } // line n2 

private void method2(int p1) { } // line n3 

public class Test { 

public static void main(String[] args) { 

DoInterface doi= new DoClass(100); // line n4 



Which change will enable the code to compile? 

A. Adding the public modifier to the declaration of method1 at line n1 

B. Removing the public modifier from the definition of method1 at line n2 

C. Changing the private modifier on the declaration of method 2 public at line n3 

D. Changing the line n4 DoClass doi = new DoClass ( ); 


Explanation: Private members (both fields and methods) are only accessible inside the class they are declared or inside inner classes. private keyword is one of four access modifier provided by Java and its a most restrictive among all four e.g. public, default(package), protected and private. 

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Q32. Which code fragment cause a compilation error? 

A. flat flt = 100F; 

B. float flt = (float) 1_11.00; 

C. float flt = 100; 

D. double y1 = 203.22; floatflt = y1 

E. int y2 = 100; 

floatflt = (float) y2; 


Q33. Given: 

Which constructor initializes the variable x3? 

A. Only the default constructor of class X 

B. Only the no-argument constructor of class Y 

C. Only the no-argument constructor of class Z 

D. Only the default constructor of object class 


Q34. Given: 

Which two classes use the shape class correctly? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

E. Option E 

F. Option F 

Answer: B,E 

Explanation: When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class (E). However, if it does not, then the subclass must also be declared abstract (B). Note: An abstract class is a class that is declared abstract—it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed. 

Q35. Given: 

public class Test { 

public static void main(String[] args) { 

int arr[] = new int[4]; 

arr[0] = 1; 

arr[1] = 2; 

arr[2] = 4; 

arr[3] = 5; 

int sum = 0; 

try { 

for (int pos = 0; pos <= 4; pos++) { 

sum = sum + arr[pos]; 

} catch (Exception e) { 

System.out.println("Invalid index"); 


What is the result? 

A. 12 

B. Invalid Index 

C. Invalid Index 

D. Compilation fails 


Explanation: The loop ( for (int pos = 0; pos <= 4; pos++) { ), it should be pos <= 3, causes an exception, which is caught. Then the correct sum is printed. 

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Q36. Which of the following data types will allow the following code snippet to compile? 

A. long 

B. double 

C. int 

D. float 

E. byte 

Answer: B,D 


Option B and D are the correct answer. 

Since the variables I and j are floats, resultant will be float type too. So we have to use float 

or primitive type which can hold float, such a primitive type is double, it has wider range 

and also can hold floating point numbers, hence we can use double or float for the blank. 

As explained above options B and D are correct. 

long and int can't be used with floating point numbers so option A is incorrect. 

Option E is incorrect as it have smaller range and also can't be used with floating point 



Q37. Given: 

class Mid { 

public int findMid(int n1, int n2) { 

return (n1 + n2) / 2; 

public class Calc extends Mid { 

public static void main(String[] args) { 

int n1 = 22, n2 = 2; 

// insert code here 


Which two code fragments, when inserted at // insert code here, enable the code to compile and print 12? 

A. Calc c = new Calc(); int n3 = c.findMid(n1,n2); 

B. int n3 = super.findMid(n1,n3); 

C. Calc c = new Mid(); int n3 = c.findMid(n1, n2); 

D. Mid m1 = new Calc(); int n3 = m1.findMid(n1, n2); 

E. int n3 = Calc.findMid(n1, n2); 

Answer: A,D 



Not B: circular definition of n3. 

Not C: Compilation error. line Calc c = new Mid(); 

required: Calc 

found: Mid 

Not E: Compilation error. line int n3 = Calc.findMid(n1, n2); 

non-static method findMid(int,int) cannot be referenced from a static context 

Q38. Given the code fragment: 

What is the result? 

A. May 04, 2014T00:00:00.000 

B. 2014-05-04T00:00: 00. 000 

C. 5/4/14T00:00:00.000 

D. An exception is thrown at runtime. 



java.time.temporal.UnsupportedTemporalTypeException: Unsupported field: HourOfDay 

Q39. Given the following code: 

What are the values of each element in intArr after this code has executed? 

A. 15, 60, 45, 90, 75 

B. 15, 90, 45, 90, 75 

C. 15, 30, 75, 60, 90 

D. 15, 30, 90, 60, 90 

E. 15, 4, 45, 60, 90 


Q40. Given: 

What is the result? 

A. 10 20 30 40 

B. 0 0 30 40 

C. Compilation fails 

D. An exception is thrown at runtime 


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