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Q121. Given the code fragment from three files: 

Which code fragment, when inserted at line 2, enables the code to compile? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

E. Option E 


Q122. Given the code in a file 

And the commands: 


Java Traveler Java Duke What is the result? 

A. Happy Journey! Duke 

B. Happy Journey! Java 

C. An exception is thrown at runtime 

D. The program fails to execute due to a runtime error 


Q123. Given the code fragment: 

What is the result? 

A. Element 0 Element 1 

B. Null element 0 Null element 1 

C. Null Null 

D. A NullPointerException is thrown at runtime. 


Q124. Given the code fragment: 

int b = 3; 

if ( !(b > 3)) { 

System.out.println("square "); 


System.out.println("circle "); 


What is the result? 

A. square... 

B. circle... 

C. squarecircle... 

D. Compilation fails. 


Q125. 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 

Q126. What is the name of the Java concept that uses access modifiers to protect variables and hide them within a class? 

A. Encapsulation 

B. Inheritance 

C. Abstraction 

D. Instantiation 

E. Polymorphism 


Q127. Given: 

What is the result? 

A. Red 0 

Orange 0 

Green 3 

B. Red 0 

Orange 0 

Green 6 

C. Red 0 

Orange 1 

D. Green 4 

E. Compilation fails 


Q128. boolean log3 = ( 5.0 != 6.0) && ( 4 != 5); 

boolean log4 = (4 != 4) || (4 == 4); 

System.out.println("log3:"+ log3 + \nlog4" + log4); 

What is the result? 

A. log3:false log4:true 

B. log3:true log4:true 

C. log3:true log4:false 

D. log3:false log4:false 


Q129. Given the following code: 

What is the output? 

A. 4 

B. 3 

C. 4 

D. 5 

E. 4 

F. 4 



Q130. Given: 

What is the output? 

A. [21, 13, 11] 

B. [30] 

C. [] 

D. Compilation fails due to error at line 7 

E. Compilation tails due to error at line 10 



Option D is the correct answer. 

Code fails to compile as we can't use primitive for collections type, so in this code trying to 

use int at line 7, causes a compile error. We should have use wrapper. Integer there. So 

option D is correct.