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Q71. Given the following two classes: 

How should you write methods in the ElectricAccount class at line n1 so that the member variable bill is always equal to the value of the member variable kwh multiplied by the member variable rate? 

Any amount of electricity used by a customer (represented by an instance of the customer class) must contribute to the customer's bill (represented by the member variable bill) through the method useElectricity method. An instance of the customer class should never be able to tamper with or decrease the value of the member variable bill. 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q72. Given the code fragment: 

What is the result? 

A. Sum is 600 

B. Compilation fails at line n1. 

C. Compilation fails at line n2. 

D. A ClassCastException is thrown at line n1. 

E. A ClassCastException is thrown at line n2. 

Answer:

Q73. Given the code fragment: 

Which two modifications, made independently, enable the code to compile? 

A. Make the method at line n1 public. 

B. Make the method at line n2 public. 

C. Make the method at line n3 public. 

D. Make the method at line n3 protected. 

E. Make the method at line n4 public. 

Answer: C,D 

Q74. Given: class Base { 

public static void main(String[] args) { 

System.out.println("Base " + args[2]); 

public class Sub extends Base{ 

public static void main(String[] args) { 

System.out.println("Overriden " + args[1]); 

And the commands: 

javac Sub.java 

java Sub 10 20 30 

What is the result? 

A. Base 30 

B. Overridden 20 

C. Overridden 20 Base 30 

D. Base 30 Overridden 20 

Answer:

Q75. Given the code fragment: 

What is the result? 

A. 1:2:3:4:5: 

B. 1:2:3: 

C. Compilation fails. 

D. An ArrayoutofBoundsException is thrown at runtime. 

Answer:

Q76. Given the code fragment: 

Which code fragment prints red: blue: small: medium? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q77. Given: 

What is the result? 

A. 0 Done 

B. First Exception Done 

C. Second Exception 

D. Done Third Exception 

E. Third Exception 

Answer:

Q78. Given: 

What is the result? 

A. myStr: 9009, myNum: 9009 

B. myStr: 7007, myNum: 7007 

C. myStr: 7007, myNum: 9009 

D. Compilation fails 

Answer:

Q79. Given: 

What is the result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q80. Given: 

What is the result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

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