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Q21. Given: 

What is the result? 

A. One 

B. Two 

C. Three 

D. Compilation fails 

Answer:


Q22. Given: 

What is the result? 

A. 11, 21, 31, 11, 21, 31 

B. 11, 21, 31, 12, 22, 32 

C. 12, 22, 32, 12, 22, 32 

D. 10, 20, 30, 10, 20, 30 

Answer:


Q23. Given the following code: 

What will make this code compile and run? 

A. Change line 2 to the following: 

Public int price 

B. Change line 4 to the following: 

int price = new simple (); 

C. Change line 4 to the following: 

Float price = new simple (); 

D. Change line 5 to the following: 

Price = 4f; 

E. Change line 5 to the following: 

price.price = 4; 

F. Change line 5 to the following: 

Price = (float) 4: 

G. Change line 5 to the following: 

Price = (Simple) 4; 

H. The code compiles and runs properly; no changes are necessary 

Answer:


Q24. Given: 

Which statement, when inserted into line 5, is valid change? 

A. asc = sc; 

B. sc = asc; 

C. asc = (object) sc; 

D. asc = sc.clone () 

Answer:


Q25. Given: 

Which code fragment, when inserted at line 14, enables the code to print Mike Found? 

A. int f = ps.indexOf {new patient (“Mike”)}; 

B. int f = ps.indexOf (patient(“Mike”)); 

C. patient p = new Patient (“Mike”); 

int f = pas.indexOf(P) 

D. int f = ps.indexOf(p2); 

Answer:


Q26. Which is a valid abstract class? 

A. public abstract class Car { 

protected void accelerate(); 

B. public interface Car { 

protected abstract void accelerate(); 

C. public abstract class Car { 

protected final void accelerate(); 

D. public abstract class Car { 

protected abstract void accelerate(); 

E. public abstract class Car { 

protected abstract void accelerate() { 

//more car can do 

}} 

Answer:


Q27. Given the code fragment: 

String h1 = "Bob"; 

String h2 = new String ("Bob"); 

What is the best way to test that the values of h1 and h2 are the same? 

A. if (h1 = = h2) 

B. if (h1.equals(h2)) 

C. if (h1 = = h2) 

D. if (h1.same(h2)) 

Answer:


Q28. Given: 

Javac Jump.java 

Java Jump crazy elephant is always 

What is the result? 

A. Lazy lion is jumping 

B. Lion is always jumping 

C. Crazy elephant is jumping 

D. Elephant is always jumping 

E. Compilation fails 

Answer:


Q29. A method is declared to take three arguments. A program calls this method and passes only two arguments. What is the result? 

A. Compilation fails. 

B. The third argument is given the value null. 

C. The third argument is given the value void. 

D. The third argument is given the value zero. 

E. The third argument is given the appropriate false value for its declared type. 

F. An exception occurs when the method attempts to access the third argument. 

Answer:


Q30. Given the class definitions: 

And the code fragment of the main() method, 

What is the result? 

A. Java 

Java 

Java 

B. Java 

Jeve 

va 

C. Java 

Jeve 

ve 

D. Compilation fails 

Answer: