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Q11. Given the code fragments: 

What is the result? 

A. Super 

Sub 

Sub 

B. Contract 

Contract 

Super 

C. Compilation fails at line n1 

D. Compilation fails at line n2 

Answer:


Q12. Given: 

What is the result? 

A. Null 

B. Compilation fails 

C. An exception is thrown at runtime 

D. 0 

Answer:


Q13. Given: 

Which two declarations will compile? 

A. int a, b, c = 0; 

B. int a, b, c; 

C. int g, int h, int i = 0; 

D. int d, e, F; 

E. int k, l, m; = 0; 

Answer: AD 


Q14. What is the result? 

A. Valid 

B. Not valid 

C. Compilation fails 

D. An IllegalArgumentException is thrown at run time 

Answer:


Q15. The catch clause argument is always of type__________. 

A. Exception 

B. Exception but NOT including RuntimeException 

C. Throwable 

D. RuntimeException 

E. CheckedException 

F. Error 

Answer:


Q16. 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; 

Answer:


Q17. A method is declared to take three arguments. A program calls this method and passes only two arguments. What is the results? 

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 falsy value for its declared type. 

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

Answer:


Q18. Given: 

What three modifications are necessary to ensure that the class is being properly encapsulated? 

This class is poorly encapsulated. You need to change the circle class to compute and return the area instead. 

A. Change the access modifier of the setradius () method to private 

B. Change the getArea () method public double getArea () { return area; } 

C. When the radius is set in the Circle constructor and the setRadius () method, recomputed the area and store it into the area field 

D. Change the getRadius () method: 

public double getRadius () { 

area = Math.PI * radius * radius; 

return radius; 

Answer: BCD 


Q19. What is the result when this program is executed? 

A. Bob's Name: Bob 

B. Bob's Name: Jian 

C. Nothing prints 

D. Bob’s name 

Answer:


Q20. Given the code fragment: 

What values of x, y, z will produce the following result? 

1 2 3 4 

1 2 3 4 

1 2 3 4 

1 2 3 4 

A. X = 4, Y = 3, Z = 2 

B. X = 3, Y = 2, Z = 3 

C. X = 2, Y = 3, Z = 3 

D. X = 4, Y = 2, Z = 3 

E. X = 2, Y = 3, Z = 4 

Answer: