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2017 Mar 1z0-808 free practice exam

Q11. Given: 

public class ComputeSum { 

public int x; 

public int y; 

public int sum; 

public ComputeSum (int nx, int ny) { 

x = nx; y =ny; 

updateSum(); 

public void setX(int nx) { x = nx; updateSum();} 

public void setY(int ny) { x = ny; updateSum();} 

void updateSum() { sum = x + y;} 

This class needs to protect an invariant on the sum field. 

Which three members must have the private access modifier to ensure that this invariant is maintained? 

A. The x field 

B. The y field 

C. The sum field 

D. The ComputerSum ( ) constructor 

E. The setX ( ) method 

F. The setY ( ) method 

Answer: C,E,F 

Explanation: The sum field and the two methods (setX and SetY) that updates the sum field. 


Q12. Given the code fragment: 

Which code fragment, when inserted at // insert code here, enables the code to compile and and print a b c? 

A. List update (String[] strs) 

B. Static ArrayListupdate(String [] strs) 

C. Static List update (String [] strs) 

D. Static void update (String[] strs) 

E. ArrayList static update(String [] strs) 

Answer:


Q13. int [] array = {1,2,3,4,5}; 

for (int i: array) { 

if ( i < 2) { 

keyword1 ; 

System.out.println(i); 

if ( i == 3) { 

keyword2 ; 

}} 

What should keyword1 and keyword2 be respectively, in oreder to produce output 2345? 

A. continue, break 

B. break, break 

C. break, continue 

D. continue, continue 

Answer:


Q14. Given the code fragment: 

Which three code fragments can be independently inserted at line nl to enable the code to print one? 

A. Byte x = 1; 

B. short x = 1; 

C. String x = "1"; 

D. Long x = 1; 

E. Double x = 1; 

F. Integer x = new Integer ("1"); 

Answer: A,B,F 


Q15. Given the code fragment: 

What is the result? 

A. Values are : [EE, ME] 

B. Values are : [EE, EE, ME] 

C. Values are : [EE, ME, EE] 

D. Values are : [SE, EE, ME, EE] 

E. Values are : [EE, ME, SE, EE] 

Answer:


Down to date 1z0-808 test question:

Q16. Given the following classes: 

Which two options fail to compile when placed at line n1 of the main method? 

A. employee.salary = 50_000; 

B. director.salary = 80_000; 

C. employee.budget = 200_000; 

D. manager.budget = 1_000_000; 

E. manager.stockOption = 500; 

F. director.stockOptions = 1_000; 

Answer: C,E 


Q17. Given: 

What is result? 

A. Successful 

B. Unsuccessful 

C. Compilation fails 

D. An exception is thrown at runtime 

Answer:


Q18. 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. 

Answer:


Q19. Which statement will empty the contents of a StringBuilder variable named sb? 

A. sb.deleteAll(); 

B. sb.delete(0, sb.size()); 

C. sb.delete(0, sb.length()); 

D. sb.removeAll(); 

Answer:


Q20. Given: 

public class App { // Insert code here System.out.print("Welcome to the world of Java"); } } 

Which two code fragments, when inserted independently at line // Insert code here, enable the program to execute and print the welcome message on the screen? 

A. static public void main (String [] args) { 

B. static void main (String [] args) { 

C. public static void Main (String [] args) { 

D. public static void main (String [] args) { 

E. public void main (String [] args) { 

Answer: A,D 

Explanation: 

Incorrect: 

Not B: No main class found. 

Not C: Main method not found 

not E: Main method is not static.