1z0 808 dumps pdf [May 2017]

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Q41. Given the code fragment: 

What is the result? 

A. Match 1 

B. Match 2 

C. No Match 

D. A NullPointerException is thrown at runtime. 

Answer:

Explanation: 

it will compare the string contents of the StringBuilder with string object. 

Q42. Consider following method 

Which statement is true? 

A. This method is invalid. 

B. This method can be used only in an interface. 

C. This method can return anything. 

D. This method can be used only in an interface or an abstract class. 

E. None of above. 

Answer:

Explanation: 

Given method is declared as default method so we can use it only inside an interface. 

Hence option B is correct and option D is incorrect. 

Option A is incorrect as it is valid method. Option C is incorrect as return type is void, which 

means we can't return anything. 

Q43. Which statement is true about the default constructor of a top-level class? 

A. It can take arguments. 

B. It has private access modifier in its declaration. 

C. It can be overloaded. 

D. The default constructor of a subclass always invokes the no-argument constructor of its superclass. 

Answer:

Explanation: In both Java and C#, a "default constructor" refers to a nullary constructor that is automatically generated by the compiler if no constructors have been defined for the class. The default constructor is also empty, meaning that it does nothing. A programmer-defined constructor that takes no parameters is also called a default constructor. 

Q44. Given: 

Which statement is true? 

A. Both p and s are accessible by obj. 

B. Only s is accessible by obj. 

C. Both r and s are accessible by obj. 

D. p, r, and s are accessible by obj. 

Answer:

Q45. Given: 

public class MyClass { 

public static void main(String[] args) { 

while (int ii = 0; ii < 2) { 

ii++; 

System.out.println("ii = " + ii); 

What is the result? 

A. ii = 1 ii = 2 

B. Compilation fails 

C. The program prints nothing 

D. The program goes into an infinite loop with no output 

E. The program goes to an infinite loop outputting: ii = 1 ii = 1 

Answer:

Explanation: The while statement is incorrect. It has the syntax of a for statement. 

The while statement continually executes a block of statements while a particular condition is true. Its syntax can be expressed as: 

while (expression) { statement(s) } The while statement evaluates expression, which must return a boolean value. If the expression evaluates to true, the while statement executes the statement(s) in the while block. The while statement continues testing the expression and executing its block until the expression evaluates to false. 

Reference: The while and do-while Statements 

Q46. Given the code fragment 

int var1 = -5; 

int var2 = var1–; 

int var3 = 0; 

if (var2 < 0) { 

var3 = var2++; 

} else { 

var3 = –var2; 

System.out.println(var3); 

What is the result? 

A. – 6 

B. – 4 

C. – 5 

D. 5 

E. 4 

F. Compilation fails 

Answer:

Q47. Given the content of three files: 

Which statement is true? Which statement is true? 

A. Only the A.Java file compiles successfully. 

B. Only the B.java file compiles successfully. 

C. Only the C.java file compiles successfully. 

D. The A.Java and B.java files compile successfully. 

E. The B.java and C.java files compile successfully. 

F. The A.Java and C.java files compile successfully. 

Answer:

Explanation: In class B.Java doStuff() has access modifier with variable name which is not allowed. C.Java class name is different than file name. Only private classes can have different names than file names 

Q48. Given the code fragment: 

Which code fragment prints blue, cyan, ? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Q49. Given: 

public class Test { 

static boolean bVar; 

public static void main(String[] args) { 

boolean bVar1 = true; 

int count =8; 

do { 

System.out.println("Hello Java! " +count); 

if (count >= 7) { 

bVar1 = false; 

} while (bVar != bVar1 && count > 4); 

count -= 2; 

What is the result? 

A. Hello Java! 8 Hello Java! 6 Hello Java! 4 

B. Hello Java! 8 Hello Java! 6 

C. Hello Java! 8 

D. Compilation fails 

Answer:

Explanation: Hello Java! 8 

Q50. Given the code fragment? 

public class Test { 

public static void main(String[] args) { 

Test t = new Test(); 

int[] arr = new int[10]; 

arr = t.subArray(arr,0,2); 

// insert code here 

Which method can be inserted at line // insert code here to enable the code to compile? 

A. public int[] subArray(int[] src, int start, int end) { 

return src; 

B. public int subArray(int src, int start, int end) { 

return src; 

C. public int[] subArray(int src, int start, int end) { 

return src; 

D. public int subArray(int[] src, int start, int end) { 

return src; 

Answer:

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