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2021 Oct 1z0-808 exam guide

Q41. Given: 

What is the result? 

A. int main 1 

B. Object main 1 

C. String main 1 

D. Compilation fails 

E. An exception is thrown at runtime 

Answer:


Q42. Given the code fragment: 

Which statement is true? 

A. After line 8, three objects are eligible for garbage collection 

B. After line 8, two objects are eligible for garbage collection 

C. After line 8, one object is eligible for garbage collection 

D. After line 8, none of the objects are eligible for garbage collection 

Answer:


Q43. Given the code fragment: 

Which option represents the state of the num array after successful completion of the outer loop? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q44. Given the code fragment: 

public class ForTest { 

public static void main(String[] args) { 

int[] array = {1, 2, 3}; 

for ( foo ) { 

Which three code fragments, when replaced individually for foo, enables the program to compile? 

A. int i : array 

B. int i = 0; i < 1; 

C. ; ; 

D. ; i < 1; i++ 

E. i = 0; i<1; 

Answer: A,B,C 


Q45. Given: 

Which two classes use the shape class correctly? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

E. Option E 

F. Option F 

Answer: B,E 

Explanation: When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class (E). However, if it does not, then the subclass must also be declared abstract (B). Note: An abstract class is a class that is declared abstract—it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed. 


Down to date 1z0-808 practice:

Q46. Given: 

Which of the following is equivalent to the above code fragment? 

A. System.out.printLn(x>10?">,': "<":,'="); 

B. System.out.println(x>10? ">"?"<":"="); 

C. System.out.println(x>10?">":x<10?"<":"="); 

D. System.out.printLn(x>10?">"?,'<"?"="); 

E. None of the above 

Answer:

Explanation: 

Option A is incorrect as we can't use abstract with non abstract method, (here method has method body.) Option C is incorrect as when overriding method we can't use more restrictive access modifier, so trying to use private to override default access Level method causes a compile time error. Option D is incorrect as default methods (not methods with default access level) are allowed only in interfaces. Option E is incorrect as method all ready has void as return type, so we can't add int there. Option B is correct as we can use final there, since the method is non abstract 

https://docs.oracle.com/javase/tutorial/java/landl/polymorphism.html 


Q47. Given: 

What is the result? 

A. true true 

B. true false 

C. false true 

D. false false 

E. Compilation fails 

Answer:


Q48. Given the code fragment: 

public class Test { 

public static void main(String[] args) { 

boolean isChecked = false; 

int arry[] = {1,3,5,7,8,9}; 

int index = arry.length; 

while ( <code1> ) { 

if (arry[index-1] % 2 ==0) { 

isChecked = true; 

<code2> 

System.out.print(arry(index]+", "+isChecked)); 

Which set of changes enable the code to print 1, true? 

A. Replacing <code1> with index > 0 and replacing <code2> with index--; 

B. Replacing <code1> with index > 0 and replacing <code2> with --index; 

C. Replacing <code1> with index > 5 and replacing <code2> with --index ; 

D. Replacing <code1> with index and replacing <code2> with --index ; 

Answer:

Explanation: 

Note: Code in B (code2 is --index;). also works fine. 


Q49. Given: 

What is the result? 

A. myStr: 9009, myNum: 9009 

B. myStr: 7007, myNum: 7007 

C. myStr: 7007, myNum: 9009 

D. Compilation fails 

Answer:


Q50. Which statement is/are true? 

I. Default constructor only contains "super();" call. 

II. We can't use any access modifier with a constructor. 

III. A constructor should not have a return type. 

A. Only I. 

B. Only II. 

C. Only I and II. 

D. Only I and III. 

E. AIL 

Answer:

Explanation: 

Statement I is correct as the default constructor only contains super0 call 

Statement II is incorrect as we can use any access modifier with a constructor. 

Statement III is correct as constructor can't have return type, even void. 

So option D is correct. 

httpsy/docs.oracle.com/javase/tutorial/iava/javaOO/construaors.html