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Latest Update Oracle 1Z0-808 Exam Practice Questions and Answers Online Test

QUESTION 1
Given the following class declarations:
1.
public abstract class Animal
2.
public interface Hunter
3.
public class Cat extends Animal implements, Hunter
4.
public class Tiger extends Cat
Which answer fails to compile?

A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Correct Answer: E
Explanation: Look at the right side of the declaration ArrayLIst() rather than ArrayList

QUESTION 2
Given:
public class Marklist {
int num;
public static void graceMarks(Marklist obj4) {
obj4.num += 10;
}
public static void main(String[] args) {
MarkList obj1 = new MarkList();
MarkList obj2 = obj1;
MarkList obj1 = null;
obj2.num = 60;
graceMarks(obj2);
}
}
How many objects are created in the memory runtime?
A. 1
B. 2
C. 3
D. 4
Correct Answer: B
Explanation: obj1 and obj3.
when you do e2 = e1 you\\’re copying object references – you\\’re not making a copy of the object – and so the variables
e1 and e2 will both point to the same object.

QUESTION 3
Given the code fragments:

Which code fragment, when inserted at line ni, enables the code to print Hank?
A. checkAge (iList, ( ) -> p. get Age ( ) > 40);
B. checkAge(iList, Person p -> p.getAge( ) > 40);
C. checkAge (iList, p -> p.getAge ( ) > 40);
D. checkAge(iList, (Person p) -> { p.getAge() > 40; });
Correct Answer: C

QUESTION 4
Given:

What is the result?
A. 1
B. 1
C. 2
D. Compilation fails
E. The loop executes infinite times
Correct Answer: E

QUESTION 5
Given the code fragment:

Which code fragment, when inserted at line 9, enables the code to print true?
A. String str2 = str1;
B. String str2 = new String (str1);
C. String str2 = sb1. toString ();
D. String str2 = “Duke”;
Correct Answer: A

QUESTION 6
Given the code fragment:

Which code fragment, when inserted at // insert code here, enables the code to compile and print a bc?
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)
Correct Answer: E

QUESTION 7
Given the code fragment:

What is the result?
A. Jesse 25 Walter 52
B. Compilation fails only at line n1
C. Compilation fails only at line n2
D. Compilation fails at both line n1 and line n2
Correct Answer: D

QUESTION 8
Given:

A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
F. Option F
Correct Answer: BE
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.

QUESTION 9
Given the code in a file Traveler.java:

And the commands: Javac Traveler.java Java Traveler Java Duke What is the result?
A. Happy Journey! Duke
B. Happy Journey! Java
C. An exception is thrown at runtime
D. The program fails to execute due to a runtime error
Correct Answer: D

QUESTION 10
Which two statements are true? (Choose two.)
A. Error class is unextendable.
B. Error class is extendable.
C. Error is a RuntimeException.
D. Error is an Exception.
E. Error is a Throwable.
Correct Answer: BC

QUESTION 11
Which statement is/are true?
A. 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.
B. Only I.
C. Only II.
D. Only I and II.
E. Only I and III.
F. AIL
Correct Answer: D
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 a return type, even void.
So option D is correct.
https://docs.oracle.com/javase/tutorial/iava/javaOO/construaors.html

QUESTION 12
Given:

What is the result?
A. Base DerivedA
B. Base DerivedB
C. DerivedB DerivedB
D. DerivedB DerivedA
E. A classcast Except ion is thrown at runtime.
Correct Answer: C

QUESTION 13
Which of the following will print current time?
A. System.out.print(new LocalTime()-now0);
B. System.out.print(new LocalTime());
C. System.ouLprint(LocalTime.now());
D. System.ouLprint(LocalTime.today());
E. None of the above.
Correct Answer: C
The LocalTime is an interface, so we can\\’t use new keyword with them. So options A and C are incorrect.
To get current time we can call now method on LocalTime interface. So option C is correct. Option D is incorrect as
there is no method called today as in LocalTime interface
https://docs.oracle.com/javase/tutorial/datetime/iso/datetime.html

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