Question 1

Given:

List list1 = new ArrayList<>();

list1.add(“A”);

list1.add(“B”);

List list2 = List.copyOf(list1);

list2.add(“C”);

List> list3 = List.of(list1, list2);

System.out.println(list3);

What is the result?

Options :

A : [[A, B],[A, B]]

B : An exception is thrown at run time.

C : [[A, B], [A, B, C]]

D : [[A, B, C], [A, B, C]]

Answer: B

Question 2

Given:

Assuming that this code compiles correctly, which three statements are true? (Choose three.)

Options :

A : B cannot be abstract.

B :

B is a subtype of A.

C : A cannot be abstract.

D : A cannot be final.

E : B cannot be final.

F : A is a subtype of B.

Answer: A,B,D

Question 3

What is the result?

Options :

A : 9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

B :

9001: APPLICATION ERROR-9001-MyFile.txt 9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

C : 9001: APPLICATION ERROR-9001-MyFile.txt

D : Compilations fails at Line 1.

Answer: D

Question 4

Which two statements are true about a class that is marked @Deprecated?

Options :

A : There Is always another class that can be used Instead of the deprecated class.

B : Using the class will cause the Java compiler to give a warning.

C : The class cannot be extended.

D : The author of the class wants to discourage people from using the class in any way.

E : Using the class Is guaranteed to cause errors at runtime.

Answer: B,D

Question 5

Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

Options :

A :

.map(Employee::getLocality)

.distinct()

.count();

B :

map(e > e.getLocality())

.count();

C :

.map(e > e.getLocality())

.collect(Collectors.toSet())

.count();

D :

.filter(Employee::getLocality)

.distinct()

.count();

Answer: D

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