Question 1

Given:

Which statement on line 1 enables this code fragment to compile?

Options :

A : Function function = String::toUpperCase;

B : UnaryOperator function = s > s.toUpperCase();

C : UnaryOperator<String> function = String::toUpperCase;

D : Function<String> function = m > m.toUpperCase();

Answer: C

Question 2

Given the code fragment:

What is the result?

Options :

A : [Lettuce, Kale]

B : A compilation error is thrown.

C : [Lettuce, Kale] [Seabass, Salmon]

D : [Kale, Lettuce] [Salmon, Seabass]

Answer: B

Question 3

Given:

After which line can we insert assert i < 0 || values[i] <= values[i + 1]; to verify that the

values array is partially sorted?

Options :

A : after line 8

B : after line 6

C : after line 5

D : after line 10

Answer: B

Question 4

Given:

What is the expected result of javac?

Options :

A : javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist

B : javac compiles Mycar.java without errors or warnings.

C : javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang

D : javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class

Answer: B

Question 5

Which three annotation uses are valid? (Choose three.)

Options :

A : Function<String, String> func = (@NonNull x) > x.toUpperCase();

B : var v = ''Hello'' + (@Interned) ''World''

C : Function<String, String> func = (var @NonNull x) > x.toUpperCase();

D : Function<String, String> func = (@NonNull var x) > x.toUpperCase();

E : var myString = (@NonNull String) str;

F : var obj = new @Interned MyObject();

Answer: A,C

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