Q 1 - Which of the following is correct about Java8?

A - Lambda expression - Adds functional processing capability to Java.

B - Method references - Referencing functions by their names instead of invoking them directly. Using functions as parameter.

C - Default method - Interface to have default method implementation.

D - All of the above.

Q 2 - Which of the following functional interface represents a predicate (Boolean-valued function) of two arguments?

A - BiConsumer<T,U>

B - BiFunction<T,U,R>

C - BinaryOperator<T>

D - BiPredicate<T,U>

Q 3 - Which of the following functional interface represents an operation that accepts a single int-valued argument and returns no result?

A - IntConsumer

B - IntFunction<R>

C - IntPredicate

D - IntSupplier

Q 4 - Which of the following functional interface represents an operation on a single long-valued operand that produces a long-valued result?

A - LongToDoubleFunction

B - LongToIntFunction

C - LongUnaryOperator

D - ObjDoubleConsumer<T>

Q 5 - Which of the following functional interface represents a predicate (Boolean-valued function) of one argument?

A - ObjIntConsumer<T>

B - ObjLongConsumer<T>

C - Predicate<T>

D - Supplier<T>

Q 6 - What is the purpose of map method of stream in java 8?

A - Iterate each element of the stream.

B - Map each element to its corresponding result.

C - Eliminate elements based on a criteria

D - Reduce the size of the stream

Q 7 - Which of the following API represents a simplified date-time API with no complexity of timezone handling in java8?

A - Local

B - Zoned

C - Both of the above.

D - None of the above.

Q 8 - Which of the following is the correct lambda expression which add two numbers and return their sum?

A - (int a, int b) -> a + b;

B - (a, b) -> a + b

C - Both of the above.

D - None of the above.

Q 9 - Method references help to point to methods by their names.

A - true

B - false

Q 10 - Optional.isPresent method checks the value is present or not.

A - false

B - true