The new language and library capabilities that support functional programming we

Question

The new language and library capabilities that support functional programming were added to Java as part of Project ________.

Utilitarian

Upsilon

Lambda

Utility

1 points   

QUESTION 25

Functional interface Comparator’s default method ________ reverses an existing Comparator’s ordering.

invert

descending

reversed

downward

1 points   

QUESTION 26

Map method ________ performs an operation on each key–value pair.

for

forNext

forEach

forAll

1 points   

QUESTION 27

Stream mutable reduction operation ________ creates a new collection of elements containing the results of the stream’s prior operations.

combine

accumulate

gather

collect

1 points   

QUESTION 28

________ is a method reference for an instance method that should be called on a specific object. It creates a one-parameter lambda that invokes the instance method on the specified object—passing the lambda’s argument to the instance method—and returns the method’s result.

Math::sqrt

System.out::println

TreeMap::new

String::toUpperCase

1 points   

QUESTION 29

Stream method ________ eliminates duplicate objects in a stream.

distinct

discrete

unique

different

1 points   

QUESTION 30

Intermediate Stream operation ________ results in a stream in which each element of the original stream is mapped to a new value (possibly of a different type)—e.g., mapping numeric values to the squares of the numeric values. The new stream has the same number of elements as the original stream.

mapped

map

mapper

mapping

1 points   

QUESTION 31

Collectors static method ________ returns a Collector that counts the number of objects in a given classification, rather than collecting them into a List.

counter

count

counting

enumerate

1 points   

QUESTION 32

Stream mutable reduction operation ________creates an array containing the results of the stream’s prior operations.

array

createArray

toArray

reduceArray

Utilitarian

Upsilon

Lambda

Utility

Explanation / Answer

24.ans)Lambda

The new language and library capabilities that support functional programming were added to Java as part of Project lambda because it supports programming in a multicore environment by adding closures and related features to the Java language.

25.ans)descending

Functional interface Comparator’s default method descending reverses an existing Comparator’s ordering.

26.ans) forEach

Map method forEach performs an operation on each key–value pair.

27.ans) accumulate

Stream mutable reduction operation accumulate creates a new collection of elements containing the results of the stream’s prior operations because a mutable reduction operation that accumulates input elements into a mutable result container, optionally transforming the accumulated result into a final representation after all input elements have been processed.

28.ans) System.out::println

In a method reference, you place the object (or class) that contains the method before the :: operator and the name of the method after it without arguments.

29.ans) distinct

Stream method distinct eliminates duplicate objects in a stream.

30.ans) map

because Stream map() method is useful to map or transform an input collection into a new output collection.

31.ans)count

because it returns a Collector accepting elements of type T that counts the number of input elements.

32.ans)toArray

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.