Java LTS Features

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Challenge your deep Java knowledge.

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Swati Nikam

India

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Java LTS FeaturesVersión en línea Challenge your deep Java knowledge. por Swati Nikam 1 Which functional interface is primarily used by a lambda with a single input and return value? a Predicate b Function c Supplier d Consumer 2 What method enables a method reference to replace a lambda for instance methods? a ClassName.new b ClassName::constructor c object::instanceMethod d ClassName::staticMethod 3 Which stream terminal operation reduces a stream to a single value? a reduce b flatMap c collect d forEach 4 Which interface must a lambda target in a functional interface? a Multiple abstract methods b Private methods c A single abstract method (SAM) d Static methods only 5 Which Optional API method returns a value when present or a default otherwise? a orElseThrow b get c orElse d orElseGet 6 What is the effect of default methods in interfaces? a Hide methods entirely b Create abstract members c Provide a default implementation d Force overriding 7 Which stream operation is intermediate and stateful? a sorted b map c filter d distinct 8 Which functional interface represents a supplier with no input but a result? a Predicate b Consumer c Function d Supplier 9 In streams, which API enables lazy evaluation and chaining? a Stream API b IO API c Collection API d Array API 10 Which feature allows referencing a static method as a lambda alternative? a Method references b Annealing c Type erasure d Desugaring

Java LTS FeaturesVersión en línea

Challenge your deep Java knowledge.

por Swati Nikam

Which functional interface is primarily used by a lambda with a single input and return value?

Predicate

Function

Supplier

Consumer

What method enables a method reference to replace a lambda for instance methods?

ClassName.new

ClassName::constructor

object::instanceMethod

ClassName::staticMethod

Which stream terminal operation reduces a stream to a single value?

reduce

flatMap

collect

forEach

Which interface must a lambda target in a functional interface?

Multiple abstract methods

Private methods

A single abstract method (SAM)

Static methods only

Which Optional API method returns a value when present or a default otherwise?

orElseThrow

get

orElse

orElseGet

What is the effect of default methods in interfaces?

Hide methods entirely

Create abstract members

Provide a default implementation

Force overriding

Which stream operation is intermediate and stateful?

sorted

map

filter

distinct

Which functional interface represents a supplier with no input but a result?

Predicate

Consumer

Function

Supplier

In streams, which API enables lazy evaluation and chaining?

Stream API

IO API

Collection API

Array API

Which feature allows referencing a static method as a lambda alternative?

Method references

Annealing

Type erasure

Desugaring

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Java LTS Features

Test

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Java LTS FeaturesVersión en línea

por Swati Nikam

Which functional interface is primarily used by a lambda with a single input and return value?

What method enables a method reference to replace a lambda for instance methods?

Which stream terminal operation reduces a stream to a single value?

Which interface must a lambda target in a functional interface?

Which Optional API method returns a value when present or a default otherwise?

What is the effect of default methods in interfaces?

Which stream operation is intermediate and stateful?

Which functional interface represents a supplier with no input but a result?

In streams, which API enables lazy evaluation and chaining?

Which feature allows referencing a static method as a lambda alternative?

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