Quiz-2

Test

Jugadas 20

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Test your Streams knowledge

Creada por

Jeni Alex

India

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Quiz-2Versión en línea Test your Streams knowledge por Jeni Alex 1 Which Stream method returns an Optional when used on a stream? a map b findFirst c collect d forEach 2 Which operation is a terminal operation on streams? a collect b flatMap c map d filter 3 Fill in the blank: The intermediate operation that transforms each element is called ________. a filter b reduce c flatMap d map 4 True or False: A Stream is lazy and only evaluates when a terminal operation is invoked. a sometimes b depending c false d true 5 Fill in the blank: flatMap is used to flatten a stream of streams into a single stream called a ________ stream. a merged b nested c combined d flat 6 Which method creates a stream from a Collection? a Arrays.stream() b collection.stream() c new Stream() d Stream.of() 7 True or False: Parallel streams can utilize multiple CPU cores for better performance. a only for I/O operations b false c true d only on Windows 8 Which operation sorts the elements in a stream? a sorted() b order() c repeat() d shuffle() 9 Fill in the blank: To collect results into a List, you typically use collect(Collectors.toList()) — this is a ______ operation. a non-terminal b intermediate c terminal d short-circuit 10 True or False: Streams can modify the underlying source collection while processing. a true b false c only if synchronized d depends on the JVM

Quiz-2Versión en línea

Test your Streams knowledge

por Jeni Alex

Which Stream method returns an Optional when used on a stream?

map

findFirst

collect

forEach

Which operation is a terminal operation on streams?

collect

flatMap

map

filter

Fill in the blank: The intermediate operation that transforms each element is called ________.

filter

reduce

flatMap

map

True or False: A Stream is lazy and only evaluates when a terminal operation is invoked.

sometimes

depending

false

true

Fill in the blank: flatMap is used to flatten a stream of streams into a single stream called a ________ stream.

merged

nested

combined

flat

Which method creates a stream from a Collection?

Arrays.stream()

collection.stream()

new Stream()

Stream.of()

True or False: Parallel streams can utilize multiple CPU cores for better performance.

only for I/O operations

false

true

only on Windows

Which operation sorts the elements in a stream?

sorted()

order()

repeat()

shuffle()

Fill in the blank: To collect results into a List, you typically use collect(Collectors.toList()) — this is a ______ operation.

non-terminal

intermediate

terminal

short-circuit

True or False: Streams can modify the underlying source collection while processing.

true

false

only if synchronized

depends on the JVM

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Quiz-2

Test

Sobre esta actividad

Creada por

Descarga la versión para jugar en papel

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Test

Verbos irregulares en Inglés

Quiz-2Versión en línea

por Jeni Alex

Which Stream method returns an Optional when used on a stream?

Which operation is a terminal operation on streams?

Fill in the blank: The intermediate operation that transforms each element is called ________.

True or False: A Stream is lazy and only evaluates when a terminal operation is invoked.

Fill in the blank: flatMap is used to flatten a stream of streams into a single stream called a ________ stream.

Which method creates a stream from a Collection?

True or False: Parallel streams can utilize multiple CPU cores for better performance.

Which operation sorts the elements in a stream?

Fill in the blank: To collect results into a List, you typically use collect(Collectors.toList()) — this is a ______ operation.

True or False: Streams can modify the underlying source collection while processing.

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