Flashcards

Quick study sessions to strengthen memory and retain key concepts.

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Java: Non-Blocking I/O (Event Loops)

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What problem arises from blocking operations within a non-blocking event loop?

It reduces the system's responsiveness and scalability. Blocking operations in a non-blocking event loop can lead to performance…

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Java: Non-Blocking I/O (Event Loops)

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How does the 'flatMap' operator work differently from 'map' in a functional pipeline?

'flatMap' transforms each element into a Publisher, 'map' transforms each element to a value. In a reactive stream,…

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Java: Non-Blocking I/O (Event Loops)

Front

Why is it crucial to decouple the HTTP connection from the execution thread in reactive systems?

To enhance responsiveness and scalability. Decoupling allows an HTTP request to be handled without dedicating a thread to…

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Java: Non-Blocking I/O (Event Loops)

Front

Why does a 'Publisher' in Reactive Streams matter in this design?

A Publisher emits data to a Subscriber. Frame the concept in practical terms so you can explain it…

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Java: Non-Blocking I/O (Event Loops)

Front

How does Spring WebFlux use a non-blocking event loop for scalability?

WebFlux handles requests using a small number of threads. Spring WebFlux relies on non-blocking event loops, where a…

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Java: Non-Blocking I/O (Event Loops)

Front

What does 'non-blocking' mean in reactive programming?

Non-blocking means operations do not obstruct the execution flow. In reactive programming, non-blocking means that operations, such as…

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Java: Non-Blocking I/O (Event Loops)

Front

How does WebFlux handle database queries non-blockingly?

By delegating queries to separate threads or using reactive drivers. In WebFlux, database queries are handled in a…

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Java: Non-Blocking I/O (Event Loops)

Front

What signifies a non-blocking I/O operation?

Operations that don't wait for completion before returning. Non-blocking I/O operations allow an application to initiate an I/O…

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Java: Non-Blocking I/O (Event Loops)

Front

Why can not implementing proper backpressure become a real problem?

It can lead to memory overflow and application crashes. Without proper backpressure, a Subscriber might be overwhelmed with…

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Java: Non-Blocking I/O (Event Loops)

Front

How does map differ from flatMap in Project Reactor?

map transforms data; flatMap transforms and flattens data streams. The map function is used to transform each item…

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