Scala & ZIO Quiz - Functional Scala 2022

The ZIO#ignore method allows you to ignore values:

• In the success channel

• In the typed error channel

• In both success and typed error channels

In ZIO, the default thread pool:

• Is intended for running async computations, and has a number of threads equal to the number of cores of your machine

• Is intended for running blocking computations, and has a number of threads equal to the number of cores of your machine

• Is intended for running blocking computations, and has an unlimited number of threads

• Is intended for running async computations, and has an unlimited number of threads

In ZIO 2.0, the ZManaged data-type was completely removed, what’s the replacement for it?

• ZStream

• ZSTM

• ZIO

When running the following: leftEffect zipPar rightEffect:

• If either side fails, then the other one automatically fails

• If either side fails, then the other one gets automatically interrupted

• If either side fails, then the other one keeps running until its execution gets completed

When running, the following: leftEffect race rightEffect:

• If either side fails, then the other one automatically fails

• If either side fails, then the other one gets automatically interrupted

• If either side fails, then the other one keeps running until its execution gets completed

A Ref[A] models a purely functional mutable reference to a value of type A, in which we can store:

• Immutable data

• Mutable data

• Either of them

A Promise[E, A] in ZIO:

• Can start with a non-empty value, and can be set multiple times

• Always starts with an empty value, and can be set just once

• Always starts with an empty value, and can be set multiple times

• Can start with a non-empty value, and can be set just one

In ZIO 2.0, the replacement of the old Has data-type is:

• ZLayer

• ZEnvironment

• Ref

In ZIO 2.0, if you want to generate a Mermaid diagram of your application’s dependency graph, you can do it like:

• 
• 
• 

A ZIOAspect is, in essence:

• A function from a ZLayer to ZIO effect

• A function from a ZEnvironment to a ZIO effect

• A function from a ZIO effect to a new ZIO effect