Exam (elaborations)
Javascript - Ngrx Interview Questions And Answers Latest Update
- Course
- Angular
- Institution
- Stanford University
Javascript - Ngrx Interview Questions And Answers Latest Update
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Solution 2024/2025Pepper
Javascript - Ngrx Interview Questions And
Answers Latest Update
What is NgRx?
NgRx is a framework for building reactive applications in Angular. NgRx
provides state management, isolation of side effects, entity collection
management, router bindings, code generation, and developer tools that
enhance developers' experience when building many different types of
applications.
What are the benefits of using Store (NgRx) in Angular?
Centralized, Immutable State — All relevant application state exists in one
location. This makes it easier to track down problems, as a snapshot of the
state at the time of an error can provide important insight and make it easy
to recreate issues.
Performance — Since the state is centralized at the top of your application,
, Solution 2024/2025
Pepper
data updates can flow down through your components relying on slices of
the store.
Testability -All state updates are handled in reducers, which are pure
functions. Pure functions are elementary to test, as it is simply input in, and
assert against output.
What are Reducers in NgRx?
Reducers in NgRx are responsible for handling transitions from one state to
the next state in your application. Reducer functions handle these
transitions by determining which actions to handle based on the action's
type. Reducers are pure functions that are the only ones that can change
state. They are not really changing the state but making a copy of the
existing state and changing one or more properties in the new state.
What is the difference between NgRx and RxJs?
NgRx is a Redux implementation using RxJs. RxJs is for handling complex
asynchronous work like taking communication between client and server.
NgRx is for optimally storing data in the client and recalling them from all
over the application, usually.
What are the Actions in NgRx?
Actions are one of the main building blocks in NgRx. Actions express unique
events that happen throughout your application. Actions are objects that
extend the NgRx Action class with a 'type' property. They have an optional
'payload' property (naming is up to you but the standard is to name it
'payload') for sending in data to the effect/reducer and are dispatched by
the store to run an effect or change state in a reducer.
What are States in NgRx?
State is a single, immutable data structure. Actions describe state changes.
Pure functions called reducers take the previous state and the next action to
compute the new state. State accessed with the Store, an observable of
state, and an observer of actions.
Can you explain the different parts of a state tree in NgRx?
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