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This post lists some subjective questions and answers related to Signals in Angular. This collection contains some potential interview questions that may be helpful if you are preparing for a Frontend Engineering job interview specific to Angular framework. Check out Angular Interview Series – Topic Wise Q&A.
1. What are Angular signals?
Angular signals are a reactive programming feature that allows components to respond to changes in state or data more efficiently, improving performance and readability.
2. How do signals differ from observables?
Signals provide a simpler, more direct way to manage state changes compared to observables, which require subscriptions and can introduce more complexity.
3. How do you create a signal in Angular?
You can create a signal using the signal() function, like so: const mySignal = signal(initialValue);.
4. How do you read a signal’s value?
To read the current value of a signal, simply call it like a function: const value = mySignal();.
5. How do you update a signal’s value?
You can update a signal’s value using its set() method: mySignal.set(newValue);.
6. Can you combine signals?
Yes, you can create derived signals by combining other signals, allowing you to react to changes in multiple sources.
7. What is the benefit of using signals in Angular?
Signals enhance performance by reducing unnecessary re-renders and providing a clearer model of state changes, leading to better maintainability.
8. Are signals suitable for all types of applications?
Signals are particularly useful in applications with complex state management but may not be necessary for simpler applications.
9. How do you integrate signals with Angular components?
We can use signals directly in the component’s template and methods, making them reactive to changes in state.
10. What are the potential downsides of using signals?
Signals may introduce a learning curve for developers familiar with observables and might not fit every use case in Angular applications.
These are a few questionnaires specific to Angular Components. I will be adding more questions and answers to this post. To know more details please refer to the Official documentation on Angular Signals.