Virinchi Technologies Senior Software Developer Interview Questions and Answers

Q1. What is lifecycle hook of Angular
Ans. 
Lifecycle hooks in Angular are methods that allow you to tap into the lifecycle of a component or directive.
• Lifecycle hooks include ngOnInit, ngOnChanges, ngDoCheck, ngOnDestroy, etc.

• ngOnInit is used to initialize data in a component after Angular has initialized the component.

• ngOnChanges is called when the input properties of a component change.

• ngDoCheck is used for detecting and acting on changes that Angular doesn't...read more
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Q1. Why functional interface when we have interface
Ans. 
Functional interfaces provide a single abstract method for functional programming in Java.
• Functional interfaces allow for lambda expressions and method references to be used as instances of the interface.

• Interfaces with multiple abstract methods cannot be used for lambda expressions.

• Example: java.util.function.Function is a functional interface with a single abstract method apply().
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Q2. Java 8 explain all features in short
Ans. 
Java 8 introduced new features like lambda expressions, streams, functional interfaces, and default methods.
• Lambda expressions: Allows writing concise code by enabling functional programming.

• Streams: Provides a way to work with sequences of elements efficiently.

• Functional interfaces: Interfaces with a single abstract method, used for lambda expressions.

• Default methods: Allows adding new methods to interfaces without br
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Q3. If one functional interface can extend another interface
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Yes, one functional interface can extend another interface in Java.
• Functional interfaces can extend other functional interfaces in Java.

• The child interface can have only one abstract method, but can inherit default methods from the parent interface.

• Example: interface Parent { void method1(); } interface Child extends Parent { void method2(); }
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Q1. Past experiences
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Q1. Basics of javascript and one live coding
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Q1. Basics of javascript and one live coding
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Q1. Past Experience
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Q1. Javascript basics, class and functional components, basic es6
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Q1. Promises, context api, redux and rest API
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Hello tell me about yourself

Q1. Find frequency of characters in any string
Ans. 
Use a hashmap to store character frequencies in a string.
• Iterate through the string and update the hashmap with character frequencies.

• Return the hashmap with character frequencies.
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Q2. Difference between webseries and Api
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Webseries is a series of videos released online, while API is a set of rules and protocols for building and interacting with software applications.
• Webseries is a collection of videos released online, often in episodes or seasons.

• API (Application Programming Interface) is a set of rules and protocols that allows different software applications to communicate with each other.

• Webseries are typically consumed by viewers fo...read more
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