Zazz IT Solutions Software Developer Interview Questions and Answers

Generator functions are functions that can be paused and resumed, allowing for lazy evaluation of data.

• Generator functions use the yield keyword to pause execution and return a value.

• They can be used to generate an infinite sequence of values.

• They are memory efficient as they only generate values when needed.

• Example: function* myGenerator() { yield 1; yield 2; yield 3; }

• Example: const infiniteGenerator = function*() { ...read more

Push notifications can be implemented in Android and iOS using Firebase Cloud Messaging (FCM) and Apple Push Notification service (APNs) respectively.

• For Android, integrate FCM SDK in the app and use FCM console to send notifications.

• For iOS, create an APNs certificate, configure the app to receive notifications, and use APNs to send notifications.

• Both platforms require handling of notification payload in the app to di...read more

I used React Native for my last app.

• Developed UI components using React Native

• Integrated APIs to fetch and display data

• Implemented Redux for state management

• Used Firebase for authentication and database

• Optimized app performance using React Native Debugger

Functional components are stateless and return UI elements based on input props, while non-functional components have state and can change UI based on user interaction.

• Functional components are simpler and easier to test than non-functional components.

• Non-functional components can have state and lifecycle methods, while functional components cannot.

• Examples of functional components include buttons, labels, and icons, w...read more

Spring is a framework for building Java applications, while Spring Boot is a tool for quickly creating Spring-based applications.

• Spring provides a comprehensive framework for building Java applications, while Spring Boot is a tool that simplifies and accelerates the process of creating Spring-based applications.

• Spring requires more configuration and setup, while Spring Boot provides a pre-configured environment that re...read more

A program to check if two strings are anagrams of each other.

• Create two character arrays from the input strings

• Sort the arrays

• Compare the sorted arrays to check if they are equal

Using Streams API to filter and map an array of strings

• Create a stream from the array using Arrays.stream()

• Use filter() to select elements that meet a certain condition

• Use map() to transform each element into a new value

• Use toArray() to convert the stream back into an array

REST API is a web service that uses HTTP requests to access and manipulate data.

• REST stands for Representational State Transfer

• It is an architectural style for building web services

• It uses HTTP methods like GET, POST, PUT, DELETE to perform operations on resources

• It is stateless and can be cached

• It returns data in various formats like JSON, XML, etc.