PureSoftware Senior Software Engineer Interview Questions and Answers

LOD, Pie Chart, Dual Axis Chart in Tableau

• LOD (Level of Detail) is used to compute aggregations that are not at the level of detail of the visualization

• Pie Chart is used to show the proportion of different categories in a dataset

• Dual Axis Chart is used to compare two measures with different scales on the same chart

• To create LOD, use curly braces and specify the level of detail

• To create Pie Chart, drag the dimension to the Columns/Rows shelf and the measure to the Marks card

• To...read more

Swift & Objective-C are programming languages used for iOS development. Tableview in SwiftUI uses List view. RxSwift is a reactive programming framework. Optional & Generics are Swift features. Protocol Composition is combining multiple protocols.

• Swift & Objective-C are used for iOS development

• Tableview in SwiftUI uses List view

• RxSwift is a reactive programming framework for Swift

• Optional allows variables to have a 'no value' state

• Generics allow you to write flexible, reusabl...read more

Program to fetch and display data from API in React

• Use fetch or axios to make API calls in React

• Set up state to store the fetched data

• Render the data in the component using JSX

Some new features of React JS include Hooks, Context API, Suspense, and React.lazy.

• Introduction of Hooks for state and lifecycle management

• Context API for global state management

• Suspense for handling loading states in components

• React.lazy for code splitting and lazy loading components

Functional and class components are two types of components in React for building user interfaces.

• Functional components are simple functions that take props as input and return JSX elements.

• Class components are ES6 classes that extend React.Component and have a render method.

• Functional components are easier to read and test, while class components have more features like state and lifecycle methods.

• Example of functional component: const MyComponent = (props) =>

  {props.text}
  ;

• E...read more

HOC stands for Higher Order Component in React. It is a pattern where a function takes a component and returns a new component.

• HOC allows code reuse, logic abstraction, and props manipulation in React components.

• Example: WithAuthentication HOC can conditionally render a component based on user authentication status.

• Example: WithLoader HOC can display a loading spinner while fetching data for a component.