PwC Assurance Interview Questions and Answers

Q1. JavaScript Related Questions
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Q2. ReactJs Related Questions
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Q1. Reactjs Use Effects and UseRef
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Q2. JavaScript Closures,Map,CallBack
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Q1. Merge sort time complexity less
Ans. 
Merge sort has a time complexity of O(n log n) in the worst case scenario.
• Merge sort divides the array into two halves, sorts them recursively, and then merges them back together.

• The time complexity of merge sort is O(n log n) in the worst case scenario.

• For example, sorting an array of 8 elements would take 3 recursive calls to merge sort.
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Q2. Palindrome with react js to show on UI
Ans. 
Create a palindrome checker using React JS to display on the UI
• Create a input field for user to enter a string

• Use state to store the input string

• Create a function to check if the input string is a palindrome

• Display the result on the UI
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Javascript question on promise, callbacks, hosting

Q1. 1) what is ReactJs?
Ans. 
ReactJS is a JavaScript library for building user interfaces.
• Developed by Facebook

• Uses a virtual DOM for efficient updates

• Supports server-side rendering

• Can be used with other libraries and frameworks

• Uses JSX syntax to write HTML-like code in JavaScript

• Example: Facebook, Instagram, Airbnb, Netflix use ReactJS
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Q2. 2) What us UseState() In React
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UseState() is a hook in React that allows functional components to have state variables.
• useState() is used to declare state variables in functional components.

• It returns an array with two elements: the current state value and a function to update it.

• The function to update the state can be called with a new value or a function that takes the previous value as an argument.

• Example: const [count, setCount] = useState(0);

• Ex
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It ran for one hour covering topics like data, Logical Reasoning and Quantitative aptitude.

Q1. What are closures with examples ?
Ans. 
Closures are functions that have access to their own scope, as well as the scope in which they were defined.
• Closures allow functions to access variables from their outer function even after the outer function has finished executing.

• Closures are commonly used in event handlers and callbacks.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }
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Q2. How to get updated content on scroll on e-commerce app?
Ans. 
Use infinite scrolling to fetch new content as user scrolls down the page.
• Implement infinite scrolling to load more products as user scrolls down

• Make AJAX calls to fetch new content from the server

• Update the DOM with the new content dynamically
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Q1. 1. Introduction 2. PPE assertions 3.Ind as 115 steps 4.cash and cash equivalents 5.Risk based audit Few HR based question
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Q1. 1. No of attempts 2. Preferred location
Ans. 
I have attempted the exam twice and my preferred location is New York.
• I have attempted the exam twice and feel confident about my preparation.

• New York is my preferred location due to its proximity to my current residence.

• I have researched the exam centers in New York and feel comfortable with the facilities provided.
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Javascript array questions like palindrom and others with aptitude

Q1. Skill related technical questions
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Q2. How to share data in components react
Ans. 
Data can be shared between components in React using props, context, or state management libraries like Redux.
• Use props to pass data from parent to child components

• Use context to share data across multiple components without passing props manually

• Use state management libraries like Redux to manage global state and share data between components
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Q3. Prop drilling explain in react
Ans. 
Prop drilling is the process of passing data through multiple levels of components in React.
• Prop drilling occurs when a component needs to pass data to a deeply nested child component.

• It can lead to code that is hard to maintain and understand.

• One way to avoid prop drilling is by using Context API or Redux for state management.
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Q4. Redux flow explain
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Redux is a predictable state container for JavaScript apps.
• Redux stores the entire state of an application in a single immutable object.

• State changes are made by dispatching actions, which are plain JavaScript objects.

• Reducers specify how the application's state changes in response to actions.

• Redux flow: Action -> Reducer -> Store -> View
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Q1. Previous project discussion
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