PwC React Js Frontend Developer Interview Questions and Answers

Round duration - 90 minutes
Round difficulty - Medium

This test consists of two coding questions and some MCQ regarding computer fundamentals.

Q1. 
Kevin and His Cards Problem Statement
Kevin has two packs of cards. The first pack contains N cards, and the second contains M cards. Each card has an integer written on it. Determine two results: the tot...read more
Ans. 
Find total distinct card types and common card types between two packs of cards.
• Create a set to store distinct card types when combining both packs.

• Iterate through each pack and add card types to the set.

• Find the intersection of card types between the two packs to get common card types.
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Q2. 
Allocate Books Problem Statement
Given an array of integers arr, where arr[i] represents the number of pages in the i-th book, and an integer m representing the number of students, allocate all the books ...read more
Ans. 
Allocate books to students in a way that minimizes the maximum number of pages assigned to a student.
• Iterate through all possible allocations of books to students.

• Calculate the maximum number of pages assigned to a student for each allocation.

• Return the minimum of these maximums as the result.
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Round duration - 40 minutes
Round difficulty - Easy

It was a technical round that is based on DSA and computer fundamentals.

Q1. 
Reverse Linked List Problem Statement
Given a singly linked list of integers, return the head of the reversed linked list.
Example:
Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
Reversed link...read more
Ans. 
Reverse a singly linked list of integers and return the head of the reversed linked list.
• Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.

• Use three pointers - prev, current, and next to reverse the linked list in O(N) time and O(1) space complexity.

• Update the head of the reversed linked list as the last node encountered during the reversal process.
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Q2. 
Sort 0 1 2 Problem Statement
Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.
Input:
The first line contains an integer 'T' representing the n...read more
Ans. 
Sort an array of 0s, 1s, and 2s in linear time complexity.
• Use three pointers to keep track of 0s, 1s, and 2s while traversing the array.

• Swap elements based on the values encountered to sort the array in-place.

• Time complexity should be O(N) and space complexity should be O(1).
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Q1. Questions based on Java , C++ , OOPs, cloud computing, one coding question, regarding previous projects, some behavioural questions.
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Clear basic programming fundamentals

Q1. All basic to advance concepts oops, SDLC, C3, asp.net, angular etc.
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Q1. When have you had a conflict with someone.
Ans. 
I had a conflict with a team member over project priorities.
• Miscommunication led to conflicting priorities

• Discussed the issue openly and found a compromise

• Learned the importance of clear communication in team projects
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Q2. Tell me you greatest project
Ans. 
Developed a web-based project management tool for tracking tasks and deadlines
• Used React for front-end development

• Implemented user authentication and authorization using JWT tokens

• Utilized Node.js and Express for back-end development

• Integrated MongoDB for database storage
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Challenging questions in mathematics.

A constructive discussion about the significance of various topics and additional aspects.

1 20 mark easy ques and 1 50 mark med ques, time : 1h 30 mins i guess

Q1. Common elemnts two list , oops
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Q2. Case study and oops sql
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Hackerrank online assessment

Case study with a little bit of math for scenario based questions

2 questions of coding with a live interviewer

Behavioral and coding with a senior engineer

Q1. How do you handle conflicts
Ans. 
I handle conflicts by actively listening, seeking common ground, and finding mutually beneficial solutions.
• Actively listen to all parties involved to understand their perspectives

• Seek common ground and areas of agreement to build upon

• Find mutually beneficial solutions that address the concerns of all parties

• Communicate openly and transparently to resolve conflicts effectively
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Q2. What was the most challenging problem you had to solve so far
Ans. 
Developing a real-time data synchronization system across multiple servers
• Designing a scalable architecture to handle high volume of data

• Implementing efficient algorithms for data synchronization

• Handling conflicts and ensuring data consistency

• Testing the system under various load conditions
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I cleared the aptitude and coding tests, followed by the communication assessment. After successfully passing both rounds, I was shortlisted for the interviews.

Q1. Tell me about yourself
Ans. 
I am a passionate software developer with experience in building web applications using various technologies.
• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js and databases like MongoDB and MySQL

• Familiar with version control systems like Git and project management tools like Jira
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Q2. Projects and what kind of person I am. Background check.
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Q1. Projects, resume
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Q2. Cloud computing and cyber security questions.
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Q1. Managerial round both technical and HR type questions where asked.
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Q2. Scenario based questions
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