Ernst & Young Unity 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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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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Q1. Questions based on Java , C++ , OOPs, cloud computing, one coding question, regarding previous projects, some behavioural questions.
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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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Q1. Question in strings were asked
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Q1. ServiceNow Business rule types
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Q1. What is mvc lify cyle with example?
Ans. 
MVC lifecycle is the sequence of events that occur during the execution of a Model-View-Controller application.
• 1. User interacts with the View triggering a request

• 2. Controller receives the request and processes it

• 3. Controller updates the Model with new data

• 4. Model notifies the View about the changes

• 5. View retrieves the updated data from the Model

• 6. View renders the updated data for the user
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Q2. What is interface,abstraction,polymorphism?
Ans. 
Interface, abstraction, and polymorphism are key concepts in object-oriented programming.
• Interface: A contract that defines a set of methods that a class must implement.

• Abstraction: The process of hiding the implementation details and exposing only the essential features of an object.

• Polymorphism: The ability of an object to take on many forms, allowing objects of different classes to be treated as objects of a common
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Q3. What is const and readonly ?
Ans. 
const and readonly are keywords used in programming to define variables that cannot be modified.
• const is used to declare a constant variable that cannot be changed after initialization

• readonly is used to declare a variable that can only be assigned a value at the time of declaration or in the constructor

• const variables are implicitly static and must be initialized with a constant value

• readonly variables can have differ
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Q4. What is virtual and override keyword?
Ans. 
The virtual keyword is used to allow a method to be overridden in a derived class. The override keyword is used to indicate that a method is intended to override a base class method.
• The virtual keyword is used in the base class to define a method that can be overridden in a derived class.

• The override keyword is used in the derived class to indicate that a method is intended to override a base class method.

• The virtual k...read more
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