Deloitte Full Stack 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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Basic aptitude questions. Could be done easily if practiced enough

Q1. Introduce yourself
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Q2. Array searching
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Q1. Write a java program to sort an array
Ans. 
Java program to sort an array of strings
• Use Arrays.sort() method to sort the array of strings

• Import java.util.Arrays package

• Example: String[] arr = {"apple", "banana", "orange"}; Arrays.sort(arr);
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Q2. Collections in java and springboot
Ans. 
Collections in Java and Spring Boot are used to store and manipulate groups of objects.
• Collections in Java are used to store multiple objects in a single unit.

• Spring Boot provides support for managing collections through various data structures like List, Set, Map, etc.

• Collections in Java and Spring Boot help in organizing and manipulating data efficiently.

• Example: List<String> names = new ArrayList<>();
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Simple coding test with easy to medium level questions

Q1. What motivated you to get into this field ?
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Q2. What are your long term goals
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Very Basic Questions
around 50 question
Only the top Candidates will be move to next round

2 basic level coding promblems
can write in any language

Q1. Tell me about yourself.
Ans. 
I am a software developer with experience in various programming languages and a passion for creating innovative solutions.
• Experienced in Java, C++, and Python

• Developed a mobile app using React Native

• Worked on a team to build a web application using AngularJS

• Strong problem-solving and analytical skills
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Q2. What do you Know about EY
Ans. 
EY is a multinational professional services firm specializing in assurance, tax, consulting, and advisory services.
• EY is one of the Big Four accounting firms.

• It has a global presence with offices in over 150 countries.

• The company offers services in areas such as auditing, tax planning, risk management, and technology consulting.

• EY is known for its expertise in financial services, healthcare, technology, and other indus...read more
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Q3. Do you have plans for higher Education
Ans. 
Yes, I have plans for higher education.
• I am currently pursuing a Bachelor's degree in Computer Science and plan to continue my education with a Master's degree.

• I believe that higher education will provide me with a deeper understanding of software development principles and help me stay updated with the latest technologies.

• I am considering specialized courses or certifications in areas such as artificial intelligence o...read more
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Q4. Which programming language do you know
Ans. 
I know multiple programming languages including Java, Python, and C++.
• Proficient in Java, Python, and C++

• Familiar with JavaScript, HTML, and CSS

• Experience with SQL and NoSQL databases

• Comfortable with object-oriented programming and design patterns
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Q5. Tell About your Project Experience
Ans. 
I have worked on various projects involving web development, mobile app development, and database management.
• Developed a web application using HTML, CSS, and JavaScript for a client in the e-commerce industry.

• Created a mobile app using React Native for a startup in the travel sector.

• Managed and optimized a MySQL database for a healthcare organization.

• Implemented RESTful APIs using Node.js and Express for a social media
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Q1. Coding problems will asked
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