Apple Software Developer Intern Interview Questions and Answers

Round duration - 90 Minutes
Round difficulty - Medium

It was in the morning at our institute. There were technical and aptitude problems.

Q1. 
Star Pattern Generation
Develop a function to print star patterns based on the given number of rows 'N'. Each row in the pattern should follow the format demonstrated in the example.
The picture illustra...read more
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Round duration - 30 Minutes
Round difficulty - Medium

It was actually a Techno HR round. I was asked some technical questions about OS, OOPS, COMPUTER NETWORKING, WEB DEVELOPMENT. He went through my whole resume, asked about all the projects and past working experiences. The interviewer was really good, we talked about so many other topics, from Women empowerment to Water Crises. I felt really confident while speaking because he made me so comfortable.

Q1. 
Selection Sort Algorithm
Selection sort is a sorting technique that works by repeatedly finding the minimum element (considering ascending order) from the unsorted part and placing it at the beginning of ...read more
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Round duration - 60 minutes
Round difficulty - Easy

The round was taken on Cocubes platform with video enabled . The time I chose was 3:00 P.M.

Q1. 
Maximum Number from Linked List Problem Statement
Given a linked list where each node contains a single digit, your task is to construct the largest possible number using these digits.
Objective:
Print ...read more
Ans. 
Given a linked list of single digits, construct the largest number possible.
• Traverse the linked list to extract the digits

• Sort the digits in descending order

• Concatenate the sorted digits to form the maximum number
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Round duration - 60 Minutes
Round difficulty - Medium

The coding problems were medium and it was held online on Cocubes at 4:00 PM

Q1. 
Maximum Sum Path from Leaf to Root
Given a binary tree with 'N' nodes, identify the path from a leaf node to the root node that has the maximum sum among all root-to-leaf paths.
Example:
All the possibl...read more
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Q2. 
Bipartite Graph Check
Determine if a given graph is bipartite. A graph is considered bipartite if its vertices can be divided into two disjoint sets, 'U' and 'V', such that every edge connects a vertex in...read more
Ans. 
Check if a given graph is bipartite by dividing its vertices into two disjoint sets.
• Create two sets 'U' and 'V' to divide the vertices

• Check if every edge connects vertices from different sets

• Use graph traversal algorithms like BFS or DFS to determine bipartiteness
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Round duration - 60 minutes
Round difficulty - Medium

This round was a face to face round held on Cisco webex.
This round was completely on DS-Algo and OOPS.
The level of the questions asked was from medium level to hard level.

Q1. 
Stack using Two Queues Problem Statement
Develop a Stack Data Structure to store integer values using two Queues internally.
Your stack implementation should provide these public functions:
Explanation:
...read more
Ans. 
Implement a stack using two queues to store integer values with specified functions.
• Use two queues to simulate stack operations efficiently.

• Maintain one queue for storing elements and another for temporary storage during push operation.

• Ensure to handle edge cases like empty stack and maximum size limit.

• Example: Push operation involves transferring elements from one queue to another before adding the new element.
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Q2. 
Remove Duplicates from String Problem Statement
You are provided a string STR of length N, consisting solely of lowercase English letters.
Your task is to remove all duplicate occurrences of characters i...read more
Ans. 
Remove duplicate occurrences of characters in a given string.
• Use a hash set to keep track of characters seen so far.

• Iterate through the string and add non-duplicate characters to a new string.

• Return the new string as the result.
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Q3. 
Palindrome Linked List Problem Statement
You are provided with a singly linked list of integers. Your task is to determine whether the given singly linked list is a palindrome. Return true if it is a pali...read more
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Q4. 
Word Search Problem Statement
Given a two-dimensional grid with 'N' rows and 'M' columns consisting of uppercase characters, and a string 'WORD', your task is to determine the number of times the word app...read more
Ans. 
Count the number of occurrences of a given word in a two-dimensional grid of characters.
• Iterate through each cell in the grid and check if the word can be formed starting from that cell in any of the eight directions.

• Use backtracking to explore all possible paths while matching the characters of the word.

• Keep track of visited cells to avoid revisiting the same cell in the same path.

• Return the count of occurrences of th...read more
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Q5. 
Merge Sort Problem Statement
You are given a sequence of numbers, ARR. Your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.
Explanation:
The Merge Sort...read more
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Round duration - 180 Minutes
Round difficulty - Medium

1 coding question, 3 hours to solve, 50 test cases.
Problem level - medium
Platform ide - okayish

Q1. 
Water Supply Optimization Problem
Given N houses in a village, determine the minimum cost to supply water to all houses either by building wells in the houses or by connecting them with pipes.
Explanatio...read more
Ans. 
Determine the minimum cost to supply water to all houses in a village by building wells or connecting them with pipes.
• Iterate through all possible connections and choose the minimum cost between building a well or connecting two houses with a pipe.

• Use a minimum spanning tree algorithm like Kruskal's or Prim's to find the optimal cost.

• Consider the cost of building wells and connecting pipes to minimize the total cost.

• Ex...read more
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Round duration - 40 minutes
Round difficulty - Medium

Mixed round, Problem solving, cpp fundamentals, OOP, resume

Round duration - 24 hours
Round difficulty - Easy

It was a hackathon we were given a problem statement and we had to solve that within 2 days. There were team of 4 people.

Q1. You had to build a chatbot. Can you describe the design process and the key considerations you took into account?
Ans. 
The design process for building a chatbot involves defining user goals, choosing a platform, designing conversation flow, implementing natural language processing, and testing for accuracy.
• Define user goals and objectives for the chatbot

• Choose a platform or framework for building the chatbot (e.g. Dialogflow, Microsoft Bot Framework)

• Design the conversation flow and user interactions

• Implement natural language processing...read more
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Round duration - 15 minutes
Round difficulty - Easy

HR round