Data Structures and Algorithms

1. Array and Strings

• How do you find the missing number in a given integer array of 1 to 100?

• Write a function to reverse a string.

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

2. Linked Lists

• Explain the difference between a singly linked list and a doubly linked list.

• Write a function to detect a cycle in a linked list.

• How do you reverse a linked list?

3. Trees and Graphs

   • Explain the difference between a binary tree and a binary search tree.

   • Write a function to perform an inorder traversal of a binary tree.

   • How do you find the shortest path in a graph?

4. Sorting and Searching

• Explain the difference between quicksort and mergesort.

• Write a function to perform a binary search on a sorted array.

• How do you sort a list of integers in ascending order?

5. Dynamic Programming

• What is dynamic programming, and how does it differ from recursion?

• Write a function to solve the knapsack problem.

• Explain the concept of memoization with an example.

System Design

1. Scalability

• How would you design a URL shortening service like bit.ly?

• Design a system that can handle millions of requests per second.

• Explain the concept of load balancing and how it can be implemented.

2. Database Design

• How would you design a relational database for an e-commerce platform?

• Explain the differences between SQL and NoSQL databases.

• What is normalization, and why is it important in database design?

3. APIs and Microservices

• What is a RESTful API, and how does it work?

• How would you design a microservices architecture for a social media platform?

• Explain the concept of API versioning and why it is necessary.

Coding Problems

1. Simple Coding Challenges

• Write a function to check if a string is a palindrome.

• Implement a function that returns the Fibonacci sequence up to a given number.

• Write a program to find the factorial of a number.

2. Intermediate Coding Challenges

   • Write a function to merge two sorted linked lists.

   • Implement an algorithm to find the longest substring without repeating characters.

   • Write a function to perform matrix multiplication.

3. Advanced Coding Challenges

• Implement a trie (prefix tree) and write functions for insertion and search.

• Write a function to solve the traveling salesman problem using dynamic programming.

• Implement a LRU (Least Recently Used) cache.

Behavioral Questions

1. Teamwork and Collaboration

• Describe a time when you had to work closely with a difficult team member.

• How do you handle conflicts within a team?

• Give an example of how you contributed to a project's success.

2. Poblem-Solving and Decision Making

• Describe a challenging technical problem you faced and how you solved it.

• How do you prioritise tasks when working on multiple projects?

• Give an example of a time when you made a decision that was unpopular and how you handled it.

3. Adaptability and Learning

• How do you stay updated with the latest technology trends?

• Describe a situation where you had to learn a new technology quickly.

• How do you handle changes in project requirements?

Good luck with your interview!