FAANG Interview Questions (Fresher)
Interview Zone: FAANG Interview Preparation
Top 30+ FAANG Interview Questions for Freshers
If you aim to land a job at a FAANG company, using smart FAANG interview questions for freshers to prepare will give you a real advantage. These global tech giants—Facebook (Meta), Apple, Amazon, Netflix, and Google—expect strong fundamentals, so this guide presents 30+ frequently asked questions divided into easy, medium, and advanced levels. Also, it covers coding, algorithmic thinking, system design basics, and behavioral skills.
Moreover, FAANG companies rely heavily on structured interviews to evaluate technical knowledge, problem-solving, and cultural fit. Therefore, practicing these FAANG interview questions for freshers will build your confidence. By mastering this material, you’ll demonstrate that you think efficiently, communicate clearly, and fit well into fast-paced, collaborative environments.
Basic FAANG Interview Questions for Freshers
1. Reverse a string.
For instance, write a function that takes “hello” and returns “olleh”. Discuss time complexity and consider Python’s slicing or JavaScript’s split–reverse–join.
2. FizzBuzz problem.
Loop through numbers 1 to 100. Print “Fizz” for multiples of 3, “Buzz” for multiples of 5, “FizzBuzz” for both, else print the number.
3. Check for palindrome.
Determine whether a string reads the same backward. Then, discuss edge cases like capitalization and ignoring spaces.
4. Find max element in an array.
Scan the array once, keeping track of the maximum. This shows understanding of linear algorithms and simple iteration.
5. Swap two numbers without a temp variable.
You can use arithmetic or bitwise XOR operations to swap values without extra storage.
6. Compute factorial.
Offer both recursive and iterative solutions, then discuss pros and cons of each approach.
7. Check even or odd.
Use modulo `% 2` or bitwise AND to determine whether a number is even or odd.
8. Print Fibonacci sequence.
Show both looping and recursive methods. Then, optimize further using memoization.
9. Count vowels in a string.
Loop through each character and compare against a set of vowels. Also discuss case-insensitive comparison.
10. Merge two sorted arrays.
Use two pointers to merge in O(n+m) time while keeping the resulting array sorted.
Medium FAANG Interview Questions for Freshers
11. Two Sum problem.
Find indices where two array elements add up to a target. Optimize by using a hash map to achieve O(n) time complexity.
12. Detect a cycle in a linked list.
Use Floyd’s Tortoise and Hare algorithm to detect cycles in O(n) time and O(1) space.
13. Merge two sorted linked lists.
Iterate both lists and construct a new merged list by comparing node values.
14. Binary search in a sorted array.
Implement divide and conquer by checking midpoints and shrinking the search space logarithmically.
15. Validate parentheses string.
Use a stack to push opening brackets and pop on matching closing ones, ensuring the string remains balanced.
16. Longest common prefix.
Compare characters of each string index by index, stopping when they differ or reach the smallest string’s length.
17. Find duplicates in an array.
Use a set to track seen items and detect duplicates when an element already exists in the set.
18. Level-order traversal of a binary tree.
Apply BFS using a queue to visit nodes level by level and collect their values.
19. Validate a BST.
Use recursion to ensure each node falls within a valid min/max range for a binary search tree.
20. Rotate an array by k steps.
Use reversal algorithm: reverse the whole array, then reverse the first k and the rest separately to rotate in-place.
Advanced Questions for Freshers
21. Longest substring without repeating characters.
Use sliding window with hash map to track indices and move the start pointer before repeats. Time: O(n).
22. Find median of two sorted arrays.
Use binary search to partition arrays properly and compute the median in O(log(min(m,n))) time.
23. Clone a graph.
Use BFS/DFS plus a hash map to copy each node and its neighbors.
24. LRU Cache implementation.
Combine a hash map and doubly-linked list to ensure O(1) access and eviction of least recently used items.
25. Serialize/deserialize a binary tree.
Use preorder traversal with markers, or BFS with null markers, and then reconstruct the tree accordingly.
26. Dynamic Programming: Climbing stairs.
Use DP to note that ways(n) = ways(n-1) + ways(n-2). Then discuss optimizations like constant space.
27. Word ladder (shortest transformation).
Use BFS on words graph, where edges connect words differing by one letter, to find the shortest path.
28. Number of islands in grid.
Use flood fill (DFS/BFS) to count each island and mark visited cells. Time ~ O(m*n).
29. System design basics: Design TinyURL.
Discuss API endpoints, hash functions, database schema, and scaling concerns such as concurrency and storage.
30. System design basics: Design chat service.
Talk about message queues, servers, data models, real-time protocols (e.g., WebSockets), and scalability.
31. Behavioral: Describe a time you faced conflict on a team.
Use the STAR method to describe conflict, your role, actions, and outcome—highlight collaboration and communication skills that FAANG firms value.
32. Behavioral: How do you handle feedback?
Show that you welcome feedback, implement suggestions, and grow from critique—demonstrating a growth mindset.
Final Note
In summary, these FAANG interview questions for freshers cover coding, algorithms, system design basics, and behavioral rounds. Therefore, practice consistently across all areas and review your solutions thoroughly. Additionally, explain your approach clearly in interviews, write clean code, and demonstrate problem-solving with clarity.
