Cisco vs Snapchat Interview Questions
Cisco lists 87 LeetCode interview questions while Snapchat lists 99. They share 19 problems — 22% of Cisco's bank and 19% of Snapchat's. Focus on the overlap first, then drill into 68 Cisco-only and 80 Snapchat-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 19 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cisco and Snapchat.
Step 2 — Company-specific depth: Add Cisco-specific problems like Longest Palindromic Substring, House Robber, Predict the Winner and Snapchat-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Snapchat skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
19 Shared Questions
High-priority problems to practice for both Cisco and Snapchat.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Word Search II | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Letter Combinations of a Phone Number | Medium |
| Number of Islands | Medium |
| Reverse Linked List | Easy |
| Meeting Rooms II | Medium |
| Word Search | Medium |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Reverse Words in a String | Medium |
| Design Browser History | Medium |
| Product of Array Except Self | Medium |
| Remove K Digits | Medium |
| Min Stack | Medium |
| Edit Distance | Medium |
Unique to Cisco (68)
Problems in Cisco's list that do not appear at Snapchat.
| Problem | Difficulty |
|---|---|
| Longest Palindromic Substring | Medium |
| House Robber | Medium |
| Predict the Winner | Medium |
| Lucky Numbers in a Matrix | Easy |
| Rotate Image | Medium |
| Spiral Matrix | Medium |
| Fizz Buzz | Easy |
| Snakes and Ladders | Medium |
| Number of Valid Words in a Sentence | Easy |
| Maximum Difference Between Increasing Elements | Easy |
| Find Third Transaction | Medium |
| Implement Router | Medium |
Unique to Snapchat (80)
Problems in Snapchat's list that do not appear at Cisco.
| Problem | Difficulty |
|---|---|
| Valid Sudoku | Medium |
| Sudoku Solver | Hard |
| Combination Sum | Medium |
| Combination Sum II | Medium |
| Wildcard Matching | Hard |
| Minimum Window Substring | Hard |
| Unique Binary Search Trees | Medium |
| Word Ladder | Hard |
| Word Break II | Hard |
| One Edit Distance | Medium |
| Basic Calculator II | Medium |
| Alien Dictionary | Hard |
Frequently Asked Questions
How many LeetCode questions do Cisco and Snapchat share?
Cisco and Snapchat share 19 LeetCode interview questions. 68 problems appear only in Cisco's list and 80 appear only in Snapchat's list.
What topics overlap most between Cisco and Snapchat?
The most common shared topics between Cisco and Snapchat are Array (11 shared questions), String (8 shared questions), Hash Table (6 shared questions), Design (4 shared questions), Sorting (4 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cisco or Snapchat?
Cisco has 24 Easy, 50 Medium, and 13 Hard questions. Snapchat has 6 Easy, 62 Medium, and 31 Hard questions. Snapchat has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cisco and Snapchat?
Start with the 19 shared problems since they cover what both companies ask most often. Then add 20 Cisco-specific and 20 Snapchat-specific questions to round out your prep.