Cisco vs Zeta Interview Questions
Cisco lists 87 LeetCode interview questions while Zeta lists 30. They share 9 problems — 10% of Cisco's bank and 30% of Zeta's. Focus on the overlap first, then drill into 78 Cisco-only and 21 Zeta-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 9 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cisco and Zeta.
Step 2 — Company-specific depth: Add Cisco-specific problems like Longest Palindromic Substring, Predict the Winner, Lucky Numbers in a Matrix and Zeta-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Zeta skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
9 Shared Questions
High-priority problems to practice for both Cisco and Zeta.
| Problem | Difficulty |
|---|---|
| House Robber | Medium |
| Merge Intervals | Medium |
| Maximum Subarray | Medium |
| Trapping Rain Water | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Remove Boxes | Hard |
| Insert Delete GetRandom O(1) | Medium |
| Remove K Digits | Medium |
| Sliding Window Maximum | Hard |
Unique to Cisco (78)
Problems in Cisco's list that do not appear at Zeta.
| Problem | Difficulty |
|---|---|
| Longest Palindromic Substring | Medium |
| Predict the Winner | Medium |
| Lucky Numbers in a Matrix | Easy |
| Rotate Image | Medium |
| Spiral Matrix | Medium |
| Fizz Buzz | Easy |
| LRU Cache | Medium |
| 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 Zeta (21)
Problems in Zeta's list that do not appear at Cisco.
| Problem | Difficulty |
|---|---|
| Apply Operations to Make Two Strings Equal | Medium |
| Split Array Largest Sum | Hard |
| Minimum Window Substring | Hard |
| Capacity To Ship Packages Within D Days | Medium |
| Palindrome Partitioning II | Hard |
| Task Scheduler | Medium |
| Next Greater Element II | Medium |
| Reverse Nodes in k-Group | Hard |
| Maximal Rectangle | Hard |
| Count Univalue Subtrees | Medium |
| Heaters | Medium |
| Find All Possible Recipes from Given Supplies | Medium |
Frequently Asked Questions
How many LeetCode questions do Cisco and Zeta share?
Cisco and Zeta share 9 LeetCode interview questions. 78 problems appear only in Cisco's list and 21 appear only in Zeta's list.
What topics overlap most between Cisco and Zeta?
The most common shared topics between Cisco and Zeta are Array (7 shared questions), Dynamic Programming (4 shared questions), Stack (2 shared questions), Monotonic Stack (2 shared questions), Hash Table (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cisco or Zeta?
Cisco has 24 Easy, 50 Medium, and 13 Hard questions. Zeta has 0 Easy, 20 Medium, and 10 Hard questions. Zeta has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cisco and Zeta?
Start with the 9 shared problems since they cover what both companies ask most often. Then add 20 Cisco-specific and 20 Zeta-specific questions to round out your prep.