Cisco vs Siemens Interview Questions
Cisco lists 87 LeetCode interview questions while Siemens lists 25. They share 10 problems — 11% of Cisco's bank and 40% of Siemens's. Focus on the overlap first, then drill into 77 Cisco-only and 15 Siemens-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 10 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cisco and Siemens.
Step 2 — Company-specific depth: Add Cisco-specific problems like House Robber, Predict the Winner, Lucky Numbers in a Matrix and Siemens-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Siemens skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
10 Shared Questions
High-priority problems to practice for both Cisco and Siemens.
| Problem | Difficulty |
|---|---|
| Longest Palindromic Substring | Medium |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Two Sum | Easy |
| Valid Parentheses | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Number of Islands | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
Unique to Cisco (77)
Problems in Cisco's list that do not appear at Siemens.
| Problem | Difficulty |
|---|---|
| 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 |
| Word Search II | Hard |
Unique to Siemens (15)
Problems in Siemens's list that do not appear at Cisco.
Frequently Asked Questions
How many LeetCode questions do Cisco and Siemens share?
Cisco and Siemens share 10 LeetCode interview questions. 77 problems appear only in Cisco's list and 15 appear only in Siemens's list.
What topics overlap most between Cisco and Siemens?
The most common shared topics between Cisco and Siemens are Array (7 shared questions), Hash Table (4 shared questions), String (3 shared questions), Sorting (3 shared questions), Two Pointers (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cisco or Siemens?
Cisco has 24 Easy, 50 Medium, and 13 Hard questions. Siemens has 8 Easy, 13 Medium, and 4 Hard questions. Siemens has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cisco and Siemens?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 Cisco-specific and 15 Siemens-specific questions to round out your prep.