Cisco vs Deloitte Interview Questions
Cisco lists 87 LeetCode interview questions while Deloitte lists 43. They share 18 problems — 21% of Cisco's bank and 42% of Deloitte's. Focus on the overlap first, then drill into 69 Cisco-only and 25 Deloitte-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 18 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cisco and Deloitte.
Step 2 — Company-specific depth: Add Cisco-specific problems like House Robber, Predict the Winner, Lucky Numbers in a Matrix and Deloitte-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Cisco skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
18 Shared Questions
High-priority problems to practice for both Cisco and Deloitte.
| Problem | Difficulty |
|---|---|
| Longest Palindromic Substring | Medium |
| Merge Intervals | Medium |
| Maximum Subarray | Medium |
| Two Sum | Easy |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| 3Sum | Medium |
| Longest Consecutive Sequence | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Group Anagrams | Medium |
| Valid Palindrome | Easy |
| Merge k Sorted Lists | Hard |
| Subarray Sum Equals K | Medium |
| Remove K Digits | Medium |
| Climbing Stairs | Easy |
| Edit Distance | Medium |
| Rising Temperature | Easy |
Unique to Cisco (69)
Problems in Cisco's list that do not appear at Deloitte.
| Problem | Difficulty |
|---|---|
| House Robber | 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 Deloitte (25)
Problems in Deloitte's list that do not appear at Cisco.
| Problem | Difficulty |
|---|---|
| Change Null Values in a Table to the Previous Value | Medium |
| Second Highest Salary | Medium |
| Longest Common Prefix | Easy |
| Container With Most Water | Medium |
| Palindrome Number | Easy |
| Add Binary | Easy |
| Managers with at Least 5 Direct Reports | Medium |
| Minimum Time to Repair Cars | Medium |
| First Unique Character in a String | Easy |
| Nth Highest Salary | Medium |
| Reverse Pairs | Hard |
| Coin Change | Medium |
Frequently Asked Questions
How many LeetCode questions do Cisco and Deloitte share?
Cisco and Deloitte share 18 LeetCode interview questions. 69 problems appear only in Cisco's list and 25 appear only in Deloitte's list.
What topics overlap most between Cisco and Deloitte?
The most common shared topics between Cisco and Deloitte are Array (9 shared questions), String (7 shared questions), Dynamic Programming (5 shared questions), Hash Table (5 shared questions), Two Pointers (4 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cisco or Deloitte?
Cisco has 24 Easy, 50 Medium, and 13 Hard questions. Deloitte has 17 Easy, 23 Medium, and 3 Hard questions. Cisco has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Cisco and Deloitte?
Start with the 18 shared problems since they cover what both companies ask most often. Then add 20 Cisco-specific and 20 Deloitte-specific questions to round out your prep.