Who knew the Uber 2026 Online Assessment had so many “free-point” questions?
Using Python’s efficiency and a few reusable templates, I cleared all 4 questions in just 22 minutes, with plenty of time left from the 70-minute limit. Below is a complete breakdown of the OA, the core problem-solving ideas, and a limited-time promotion for candidates targeting Uber and other big tech companies.
Uber 2026 OA: Core Information You Must Know
Platform
CodeSignal
Strongly recommend getting familiar with the interface in advance to avoid wasting time during the test.
Format
4 questions
70 minutes total
Difficulty
Medium to Hard overall
3 out of 4 questions are classic template-based problems if you recognize the patterns
High-Frequency Topics
Binary operations
Monotonic stacks
Subarray permutations
String swaps
These are extremely common across big tech OAs, not just Uber.
Question Breakdown and Python Solution Ideas
Q1: Minimum Operations to Reduce a Binary Number to Zero
Problem Summary
You’re given a positive integer n. In one operation, you may add or subtract 2^i (i ≥ 0). Find the minimum number of operations needed to reduce n to 0.
Key Insight
Process the binary representation from least significant bit to most significant bit, while carefully maintaining carry.
Core Logic
Current bit = original bit + carry
If current bit is 1, subtract 1 and increment operation count
If current bit is 2, propagate carry without extra operations
Why This Works
Binary carries must be handled from LSB to MSB. Processing in the opposite direction will produce incorrect results.
Implementation Notes
Python bitwise operations make this very concise
The full solution can be written in under 10 lines
Q2: Discounted Price Sum Calculation
Problem Summary
Each item’s final price equals its original price minus the price of the first item to its right with a price less than or equal to it. If no such item exists, the original price is used.
Return the total final price and the indices of items sold at full price.
Key Insight
This is a classic monotonic stack problem.
Core Logic
Traverse from right to left
Maintain a monotonic increasing stack
If the stack is empty, use the original price and record the index
Otherwise, subtract the top of the stack
Important Detail
The indices of full-price items must be sorted before returning, or you’ll get a Wrong Answer.
Performance
O(n) time complexity
Python lists work perfectly for stack operations
Q3: Balanced Subarray Check
Problem Summary
For each k from 1 to n, determine whether there exists a subarray that is a permutation of 1 to k.
Key Insight
Track the interval containing numbers 1 through k.
Core Logic
Precompute pos[value] for each number
Maintain L = min position of 1..k
Maintain R = max position of 1..k
If R - L + 1 == k, then such a subarray exists
Optimization
Update min and max incrementally
No rescanning required
Overall O(n) time complexity
Q4: Maximum Pairs by Swapping Digits
Problem Summary
Two numbers form a valid pair if one can be transformed into the other using at most two swaps (including zero swaps). Count the total number of such pairs.
Key Insight
Group numbers intelligently before comparison.
Core Logic
Ignore numbers with different lengths
Convert numbers to strings and sort characters
Group identical sorted strings using a hash map
For numbers that differ, ensure the number of mismatched positions is ≤ 4 and characters can be paired
Why It Works
At most two swaps can only fix limited mismatches
Sorting + hashing dramatically reduces comparisons
Python Advantage
sorted() and dictionaries keep the implementation short and readable
Proven Tips to Pass Uber and Other Big Tech OAs
Start with familiar problems
Usually 2 out of 4 questions are free points
Reuse templates
Have ready-made Python templates for
- Binary carry processing
- Monotonic stacks
- Hash-based counting
Watch edge cases
Carry handling
Index ordering
Character mismatch logic
Time management
20–30 minutes is usually enough
Do not get stuck early on one question
Exclusive Promotion: One-Pass Big Tech OA Support
Many candidates fail not because of weak skills, but due to time pressure, careless mistakes, or unfamiliar platforms.
We’re offering limited support to help you clear OAs efficiently.
What’s Included
Full support for big tech OAs, including Uber, TikTok, and Stripe
Platforms covered: CodeSignal, HackerRank, Niuke
Service Types
OA ghostwriting
Real-time exam assistance
High-frequency question drills
Trace-free remote operation for stability
Bonus
First 20 enquiries receive a Python template bundle
Includes Uber 2026 OA real question code and 100 high-frequency big tech OA problems
Guarantee
90%+ one-pass success rate
Free re-assistance if unsuccessful
With over 60% question repetition on CodeSignal for classic topics, this is the perfect time to target Uber and similar companies.
Get Started
Comment “Uber Go” to receive
- The Python template bundle
- Access to the consultation channel
Spots are limited.
Wishing everyone a smooth OA and an early offer.
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