PRACTICE GUIDE BELVEDERE TRADING
Belvedere Trading Coding Challenge Practice
Outcry’s Belvedere Trading coding challenge practice section has 2 questions in 30 minutes. These numbers describe the linked mock; the source check below distinguishes published details from practice settings.
Our combined mock includes both skill tracks. Trader candidates should treat coding as supplementary; 14 maths questions, two coding tasks and the clocks are Outcry settings.
Outcry is not affiliated with Belvedere Trading and has no access to their assessment content. This guide describes an assessment format that candidates report publicly; the questions here are generated by Outcry and are not Belvedere Trading’s own.
What it screens
A Chicago-based proprietary trading firm specialising in options market making and derivatives strategies.
- ✓Reading concurrent code and pointing at the defective line
- ✓Order-book data structures: what happens on a cross, a cancel, a partial fill
- ✓Algorithmic complexity chosen for the input sizes stated in the problem
- ✓Monte Carlo methods and when a simulation beats a closed form
Where it sits at Belvedere Trading
Belvedere’s campus process places a timed technical challenge after application. It specifies probability and logic for traders, or coding for developers.
Practice stage: Initial technical challenge · firm process Step 2. Our combined mock includes both skill tracks. Trader candidates should treat coding as supplementary; 14 maths questions, two coding tasks and the clocks are Outcry settings.
The format
These are the settings used by Outcry’s Belvedere Trading practice sitting. They are not automatically the employer’s published format; see the linked assessment’s source check.
| Questions | 2 |
|---|---|
| Time | 30 minutes |
| Per question | 15 minutes |
| Negative marking | No |
| Answer style | Code editor, run against hidden tests |
| Where it sits | Initial technical challenge · firm process Step 2 |
What it tests, with a worked example
Every example below is generated by Outcry, drawn from the same question generators the timed drills run. None of them is Belvedere Trading’s.
Data structure implementation
Build the thing rather than call it: an order book, a cache, a ring buffer. Graded by hidden tests, so there is no partial credit for an approach.
Complexity that is actually graded
Hidden tests sized so the naive solution times out. A correct answer that is too slow scores the same as a wrong one.
Reading someone else's code
A diff or a function with a bug in it, and the question is where.
Example
Which change most reduces cache misses when summing a large matrix?
- Use a larger integer type
- Iterate in row-major order matching the memory layout
- Unroll the loop 2×
- Mark the accumulator volatile
Answer Iterate in row-major order matching the memory layout
Sequential access uses the whole cache line that was fetched. Striding across rows discards most of every line.
Language and systems detail
Memory, references, undefined behaviour and the things that bite in production.
Example
A block code has a minimum Hamming distance of 8. How many bit errors can it correct?
- 8
- 3
- 4
- 7
Answer 3
Correction needs 2t + 1 <= 8, so t = floor((8 - 1)/2) = 3. The same code can detect 7 errors, which is the number this question is usually confused with.
Edge cases
Empty input, one element, duplicates and overflow. The hidden tests always include them.
Probability behind the problem
Screens that look like coding questions and are really expectation questions.
Example
Daily P&L is normal with mean 180 and standard deviation 6. What share of days come in above 192?
- 2.3%
- 97.7%
- 1.1%
- 4.6%
Answer 2.3%
192 sits exactly 2 standard deviations above the mean. The 68-95-99.7 rule leaves about 5% outside that band and half of it in the upper tail, so 2.3%. Forgetting to halve is the usual slip.
What a good score looks like
Use this mock’s score and worked review to identify skills to practise. No Outcry score guarantees a pass or a hiring outcome; a current employer threshold for this practice paper has not been verified.
How to train for it
- 01Implement the core structures from scratch once each. The screens ask you to build them, not use them.
- 02Write the edge cases into your own tests first. That is where the hidden ones live.
- 03Practise without an autocomplete. The screens run in a bare editor, and the gap between writing code with help and without it is larger than most people expect.
TRAIN IT HERE
The drills that match each section
Concurrency Clash
Find the data race, name the fix - real C++ defect patterns, five levels.
Order Book
Matching-engine mechanics: crosses, cancels and partial fills.
Algorithm Interview Track
DP tables, Monte Carlo estimation and speed rounds at four difficulty tiers.
SIT THE FULL BATTERY
All the sections back to back on one clock, marked the way the real screen marks them, with a by-skill breakdown at the end. Included with any pass.
Also reported at Belvedere Trading
Common questions
- Is this Belvedere Trading’s official coding challenge test?
- No. Outcry generates its own questions. Belvedere’s campus process places a timed technical challenge after application. It specifies probability and logic for traders, or coding for developers. Our combined mock includes both skill tracks. Trader candidates should treat coding as supplementary; 14 maths questions, two coding tasks and the clocks are Outcry settings.
- How long is this coding challenge practice section?
- 2 questions in 30 minutes in the Outcry mock. These are practice settings unless the source check explicitly confirms them.
- How is the practice marked?
- Correct answers earn 1 mark unless the question states another weight. Wrong answers lose 0; unanswered items lose 0, including timeouts. These rules apply to this mock.
- Where can I check the employer’s process?
- See the public source check on the linked assessment. Your role-specific invitation governs the actual format, permitted tools and scoring.