Old Mission Capital Online Assessment
Old Mission's screen splits by role. The Quant-Trader OA is a fixed 35-question multiple-choice speed test - 25 minutes, the same questions in the same order for every candidate - heavy on probability, counting, expected value, and conditional probability / Bayes. The software track is a Codility-style set (mixed CS multiple-choice plus 2 coding problems, often a recurring JSON-string parser). Passing the OA leads to a behavioral round, then an onsite (game-EV brain teasers and market-making mental math for traders; C++ / systems for SWE).
Quant Trader — Math/probability speed MC
A fixed, ordered 35-question multiple-choice bank done in 25 minutes (about 43 seconds each) - identical for every candidate. It is pure mental speed: P(sum), handshakes, widget / card EV, two-jar same-color, Bayes (double-headed coin, unsafe driver), pattern races (HH-before-TH, HHH-before-TTTT), and Markov tails (candy belt, donut box). Practice the recovered bank below against the clock.
Software Engineer / NG — Codility coding OA
The SWE / New-Grad OA is a Codility set (mixed MCQ + ~2 coding). The recurring coding problems below are auto-graded.
- Smallest Integer Greater Than N With No Two Equal Adjacent Digits Coding · medium
- Balanced String Split Coding · easy
- Longest Lexicographically Smallest Palindrome From Two Pooled Strings Coding · medium
- Satisfy Customers By Opening At Most 2 Shops Coding · medium
- Count Numbers With Unique Digits Up To N (array variant of LC357) Coding · medium
- Frequency Sort Coding · easy
- Maximum Distinct After Swaps Coding · hard
- Largest Subset With Nonzero Bitwise AND Coding · medium
- Recover the Matrix From Its 2D Prefix Sums Coding · medium
Quant Trader — Short coding
The QT OA sometimes pairs the math bank with a short coding problem. Auto-graded below.
- Array Challenge (left-comparison counter) Coding · medium
- JSON Parser (nested lists of strings) Coding · medium
Old Mission Capital OA — FAQ
What is the Old Mission Capital online assessment?
Old Mission's screen splits by role. The Quant-Trader OA is a fixed 35-question multiple-choice speed test - 25 minutes, the same questions in the same order for every candidate - heavy on probability, counting, expected value, and conditional probability / Bayes. The software track is a Codility-style set (mixed CS multiple-choice plus 2 coding problems, often a recurring JSON-string parser). Passing the OA leads to a behavioral round, then an onsite (game-EV brain teasers and market-making mental math for traders; C++ / systems for SWE).
What is the format of the Old Mission Capital OA?
It runs as 3 tracks (Math/probability speed MC, Codility coding OA, Short coding). Quant Trader, Software Engineer / NG, Quant Trader — each timed, auto-graded where applicable.
How do I practice for the Old Mission Capital online assessment?
Work the sample questions above (each with a full worked solution), then take the interactive Old Mission Capital OA practice on QuantVault. For the full interview, see the Old Mission Capital interview-questions set.