Akuna Captial is a financial quantitative trading firm headquartered in Chicago, United States, founded in 2011 and specializing in options market making and derivatives trading. As the world's leading options market maker, its core business is to facilitate market trading by providing liquidity (i.e., two-way quotes) and to maintain a competitive advantage by relying on low-latency technology, mathematical models and automated trading systems. Akuna's domestic and international hiring has only gotten hotter in recent years, take a look at the Akuna Captial OA review process:
Round 1 OA-Coding (120 min 3 courses)
1. Minimum Swaps : Given a disordered array, find the minimum number of swaps to keep the array in order.
- Idea:Using graph theory + visited arrays, first convert a sorting problem in arrays into a ring problem in graph theory; then track which elements have been processed by a visited array; finally iterate over each element, and if it has not been visited and is not in the correct position, use it as a starting point to find the ring it is in, and add the length of the ring -1 to the total number of exchanges.
- Focus:Handling duplicate elements and boundary cases.
2. Delivery Managem ent System : sim ulation of task scheduling
- Idea: Initialize two structures, task list and priority queue, then use event-driven simulation to handle two types of events, task arrival and task completion. If the CPU is busy during scheduling, the new task enters the waiting queue, and the timing problem is dealt with by jumping the system time exactly to the next event point until all tasks are executed.
- Points:Queue concurrency, delay processing, boundary timing.
3. Binary Circuit: simulation of signal propagation process
- Approach: First, model the circuit as a directed graph and initialize all node states; then use a queue to perform BFS, propagating signals starting from the input nodes; finally, calculate the new output based on the gate type. If the state changes, update and trigger the fan-out nodes. Repeat this process until the queue is empty, while also addressing the signal oscillation issue.
- Difficulties: boundaries, state repetition, performance optimization.
Round 2 Math OA (15 min 3 courses)
The first round of OA test case all over the week to receive the second round of OA, the form is Hirevue, open the video while doing Multiple Choice ( Brain Teaser, Probability ), can not go back, thoughts on the spot must be clear.
- How many ways are there to divide 30 people into two groups with at least 1 person in each group.
- Sums 1-100, divided by numbers containing 7 or 8.
- A 0-9 ten-digit permutation that satisfies the condition that the neighbor of each digit is a multiple or a factor of that digit.
Summarize
1. LeetCode Targeted Training: Focus on Medium and above difficulty topics, focus on the three high-frequency questions, array/string transformations, priority queue/heap applications, state simulation and graph theory traversal.
2. Strengthen the foundation of algorithms and mathematical thinking: Be able to clearly explain the time / space complexity of different data structures (e.g., hash tables, trees) and their application scenarios, and build up the ability to quickly model and reason about combinatorics, conditional probability and expected value problems. Build the ability to quickly model and reason about combinatorics, conditional probability, and expected value problems.
3.Simulation and Engineering Optimization: Strict time limits are imposed on daily practice, simulating the stressful environment of interviews to improve the bug-free rate and speed of problem solving.
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