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Coding
a year ago
Can you develop a function to find the longest path within a Directed Acyclic Graph?
Machine Learning EngineerData Scientist
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Ally

Samsara Logo

Samsara

Venmo Logo

Venmo

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a year ago
System Design
a year ago
Propose a high-level design for a backup system that can handle millions of incremental backups daily.
Machine Learning Engineer
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Ally

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a year ago
Coding
a year ago

Best Time to Buy and Sell Stock

You have access to an array where each element represents the price of a specific stock on a given day. Your objective is to maximize profit by selecting one day to purchase the stock and a different, future day to sell it. Determine and return the maximum profit achievable. If it's impossible to generate a profit, return 0.

Input: prices = [9,3,8,2,7,5]

Output: 5

Explanation: Purchase on day 2 (price = 3) and sell on day 5 (price = 7) for a profit of 7 - 3 = 4.

Machine Learning Engineer
Ally Logo

Ally

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a year ago
Coding
a year ago
In your experience, how do you go about finding the largest total within a contiguous subarray?
Machine Learning Engineer
Ally Logo

Ally

Capital One Logo

Capital One

Soundcloud Logo

Soundcloud

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a year ago
ML Knowledge
a year ago
Would you mind shedding some light on what an attention model is?
Machine Learning Engineer
Ally Logo

Ally

Taboola Logo

Taboola

Grammarly Logo

Grammarly

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a year ago
Coding
a year ago
How would you approach the problem of identifying if a single swap could make two strings match?
Machine Learning EngineerData Scientist
Ally Logo

Ally

Dell Logo

Dell

Transferwise Logo

Transferwise

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a year ago
ML Knowledge
a year ago
When deciding between Lasso and Ridge regression models, what factors do you take into consideration?
Machine Learning Engineer
Ally Logo

Ally

Duolingo Logo

Duolingo

Wish Logo

Wish

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a year ago
System Design
a year ago
Design a buy-now-pay-later system for Ally
Machine Learning EngineerSite Reliability Engineering ManagerEngineering ManagerTechnical Program Manager
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Ally

Citrix Logo

Citrix

Farfetch Logo

Farfetch

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a year ago
ML Case
a year ago
Can you propose a structure for a model that excels in object detection within visual frames?
Machine Learning Engineer
Ally Logo

Ally

Wayfair Logo

Wayfair

NetEase Logo

NetEase

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a year ago
ML Knowledge
a year ago
How do you explain the distinction between bias and variance in machine learning?
Machine Learning Engineer
Ally Logo

Ally

Grab Logo

Grab

Qualcomm Logo

Qualcomm

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a year ago

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*All interview questions are submitted by recent Ally Machine Learning Engineer candidates, labelled and categorized by Prepfully, and then published after being verified by Machine Learning Engineers at Ally.

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