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What technique would you employ to assemble a binary tree using preorder and inorder traversal information?

Rovio

Hewlett Packard

2 years ago

What insights can be derived from the coefficients of a logistic regression in predicting an event's probability?

Google

Qualtrics

2 years ago

In your experience, what kind of problems can be solved using XGBoosting?

New Relic

GitHub

2 years ago

Statistics

Describe the process of creating an ROC curve given a set of predicted probabilities and true labels.

Ally

Marqeta

2 years ago

ML System Design

What approach would you take to train a machine learning model to accurately identify violations of terms and potentially harmful content in multimedia content and ads?

Twitter

Google

2 years ago

System Design

Architect a web-based system for hotel bookings.

2 years ago

How do dimensionality reduction techniques help to simplify complex data sets, and what are some common methods used in this process?

Taboola

Stitch Fix

2 years ago

What's the workflow of PCA in simplifying data?

Ancestry

PayPal

2 years ago

Coding

Two Sum

You're presented with an array of integers and a specific target value. Your task is to identify and return the indices of two numbers from the array that add up to the target. You can assume there's exactly one solution, and you can't use the same element twice. The indices can be returned in any order.

Input: nums = [14,8,22,6], target = 20

Output: [1,3]

Explanation: The integers at indices 1 and 3 (8 and 6) sum up to 20, so we return [1, 3].

2 years ago

Distinguishin between bias and variance and describing how they affect machine learning?

BetterUp

Square