Data Science

Categories: Code Problem / Data Structures and Algorithms / Recursion (32) Code Problem / Data Structures and Algorithms / Binary Search (30) Code Problem / Data Structures and Algorithms / Linked Lists (26) Code Problem / Data Structures and Algorithms / Backtracking (26) Code Problem / Data Structures and Algorithms / Stacks and Queues (25) Code Problem / Data Structures and Algorithms / Hashing (24) Databases / SQL / Backup and Recovery (19) Code Problem / Data Structures and Algorithms / Arrays and Strings (19) Databases / SQL / Database Normalization (18) Code Problem / Data Structures and Algorithms / Time Complexity (17) Databases / SQL / Locking (16) Databases / SQL / Replication (15) Databases / SQL / SQL Queries (13) Code Problem / Data Structures and Algorithms / Graphs (13) Databases / SQL / Database Security (13)  More...

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Machine Learning / Data Science
This problem asks for a machine learning model that can predict whether or not a loan will default.
About this solution: This is a good start, but the candidate's solution is incomplete. In order to make an accurate prediction, the machine learning algorithm would need to take into account a variety of factors, such as the borrower's credit score, employment history, and the amount of the loan.
Oct 28
Machine Learning / Data Science DifficultyMedium
A machine learning algorithm is used to identify which features in a dataset are most predictive of the target variable. This can be used to reduce the dimensionality of the data and improve the performance of the machine learning models.
About this solution: The candidate's solution is complete and solves the problem. The candidate has correctly identified that a feature selection algorithm is needed to identify the most predictive features. This is a good approach to the problem.
Oct 28
Machine Learning / Data Science
A system that can automatically detect plagiarism in documents is needed.
About this solution: The candidate's solution demonstrates a level of completeness and solves the problem. The general approach is efficient and would work well in practice.
Oct 27
Machine Learning / Data Science
To predict the price of a house, we can use linear regression to learn the relationship between house size and price. Then, to predict the price of a new house, we can simply plug in the size of the house into the trained model.
About this solution: The candidate's solution is correct and demonstrates a good understanding of the problem. The linear regression model is a good choice for this problem.
Oct 22
Machine Learning / Data Science
This problem involves clustering customer reviews in order to group together similar reviews and distinguish different groups of reviews. This can be done using unsupervised learning methods such as k-means clust ering.
About this solution: The candidate's solution is complete and solves the problem. The approach is sensible and would likely work well in practice.
Oct 16