Machine Learning Basics

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Questions and Answers

What is the primary goal of supervised learning?

  • To predict outcomes based on labeled data (correct)
  • To discover hidden patterns in unlabeled data
  • To generate new data points
  • To reduce the dimensionality of data

Which of the following algorithms falls under unsupervised learning?

  • Decision Tree
  • K-Means Clustering (correct)
  • Support Vector Machine
  • Linear Regression

What does 'training' a machine learning model generally refer to?

  • Adjusting the model's parameters based on training data (correct)
  • Collecting and labeling new data
  • Evaluating the model's performance on unseen data
  • Deploying the model to a production environment

What is the purpose of a 'validation set' in machine learning?

<p>To estimate the model's performance on unseen data during training (D)</p> Signup and view all the answers

Which of the following is a common metric for evaluating the performance of a classification model?

<p>Accuracy (A)</p> Signup and view all the answers

What is 'overfitting' in machine learning?

<p>When a model performs very well on the training data but poorly on unseen data (C)</p> Signup and view all the answers

What is a 'feature' in the context of machine learning?

<p>An individual measurable property or characteristic of a phenomenon being observed (A)</p> Signup and view all the answers

Which of the following is a technique to reduce overfitting?

<p>Using more training data (C)</p> Signup and view all the answers

What type of problem is best suited for a 'regression' algorithm?

<p>Predicting a continuous value (C)</p> Signup and view all the answers

What is the purpose of 'data preprocessing' in machine learning?

<p>To improve the quality of the data and make it suitable for training (A)</p> Signup and view all the answers

Flashcards

What is an array?

A data structure where elements are arranged sequentially, each accessed by its index (position).

What is a linked list?

A data structure where elements are connected in a linear sequence, but stored at different memory locations. Each element points to the next.

What is a stack?

A data structure that follows the Last-In-First-Out (LIFO) principle. The last element added is the first one removed.

What is a queue?

A data structure that follows the First-In-First-Out (FIFO) principle. The first element added is the first one removed.

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What is a tree?

A hierarchical data structure where each node has zero or more child nodes, and one root node.

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What is a binary tree?

A tree data structure where each node has at most two children, which are referred to as the left child and the right child.

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What is a max heap?

A tree where the value of each node is greater than or equal to the value of its children.

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What is a graph?

A collection of nodes (vertices) and edges that connect pairs of nodes. It represents relationships between objects.

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What is a directed graph?

A type of graph where the edges have a direction, indicating a one-way relationship between nodes.

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