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In data science, what is the primary goal of dimensionality reduction techniques like Principal Component Analysis (PCA)?

In data science, what is the primary goal of dimensionality reduction techniques like Principal Component Analysis (PCA)? Correct Answer To reduce the number of features while preserving important information

Related Questions

The most popularly used dimensionality reduction algorithm is Principal Component Analysis (PCA). Which of the following is/are true about PCA?
1. PCA is an unsupervised method
2. It searches for the directions that data have the largest variance
3. Maximum number of principal components 4. All principal components are orthogonal to each other
What is the primary goal of dimensionality reduction techniques like Principal Component Analysis (PCA) in machine learning?
In a class of 60 students, 20 students like Math, 25 students like English and 30 students like Science. If 5 Students like both Math and Science, 8 Students like both English and Science and 3 students like neither of these subjects, how many students like all of the three subjects?
Which of the following type of data science question is missing in the figure?
Introduction to Data Science mcq question image
What is the primary goal of dimensionality reduction techniques in data modeling?
Which of the following analysis should come in place of question mark in the below figure?
Introduction to Data Science mcq question image
In a group, 29 people like to watch movies, 35 people like to watch web series and 34 people like to watch YouTube videos. Also, 13 people like to watch only movies, 21 people like to watch only web series and 15 people like to watch only YouTube videos. 4 of them like to watch only movies and web series. 3 of them like to watch movies, web series and YouTube videos as well. How many people like to watch both movies and YouTube videos?
Fact 1: All dogs like to run.
Fact 2: Some dogs like to swim.
Fact 3: Some dogs look like their masters.

If the first three statements are facts, which of the following statements must also be a fact?
I: All dogs who like to swim look like their masters.
II: Dogs who like to swim also like to run.
III: Dogs who like to run do not look like their masters.
You develop an enterprise application, called XYZApplication that includes a Windows Form presentation layer, middle-tier components for business logic and data access, and a Microsoft SQL Server database.
You are in the process of creating a middle-tier component that will execute the data access routines in your application. When data is passed to this component, the component will call several SQL Server stored procedures to perform database updates. All of these procedure calls run under the control of a single transaction.
The code for the middle-tier component will implement the following objects:
SqlConnection cn = new SqlConnection();
SqlTransaction tr;
If two users try to update the same data concurrently, inconsistencies such as phantom reads will occur. You must now add code to your component to specify the highest possible level of protection against such inconsistencies.
Which code segment should you use?
Data Products shown in the below figure is built using which programming language?
Introduction to Data Science mcq question image