FREE Data Science Basic Questions and Answers
Choose the following and note which one has a reduction in dimensionality.
Collinearity is frequently reduced using dimensionality reduction techniques like Principal Component Analysis (PCA) or Singular Value Decomposition (SVD). When two or more features in a dataset are highly correlated, it is referred to as collinearity. This can cause problems with model estimation, interpretation of individual
Dimensionality reduction helps reduce collinearity by converting the original features into a lower-dimensional space while maintaining significant information and lowering the correlation between features.
Which of these doesn't happen throughout the data science process?
While effective communication is essential to the data science process in order to communicate insights and results to stakeholders, it is not usually regarded as a separate step within the data science workflow. Instead, it is referred to as "communication building." In the data science process, the other choices—Operationalize, Model planning, and Discovery—are crucial.
Find the clustering technique that accounts for data variance.
Gaussian Mixture Model (GMM) clustering clearly accounts for variance in the data. GMM considers each cluster as a Gaussian distribution with its own mean and covariance matrix, allowing for more variable cluster forms and handling variance in the data, in contrast to K-means, which reduces within-cluster variance.
A _________ representation of data is called a column.
In a spreadsheet or data table, a column is organized vertically, with each entry extending down one column. It is simple to compare values inside the same variable or feature thanks to this vertical structure.
"Which machine learning algorithm uses the bagging concept as its foundation?"
An ensemble learning technique called Random Forest "bagging" combines several decision trees. In order to increase accuracy and resilience, bagging entails training each decision tree on a different subset of the training set and then combining their predictions. Thus, among the possibilities given, Random Forest is the best option.
What does the K imply algorithm's K stand for?
The K mean algorithm uses K to represent the number of iterations.
Select if the following assertion is accurate or not:
Unstructured information isn't arranged. Unstructured data can nonetheless exhibit internal organization and patterns even though it may not have the same predetermined structure as structured data. Text documents, for instance, might have phrases, paragraphs, and words, whereas images might have specific patterns or visual elements. As a result, although not in the same structured manner as structured data, unstructured data can nevertheless be organized.
Select the appropriate data science components.
All of the above, Domain expertise aids in comprehending the context and requirements of the problem being solved; data engineering entails the collection, cleaning, and processing of data; and advanced computing refers to the application of complex algorithms and computational techniques to analyze and extract insights from the data. All of the aforementioned components are crucial to the field of data science.
How many groups in total can data be characterized?
There are two types of data: structured and unstructured.
Structured data is data that has been formatted and arranged according to a predetermined scheme, such spreadsheets and databases.
Unstructured data, which includes written documents, photos, and videos, is information that lacks a predetermined format or organization.
Which architectural design is also referred to as a systolic array?
In the context of computing, "systolic arrays" particularly refer to a kind of parallel computing architecture in which data is regularly and synchronously transferred among a network of processing nodes. In fact, MISD (Multiple Instruction, Single Data) is more closely related to this architecture than SIMD. The MISD (Multiple Instruction, Single Data) architecture is frequently referred to as "systolic arrays".
What language is utilized in the field of data science?
The field of data science uses Ruby. R is the most widely used language in data science among the options given. R is a popular choice for data analysis and visualization activities since it was created expressly for statistical computation and graphics, even if other languages like Python and SQL are also widely used in data science.