D204 Practice Exam with 100% correct
answers 2024
Which technique can be used to determine the likelihood that a positive diagnostic test result
indicates whether the disease is actually present?
A. Bayes' theorem
B. Central limit theorem
C. Regression
D. Optimization - answer-A
Which concept should be considered when choosing variables for inclusion in a linear regression
model?
A. Feasibility of merging the variables
B. Feasibility of controlling the variables
C. Feasibility of testing the variables
D. Feasibility of classifying the variables - answer-B
A neural network algorithm in machine learning endeavors to recognize underlying relationships in a
set of data.
What does this process mimic?
A. The way a computer processes data
B. The way the human brain operates
C. The way architects establish functionality
D. The way that social media builds networks - answer-B
Which characteristics are used to group data together in a cluster analysis?
Choose 2 answers.
A. Distance
B. Similarity
,D204 Practice Exam with 100% correct
answers 2024
C. Shape
D. Size - answer-A & B
Which tool has libraries that expand its visualization capabilities?
A. Python
B. Tableau
C. Adobe Infographics
D. D3.js - answer-A
Which tools can be used for performing statistics and creating interactive data visualization for large
datasets from various sources?
Choose 2 answers.
A. Gantt Chart
B. SQL
C. Tableau
D. R - answer-C & D
Which type of data representation should a data analyst use to display expense categories as a
percentage of total business expenses?
A. Map visualization
B. Line chart
C. Pie chart
D. Scatter plot - answer-C
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
A. Collecting Data
, D204 Practice Exam with 100% correct
answers 2024
B. Cleaning Data
C. Identifying Outliers
D. Identifying Business Needs - answer-D
In which phase of the data analytics life cycle does an analyst build a histogram?
A. Data Acquisition
B. Data Exploration
C. Discovery
D. Predictive Modeling - answer-B
An analyst applies a statistical formula to obtain the average temperature for a city over the last 50
years.
Which phase of the data analytics life cycle is represented by this activity?
A. Data Acquisition
B. Exploratory Data Analysis
C. Predictive Modeling
D. Data Reporting - answer-B
An analyst has been tasked with defining data columns that could contain null values.
Which activity of the data acquisition phase is represented?
A. Collecting Data
B. Disqualifying Data Sources
C. Detecting missing values
D. Transforming improperly formatted text - answer-C
answers 2024
Which technique can be used to determine the likelihood that a positive diagnostic test result
indicates whether the disease is actually present?
A. Bayes' theorem
B. Central limit theorem
C. Regression
D. Optimization - answer-A
Which concept should be considered when choosing variables for inclusion in a linear regression
model?
A. Feasibility of merging the variables
B. Feasibility of controlling the variables
C. Feasibility of testing the variables
D. Feasibility of classifying the variables - answer-B
A neural network algorithm in machine learning endeavors to recognize underlying relationships in a
set of data.
What does this process mimic?
A. The way a computer processes data
B. The way the human brain operates
C. The way architects establish functionality
D. The way that social media builds networks - answer-B
Which characteristics are used to group data together in a cluster analysis?
Choose 2 answers.
A. Distance
B. Similarity
,D204 Practice Exam with 100% correct
answers 2024
C. Shape
D. Size - answer-A & B
Which tool has libraries that expand its visualization capabilities?
A. Python
B. Tableau
C. Adobe Infographics
D. D3.js - answer-A
Which tools can be used for performing statistics and creating interactive data visualization for large
datasets from various sources?
Choose 2 answers.
A. Gantt Chart
B. SQL
C. Tableau
D. R - answer-C & D
Which type of data representation should a data analyst use to display expense categories as a
percentage of total business expenses?
A. Map visualization
B. Line chart
C. Pie chart
D. Scatter plot - answer-C
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
A. Collecting Data
, D204 Practice Exam with 100% correct
answers 2024
B. Cleaning Data
C. Identifying Outliers
D. Identifying Business Needs - answer-D
In which phase of the data analytics life cycle does an analyst build a histogram?
A. Data Acquisition
B. Data Exploration
C. Discovery
D. Predictive Modeling - answer-B
An analyst applies a statistical formula to obtain the average temperature for a city over the last 50
years.
Which phase of the data analytics life cycle is represented by this activity?
A. Data Acquisition
B. Exploratory Data Analysis
C. Predictive Modeling
D. Data Reporting - answer-B
An analyst has been tasked with defining data columns that could contain null values.
Which activity of the data acquisition phase is represented?
A. Collecting Data
B. Disqualifying Data Sources
C. Detecting missing values
D. Transforming improperly formatted text - answer-C
