WGU D204 Practice Exam 2023 – 2024 Questions and Answers (Verified Answers)

1 / 12
WGU D204 Practice Exam 2023 – 2024
Questions and Answers (Verified Answers)

1. Which activity does an analyst perform in the discovery phase of the
   data analytics life cycle?
   A. Collecting Data
   B. Cleaning Data
   C. Identifying Outliers
   D. Identifying Business Needs ANS D
2. 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 ANS B
3. 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?

2 / 12
A. Data Acquisition
B. Exploratory Data Analysis
C. Predictive Modeling
D. Data Reporting ANS B

4. 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 ANS C
5. Which activity in the data analytics life cycle occurs during the data
   acqui- sition phase and requires the most time and effort from the data
   analyst?
   A. Selecting the data sources
   B. Importing data into a database
   C. Cleaning Data
   D. Defining goals ANS C

3 / 12

6. What might be developed by data analysts when acquiring data from a
   data warehouse?
   A.The procedures for extracting files form the data warehouse
   B.The procedures for updating tables in data warehouse
   C.The relational structure of tables
   D.The SQL queries of data within the tables ANS D
7. What can be identified using a box plot?
   A. Frequency
   B. Correlation
   C. Interquartile range
   D. Mean ANS C
8. What will be a consequence of poor attention to detail during the
   data exploration phase?
   A. Not enough variables will be considered in the analysis
   B.The outcome of the analysis will be misaligned to business needs
   C.The analyst will lack insight into the structure of the data set
   D.The model will be built using the wrong data set ANS C
9. Which aspect of data exploration occurs when an analyst writes code
   to compile a bar graph of dog food sales per month?
   A. Performance of a correlation analysis
   B. Analysis of data anomalies