WGU D204 OBJECTIVE ASSESSMENT Questions and Answers 2023 - 2024 (Verified Answers)
1.Which activity does an analyst perform in the discovery phase of the data analytics life cycle ANS identifying business needs
2.In which phase of the data analytics life cycle does the analyst build a histogram ANS data exploration
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 ANS exploratory data analysis
4.An analyst has been tasked with defining data columns that could
contain null values. Which activity of the data acquisitions phase is
represented ANS - detecting missing values
5.Which activity in the data analytics life cycle occurs during the data acquisition phase and requires the most time and effort from the data an- alyst ANS cleaning data
6.What might be developed by data analysts when acquiring data from a data warehouse ANS the SQL queries of data within the tables
7.What can be identified using a box plot ANS interquartile range
8.What will be the consequence of poor attention to detail during the data exploration phase ANS The analyst will lack insight into the structure of the data set
9.Which aspect of data exploration occurs when an analyst writes
code to compile a bar graph of dog food sales per month ANS
verification through visualization
10.An oil company uses robots and sensors to detect how pipeline corrosion changes over time. The collected data is then used in a predictive model that estimates when a pipe should be replaced. How does
the predictive model serve this oil company ANS to minimize interruptions from maintenance shutdowns .During which phase in the data analytics life cycle would a churn analysis be performed ANS predictive analysis
12.Which mistake is commonly made during the predictive analytics phase ANS The model is developed before the research
question is known
13.Why might a data analyst resample a data set with replacement data in a data mining project ANS too little data for training and testing tool sets
14.A data analyst has identified combinations of sales transactions that frequently occur together in data over the past 5 years. Which phase of the data analytics life cycle is represented by this analysis ANS data mining
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