D204 Pre Assessment Questions and
Answers 100% Solved
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
✔✔identifying business needs
In which phase of the data analytics
...
D204 Pre Assessment Questions and
Answers 100% Solved
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
✔✔identifying business needs
In which phase of the data analytics life cycle does the analyst build a histogram? ✔✔data
exploration
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? ✔✔exploratory
data analysis
An analyst has been tasked with defining data columns that could contain null values. Which
activity of the data acquisitions phase is represented? ✔✔detecting missing values
Which activity in the data analytics life cycle occurs during the data acquisition phase and requires
the most time and effort from the data analyst? ✔✔cleaning data
What might be developed by data analysts when acquiring data from a data warehouse? ✔✔the
SQL queries of data within the tables
What can be identified using a box plot? ✔✔interquartile range
What will be the consequence of poor attention to detail during the data exploration phase? ✔✔The
analyst will lack insight into the structure of the data set
Which aspect of data exploration occurs when an analyst writes code to compile a bar graph of
dog food sales per month? ✔✔verification through visualization
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? ✔✔to minimize interruptions from
maintenance shutdowns
During which phase in the data analytics life cycle would a churn analysis be performed?
✔✔predictive analysis
Which mistake is commonly made during the predictive analytics phase? ✔✔The model is
developed before the research question is known
Why might a data analyst resample a data set with replacement data in a data mining project?
✔✔too little data for training and testing tool sets
A data analyst has identified combinations of sales t
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