Weekly challenge 4
Note de la soumission la plus récente 87.5 %
1.
Question 1
Fill in the blank: Once data is clean, a data analyst moves on to _____ and verification.
1 / 1 point
processing
reporting
confirming
publishing
Correct
Once data is clean, a data analyst moves on to reporting and verification.
2.
Question 2
What is involved in seeing the big picture when verifying data cleaning? Select all that apply.
1 / 1 point
Consider the business problem
Correct
To see the big picture when verifying data cleaning, consider the business problem, the goal, and the data.
Consider the data
Correct
To see the big picture when verifying data cleaning, consider the business problem, the goal, and the data.
Consider the reporting
Consider the goal
Correct
To see the big picture when verifying data cleaning, consider the business problem, the goal, and the data.
3.
Question 3
Which function removes leading, trailing, and repeated spaces in data?
1 / 1 point
TRIM
TIDY
CUT
CROP
Correct
TRIM is a function that removes leading, trailing, and repeated spaces in data.
4.
Question 4
What tool can a data analyst use to figure out how many identical errors occur in a dataset?
1 / 1 point
CASE
COUNTA
CONFIRM
COUNT
Correct
A data analyst can use COUNTA to figure out how many identical errors occur in a dataset.
5.
Question 5
Which SQL tool considers one or more conditions, then returns a value as soon as a condition is met?
1 / 1 point
CASE
THEN
ELSE
WHEN
Correct
CASE considers one or more conditions, then returns a value as soon as a condition is met.
6.
Question 6
Fill in the blank: Documentation is the process of tracking _____ during data cleaning. Select all that apply.
1 / 1 point
additions
Correct
Documentation is the process of tracking changes, additions, deletions, and errors during data cleaning.
deletions
Correct
Documentation is the process of tracking changes, additions, deletions, and errors during data cleaning.
inactivity
changes
Correct
Documentation is the process of tracking changes, additions, deletions, and errors during data cleaning.
7.
Question 7
At what point during the analysis process does a data analyst use a changelog?
1 / 1 point
While gathering the data
While reporting the data
While cleaning the data
While visualizing the data
Correct
A data analyst uses a changelog while cleaning data.
8.
Question 8
Reviewing version history is an effective way to view a changelog in SQL.
0 / 1 point
True
False
Incorrect
Review the video on data cleaning for a refresher.