Recommender Systems with Machine Learning - Count

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Information Technology (IT), Architecture, Social Studies
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University
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What function is used to determine the number of unique users in a dataset?
average()
length()
count()
sum()
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is used to format strings for displaying unique user and movie counts?
join()
replace()
format()
split()
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the dataset grouped to calculate the count of each rating level?
By timestamp
By rating column
By user ID
By movie ID
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of grouping the dataset by the rating column?
To sort the ratings
To find the average rating
To determine the size of each rating level
To filter out low ratings
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of multiplying the number of users by the number of items?
To calculate the total number of ratings
To ensure all numbers are satisfied
To visualize the data
To find the average rating
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of multiplying 610 by the number of items?
A very big number
The same number
A small number
Zero
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the next step after ensuring all numbers are satisfied?
Start a new dataset
Give the remaining count a 0 rating
Recalculate the ratings
End the analysis
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