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Data Management & data analytics exam
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- EMLV (EMLV)
Data Management & data analytics exam
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Use the Sakila sample database model, which is designed to represent a DVD rental store in MySQLWorkbench, below the link:
https://dev.mysql.com/doc/sakila/en/
You can also find this database model in the Content section in the Resources folder
1. How many tables exist in the layer of customer data?
Correct answer: 4
2. How many relationships exist in the layer of customer data between the tables in this layer?
Correct answer: 3
3. How many primary keys exist in the layer of inventory?
Correct answer: 5
4. How many foreign keys exist in the layer of inventory?
Correct answer: 9
5. Use the forward engineering command that generates sql code to implement the Sakila database
model, then, read the sql code and write the name of the fourth table that is created
Correct answer: address
Read the brief case study "Advertising Experiments at Restaurant Grades"; then, download the
dataset and set your working directory in R to the path you have downloaded the dataset
6. How many independent restaurants are in each treatment group? * Hint: use pivot table or
subtotals or count or filter and select with Excel
Correct answer: 6000
7. How many chain restaurants are in each treatment group? * Hint: use pivot table or subtotals or
count or filter and select with Excel
Correct answer: 4000
Please visit the visualizations in each link to answer the questions, each question refers to the
number of the link and all the links are below:
1. https://datastudio.google.com/reporting/1I1e3lzjbnlr43e-8wNX79OzQTSL8usyS/page/0HFN
2. https://datastudio.google.com/reporting/6e5399fb-a083-49a1-8bcb-37611d160728/page/1B88
3. rpubs.com/erikernestov/working_paper_1
4. https://ourworldindata.org/personal-relations-econ-outcomes
5. https://drive.google.com/open?id=1Gqs_0csBbqliHW_zHtCB1Y-A6ZpqmLFj
, 8. How many gold medals did Sweden get in the Winter Olympic Games of 1994? *Use link 1
Correct answer: 2
9. A visualization made from the e-commerce database shows the online operations in Brazil, what is
the maximum number of operations (geolocation_state) in the color scale?*Use link 2 and write only
the integer number without commas or decimals
Correct answer: 6168
10. A visualization made from the e-commerce database shows the online operations in Brazil. If you
make a close view on the Sao Paulo area (hoover mouse over), what is the name of city in the north
east (outside Sao Paulo)? *Use link 2 and write this name in lower case
Correct answer: Taubate
11. A visualization made from an online experiment, the first boxplot shows 3 treatment groups,
which treatment group has an outlier? *Use link 3 first boxplot and write only the integer number of
the treatment group
Correct answer: 1
12. A visualization made from an online experiment, the first boxplot shows 3 treatment groups and
the mean value market with a black line, which treatment group has the second highest mean value?
*Use link 3 first boxplot and write only the integer number of the treatment group
Correct answer: 2
13. What is the % of people using the most popular method to find a job in Spain 2008? *Use link 4
and write only the integer number (without the %)
Correct answer: 84
14. What is the ranking priority of roles which require data machine learning and AI in the global
health and healthcare industry? *Use link 5 page 19 of the report
Correct answer: 3
15. To gain data visualization skills in the Media & Entertainment Industry of North America, it is
worthy to import talent from ________ *Use link 5 page 11 of the report
Correct answer: Europe
Which character is an error in the following instructions?
You should answer with the right character only - all responses require only one character
Example:
Given instruction: cat("/014")
Answer: \
16. Cat("\014")
Correct answer: c
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