Writing Procedures to Process Datasets Quick Check
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Question
Use the image to answer the question.
A table with the results for 10 men in a 100-meter sprint including their place, name, country, and time, including:
1 Kim Collins SKN 10.01
2 Leonard Scott USA 10.10
3 Michael Frater JAM 10.11
4 Jason Gardener UK 10.12
5 Marlon Devonish UK 10.13
6 Darrel Brown TRI 10.14
7 Marc Burns TRI 10.15
8 Ainsley Waugh JAM 10.31
9 Daniel Plummer UK 10.46
DQ Maurice Greene USA DQ
Source: Oxford Designers & Illustrators Ltd. Pearson Education Ltd
Consider the relation race. What is displayed by len(race)?
(1 point)
Responses
9
9
10
10
3
3
4
4
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The answer is 9.
The correct answer is 9.
To answer this question, we need to understand what the `race` relation represents. Looking at the given information, the `race` relation is a table that contains the results for 10 men in a 100-meter sprint, including their place, name, country, and time.
To find out what is displayed by `len(race)`, we need to determine how many rows or records are there in the `race` relation, as the `len()` function is used to find the length or the number of elements in a data structure.
By observing the table, we can see that there are 10 rows or records in the `race` relation, each representing one athlete's result in the 100-meter sprint. Therefore, the correct answer is:
10
So, the correct choice is the second option: 10.