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R for Data Analytics MCQ - Advanced R Programming

16 Which function can transform data from wide to long format in base R?

reshape() can convert data between wide and long representations.

17 Why is set.seed() commonly used before operations involving random numbers?

set.seed() initializes the random number generator so the same random sequence can be reproduced.

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Question:

Why is set.seed() commonly used before operations involving random numbers?

A. To increase randomness
B. To make random results reproducible
C. To remove duplicated values
D. To convert numbers to integers

Correct answer: B

Explanation:

set.seed() initializes the random number generator so the same random sequence can be reproduced.

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