What does the `include?` method do when used with strings in Ruby?
A. Checks if a substring exists in the string
B. Checks if a character exists in the string
C. Checks if the string includes another string
D. Error
Answer: Option C
Related Questions on Arrays, Hashes and Strings in Ruby
Which method in Ruby is used to add an element to the end of an array?
A. push
B. pop
C. append
D. insert
What will array.size return in Ruby, if array = [1, 2, 3, 4, 5]?
A. 5
B. 4
C. [1, 2, 3, 4, 5]
D. "array"
Which method is used to access the value associated with a specific key in a hash in Ruby?
A. access
B. get
C. fetch
D. value

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