Western Governors University (WGU) ICSC2100 C949 Data Structures and Algorithms I Practice Exam

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What type of collections allow for duplicate values?

Sets

Dictionaries

Lists

The correct answer is that lists allow for duplicate values. In a list, elements can be added multiple times, which means the same value can appear more than once. This characteristic is essential in many programming scenarios, such as when the order of elements matters, or when a specific count of a particular value is required in the collection.

For example, in a list of student names, the name "John" can appear multiple times for different students. This feature is useful when you need to maintain an indexed order and allow for repeated entries.

While dictionaries, sets, and tuples have their own unique properties, they either do not support duplicates (like sets) or have constraints on immutability or key uniqueness (like dictionaries). Therefore, lists are the quintessential data structure for scenarios where duplicate values are needed.

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Tuples

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