True or False: A Dictionary is a set of unique keys and a collection of values with mapping between each one.

Question

BlackTom AI · Accepted Answer

The statement to evaluate is: 'True or False: A Dictionary is a set of unique keys and a collection of values with mapping between each one.'

Consider what a dictionary represents in common programming contexts: it is a data structure that stores key-value pairs, where each key is unique within the dictionary and maps to a corresponding value. The mapping concept means there is an association between each key and its value, enabling lookups, insertions, and updates.

Why this is true: - Keys are unique identifiers within the dictionary, preventing duplicates for the same key. - Each key is paired with a value, establishing a mapping from that key to its corresponding value. - The collection of values can include duplicates across different keys, but the uniqueness constraint applies to the keys, not the values. - The overall structure supports efficient retrieval by key, which hinges on the mapping relationship between keys and values.

Why the statement is not describing a different data structure: It does not describe a set (which contains unique elements without key-value associations) or a mere list/collection of values without any key-based mapping. The mapping aspect is essential to a dictionary, distinguishing it from other collections.

In summary, the assertion accurately captures the defining features of a dictionary: a collection of unique keys each associated with a value via a mapping relationship.

Combined CS-126 sections - (1257-4967) COMPUTER SCIENCE I (Fall 2025 M16) 002 Module 2 - Midterm Exam | Quiz

True or False: A Dictionary is a set of unique keys and a collection of values with mapping between each one.

查看解析

登录即可查看完整答案

类似问题

Consider the following code segment: fruit = {"Apple": "Green", "Banana": "Yellow"} fruit["Apple"] = "Red" After it executes, what is the value of fruit?

The index of the first item in a dictionary is 0.

What is the number of the first index in a dictionary?

Which method would you use to get all the elements in a dictionary returned as a list of tuples (key, value)?

Question1 In Python, which of the following collections is used to map unique keys to specific values? Select one alternative: tuple dictionary set list ResetMaximum marks: 2 Flag question undefined

Question1 In Python, which of the following collections is used to map unique keys to specific values? Select one alternative: tuple list dictionary set ResetMaximum marks: 2 Flag question undefined

Question1 Which Python data structure has Key-value pairs? Select one alternative: frozenset list set dictionary ResetMaximum marks: 2 Flag question undefined

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单