What is an N-gram? Choose one best answer:

Question

BlackTom AI · Accepted Answer

The question asks: What is an N-gram? Choose one best answer.
Option 1: 'List of N most frequently occurred tokens in a document' — This describes a top-N frequency list, not an N-gram. N-grams focus on sequences, not frequency ranking alone.
Option 2: 'List of N least frequently occurred tokens in a document' — Similarly, this targets infrequent items and does not capture the sequential token grouping that defines N-grams.
Option 3: 'Sequence of N tokens observed in a document' — This is the correct definition: an N-gram is a contiguous sequence of N items (tokens) from a text, capturing local word order and context.
Option 4: 'None of the above' — Since Option 3 accurately defines an N-gram, this option is incorrect.
To reinforce, remember that an N-gram is created by sliding a window of size N over a sequence of tokens, extracting all contiguous N-tuple sequences. This contrasts with frequency-based lists (Options 1 and 2) which do not constrain the items to be consecutive in the original text. The understanding that N-grams are about sequences of tokens, not mere frequencies, confirms Option 3 as the best choice.

SP2025.B69.DAT.562.24 COMPLETE AFTER VIDEO 6: N-grams (Module 2 Quiz #5)

What is an N-gram? Choose one best answer:

查看解析

登录即可查看完整答案

类似问题

By vectorizing text using N-grams, we are able to take the order of words into account, thus preserving more information from the original raw document.

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

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