题目
G6031: Databases Databases Assessment Part 1
单项选择题
Which of the following is NOT true? Select one answer.
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标准答案
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思路分析
The question asks which statement is NOT true, and only one option is provided for evaluation.
Restating the prompt: Which of the following is NOT true? Select one answer.
Option given: 'In MongoDB, all documents in the same collection must have the same number of fields, but the types of each field......Login to view full explanation登录即可查看完整答案
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类似问题
NoSQL: DB Types From your knowledge of NoSQL databases in the subject, pick the BEST choice for the following scenarios. (HINT: you need to know what type of database is referred to by the products/software below. To avoid confusion, all the products/software in one option are from the same No/SQL database type). 1: For a new competitor to Twitter/X: Storing the social network (follower/following) information of all users and allowing for fast determination of e.g., 'who is a follower of another follower of @TaylorSwift'? 2: For a news website: Storing key info such as title/author/date of a news article, along with the article text itself. Some articles might have different data types than others (e.g., photo journalism vs news report). 3: For a blockchain analysis tool: Storing connected crypto transactions, to allow fraud investigators to rapidly check for patterns of fraud: e.g., is an account transferring money to a recipient who then transfers it to the crypto exchange FTX.
NoSQL B Which of the following types of NoSQL database might be best for the following scenarios: Scenario 1: A retailer’s webapp has 3 pages that customers can view. Each page displays different parts of a customer’s information: 1) Their account details + billing information 2) Their previous purchased items 3) Their bookmarked/favourite items. Which type of nosql database might be most suitable for this? Scenario 2: This same webapp also needs to store images, videos, and gifs for each of the products. Which type of database might be most suitable for this? 1: Scenario 1 2: Scenario 2
NoSQL A Determine whether the following statements are true or false: 1: Aggregate-oriented NoSQL databases are often easier to distribute than a relational database because they bundle relevant data together 2: Aggregate-oriented NoSQL databases are often faster to analyse stored data than a relational database because documents are kept in an unstructured ‘data lake’ which accelerates access speed 3: Aggregate-oriented NoSQL databases are usually more space-efficient for storing the same amount of data because they are ‘schema-on-read’, so the database does not need a schema. 4: A JSON/XML document enables multi-level hierarchy in its information, which allows a document-based database to mimic the structure of an object and thus 'solve' the object-relational-mismatch-problem
Which of the following is NOT true? Select one answer.
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