InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Point out the wrong statement.(a) The key decision in designing data models for MongoDB applications revolves around the structure of documents and how the application represents relationships between data(b) There are two tools that allow applications to represent these relationships: references and embedded documents(c) When designing data models, always consider the application usage of the data (i.e. queries, updates, and processing of the data) as well as the inherent structure of the data itself(d) All of the mentionedThis question was addressed to me in an international level competition.My question comes from Data Modeling Introduction topic in division Data Models of MongoDB |
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Answer» RIGHT answer is (d) All of the mentioned For explanation I would say: Denormalized data models allow applications to retrieve and manipulate related data in a SINGLE DATABASE operation. |
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| 52. |
In MongoDB, write operations are atomic at the __________ level.(a) collection(b) document(c) row(d) all of the mentionedThis question was posed to me in class test.The origin of the question is Data Modeling Introduction in portion Data Models of MongoDB |
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Answer» RIGHT choice is (b) document To explain I would SAY: No SINGLE write OPERATION can ATOMICALLY affect more than one document or more than one collection. |
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| 53. |
Point out the correct statement.(a) In practice, the documents in a collection share a different structure(b) Data in MongoDB has a flexible schema(c) The key challenge in data modeling is balancing the needs of the application, the performance characteristics of the database engine, and the data retrieval patterns(d) None of the mentionedI have been asked this question in an online interview.This intriguing question comes from Data Modeling Introduction in division Data Models of MongoDB |
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Answer» Right answer is (b) DATA in MongoDB has a flexible schema |
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| 54. |
________ store the relationships between data by including links or references from one document to another.(a) Capped(b) Embedded(c) External(d) ReferencesI got this question in an international level competition.Asked question is from Data Modeling Introduction in chapter Data Models of MongoDB |
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Answer» The correct option is (d) References |
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