54 + Interview Questions in Data Models in Mongodb Page 1 InterviewSolution

1.	The ______ factor is a constant and known property of the currency.(a) rank(b) scale(c) high(d) none of the mentionedThis question was addressed to me in an online interview.I want to ask this question from Model Monetary and Time Data in portion Data Models of MongoDB
Answer» The correct answer is (b) SCALE For explanation I WOULD say: Applications can determine the scale FACTOR from the currency.

Discussion

2.	Use of the approximation field for the query and sort operations requires that applications perform _______ side post-processing.(a) client(b) server(c) application(d) none of the mentionedI had been asked this question during an online interview.My enquiry is from Model Monetary and Time Data in division Data Models of MongoDB
Answer» CORRECT answer is (a) client To explain I would say: Client side processing is USED to DECODE the non-numeric representation of the exact value and then FILTER out the returned documents based on the exact monetary value.

Discussion

3.	Which of the following is used to handle arbitrary or unforeseen number of precision?(a) Exact(b) Accurate(c) Ambiguity(d) None of the mentionedI have been asked this question during a job interview.This key question is from Model Monetary and Time Data in portion Data Models of MongoDB
Answer» Correct OPTION is (c) Ambiguity The best I can explain: If there is no need to perform server-side arithmetic on monetary data, MODELING monetary data USING the arbitrary precision model may be suitable.

Discussion

4.	MongoDB stores times in _____ by default, and will convert any local time representations into this form.(a) UTC(b) GMT(c) IST(d) None of the mentionedThis question was addressed to me during an interview.My question is taken from Model Monetary and Time Data in section Data Models of MongoDB
Answer» Right answer is (a) UTC Best EXPLANATION: Applications that must operate or report on some unmodified local time value MAY STORE the time zone alongside the UTC timestamp, and COMPUTE the original local time in their application logic.

Discussion

5.	Point out the wrong statement.(a) If you need to query the database for exact, mathematically valid matches, use Exact Precision(b) If you regularly need to perform server-side arithmetic on monetary data, the exact precision model may be appropriate(c) If you need to query the database for exact, mathematically valid matches, use Ambiguity Precision(d) None of the mentionedThis question was posed to me in an interview for job.I'd like to ask this question from Model Monetary and Time Data topic in division Data Models of MongoDB
Answer» The CORRECT option is (c) If you need to query the database for EXACT, mathematically VALID matches, use Ambiguity PRECISION For explanation I would say: If you need to be able to do server-side arithmetic, e.g., $inc, $mul, and AGGREGATION framework arithmetic, use Exact Precision.

Discussion

6.	__________ precision multiplies the monetary value by a power of 10.(a) Exact(b) Accurate(c) Ambiguity(d) None of the mentionedI got this question in an online quiz.I want to ask this question from Model Monetary and Time Data topic in portion Data Models of MongoDB
Answer» The correct option is (a) Exact Best explanation: MongoDB stores NUMERIC DATA as either IEEE 754 standard 64-bit floating POINT NUMBERS or as 32-bit or 64-bit signed integers.

Discussion

7.	Which of the following precision uses two values for the field?(a) Exact(b) Accurate(c) Ambiguity(d) None of the mentionedThe question was asked in unit test.My doubt stems from Model Monetary and Time Data in section Data Models of MongoDB
Answer» The correct ANSWER is (c) Ambiguity Explanation: Arbitrary PRECISION which uses two FIELDS for the value: one field to store the exact monetary value as a non-numeric and ANOTHER field to store a floating point approximation of the value.

Discussion

8.	Point out the correct statement.(a) Applications that handle monetary data often require capturing fractional units of currency(b) Applications that handle time data often require capturing fractional units of currency(c) Applications that handle temporal and spatial data often require capturing fractional units of currency(d) All of the mentionedI have been asked this question in a job interview.Query is from Model Monetary and Time Data topic in section Data Models of MongoDB
Answer» The correct OPTION is (a) Applications that handle monetary data often require capturing FRACTIONAL units of currency Easy explanation: Some fractional NUMERIC quantities, such as ONE third and one tenth, have no exact representation in binary floating POINT numbers.

Discussion

9.	Which of the following is related to the parsing of document for root?(a) Stemming(b) Synonyms(c) Ranking(d) None of the mentionedThe question was posed to me in an online quiz.This question is from Model Data for Atomic operations topic in division Data Models of MongoDB
Answer» The CORRECT answer is (a) Stemming Best explanation: KEYWORD queries in MongoDB can not parse KEYWORDS for root or RELATED words.

Discussion

10.	________ indexes can include any field whose value is a string or an array of string elements.(a) text(b) string(c) char(d) none of the mentionedI had been asked this question in quiz.My question comes from Model Data for Atomic operations in chapter Data Models of MongoDB
Answer» The correct OPTION is (a) text The EXPLANATION: MongoDB provides text indexes to SUPPORT text SEARCH of string content in DOCUMENTS of a collection.

Discussion

11.	Which of the following is related to document that do not provide a way to weight results?(a) Stemming(b) Synonyms(c) Ranking(d) None of the mentionedThe question was asked in an international level competition.The above asked question is from Model Data for Atomic operations topic in section Data Models of MongoDB
Answer» The CORRECT option is (C) Ranking Best explanation: The keyword look ups described in this document do not PROVIDE a way to WEIGHT results.

Discussion

12.	Which of the following is related to document that provide support for synonym or related queries in the application layer?(a) Stemming(b) Synonyms(c) Ranking(d) None of the mentionedI had been asked this question in a national level competition.Enquiry is from Model Data for Atomic operations topic in portion Data Models of MongoDB
Answer» Right OPTION is (b) Synonyms The best I can explain: MongoDB can SUPPORT keyword SEARCHES using SPECIFIC data models and multi-key indexes.

Discussion

13.	Point out the correct statement.(a) An array with a large number of elements will incur greater indexing costs on insertion(b) An array with a large number of elements will incur smaller indexing costs on updates(c) An array with a small number of elements will incur greater indexing costs on insertion(d) None of the mentionedI got this question in an interview for job.Question is taken from Model Data for Atomic operations in section Data Models of MongoDB
Answer» Correct ANSWER is (a) An ARRAY with a large number of elements will INCUR greater indexing costs on insertion The best I can explain: An array with a large number of elements, such as one with SEVERAL hundred or thousands of KEYWORDS will incur greater indexing costs on insertion.

Discussion

14.	___________ bulk indexes may be more efficient for some kinds of content and workloads in real time.(a) Synchronous(b) Asynchronous(c) Unique(d) None of the mentionedI have been asked this question in semester exam.Origin of the question is Model Data for Atomic operations topic in division Data Models of MongoDB
Answer» Correct answer is (b) Asynchronous To elaborate: MongoDB can SUPPORT keyword searches using SPECIFIC DATA models and multi-key INDEXES;

Discussion

15.	Which of the following operations are atomic on document level?(a) update(b) remove(c) findAndModify(d) all of the mentionedThis question was posed to me in unit test.Asked question is from Model Data for Atomic operations topic in portion Data Models of MongoDB
Answer» Right ANSWER is (d) all of the mentioned Explanation: In MongoDB, WRITE operations, e.g. db.collection.update(), db.collection.findAndModify(), db.collection.remove(), are atomic on the LEVEL of a single DOCUMENT.

Discussion

16.	Point out the correct statement.(a) $regex is used for regular expression pattern matches(b) $like is used for regular expression pattern matches(c) $reg is used for regular expression pattern matches(d) All of the mentionedI had been asked this question during an interview.Query is from Model Data for Atomic operations in division Data Models of MongoDB
Answer» Correct answer is (a) $regex is USED for REGULAR expression PATTERN matches Explanation: If your application needs to perform queries on the content of a field that holds text you can perform EXACT matches on the text.

Discussion

17.	Which of the following pattern is best for static trees that do not change?(a) Child(b) Parent(c) Root(d) None of the mentionedThe question was asked in my homework.Asked question is from Model Data for Atomic operations topic in division Data Models of MongoDB
Answer» CORRECT answer is (d) None of the mentioned The BEST I can explain: The Nested Sets PATTERN provides a fast and efficient solution for finding subtrees but is inefficient for modifying the tree STRUCTURE.

Discussion

18.	The Array of Ancestors pattern is slightly slower than the ________________ pattern.(a) Materialized Paths(b) Array of Ancestors(c) Nested Sets(d) None of the mentionedThis question was posed to me in quiz.My doubt stems from Model Tree Structures in portion Data Models of MongoDB
Answer» The CORRECT answer is (a) Materialized Paths For explanation I would say: The Array of Ancestors pattern provides a FAST and efficient solution to find the DESCENDANTS and the ancestors of a node by CREATING an index on the elements of the ancestors field.

Discussion

19.	The ____________ pattern identifies each node in the tree as stops in a round-trip traversal of the tree.(a) Materialized Paths(b) Array of Ancestors(c) Nested Sets(d) None of the mentionedThis question was addressed to me by my college director while I was bunking the class.My question is from Model Tree Structures in portion Data Models of MongoDB
Answer» The correct choice is (C) NESTED Sets To elaborate: The Nested Sets pattern stores each tree node in a document; in addition to the tree node, document stores the id of node’s PARENT, the node’s initial STOP in the left field, and its return stop in the RIGHT field.

Discussion

20.	Which of the following pattern is more straightforward to use?(a) Materialized Paths(b) Array of Ancestors(c) Nested Sets(d) None of the mentionedI got this question in unit test.I'm obligated to ask this question of Model Tree Structures topic in portion Data Models of MongoDB
Answer» The CORRECT answer is (b) Array of Ancestors For explanation I would say: The Array of Ancestors pattern STORES each tree node in a document; in ADDITION to the tree node, document stores in an array the ID(s) of the node’s ancestors or path.

Discussion

21.	Which of the following pattern may provide a suitable solution for storing graphs?(a) Child(b) Parent(c) Root(d) None of the mentionedI got this question in an interview for job.Asked question is from Model Tree Structures in portion Data Models of MongoDB
Answer» The CORRECT OPTION is (a) Child The BEST explanation: Node may have MULTIPLE PARENTS for Child Parents.

Discussion

22.	Point out the wrong statement.(a) You cannot query for a node in the children field to find its parent node only(b) You can query for a node in the children field to find its parent node as well as its siblings(c) You can query for a node in the children field to find its siblings only(d) None of the mentionedI got this question in my homework.My question is from Model Tree Structures in section Data Models of MongoDB
Answer» CORRECT option is (b) You can query for a NODE in the children field to find its parent node as WELL as its siblings The explanation is: The Child References pattern PROVIDES a suitable solution to tree storage as long as no operations on subtrees are NECESSARY.

Discussion

23.	The _________ References pattern stores each tree node in array the id(s) of the node’s children.(a) Child(b) Parent(c) Root(d) None of the mentionedI got this question during an online interview.This intriguing question originated from Model Tree Structures topic in chapter Data Models of MongoDB
Answer» The correct answer is (a) Child Explanation: In addition to the TREE NODE, document stores in an ARRAY the id(s) of the node’s children.

Discussion

24.	The ________ Links pattern provides a simple solution to tree storage but requires multiple queries to retrieve subtrees.(a) Child(b) Parent(c) Root(d) All of the mentionedThis question was addressed to me in class test.This question is from Model Tree Structures in chapter Data Models of MongoDB
Answer» Right answer is (b) Parent Best explanation: You can QUERY by the parent field to FIND its immediate CHILDREN NODES.

Discussion

25.	Point out the correct statement.(a) The query to retrieve the parent of a node is fast and straightforward(b) The query to retrieve the parent of a node is slow and straightforward(c) The query to retrieve the parent of a node is slow and complex(d) All of the mentionedThe question was posed to me during an interview.I'd like to ask this question from Model Tree Structures topic in section Data Models of MongoDB
Answer» RIGHT option is (a) The query to RETRIEVE the parent of a node is fast and straightforward The best I can explain: You can CREATE an INDEX on the field to enable fast SEARCH by the parent node.

Discussion

26.	The ________ References pattern stores each tree node in a document; in addition to the tree node, the document stores the id of the node’s parent.(a) Child(b) Parent(c) Root(d) None of the mentionedThe question was asked in an interview for internship.This interesting question is from Model Tree Structures in division Data Models of MongoDB
Answer» The correct choice is (b) Parent To explain: Data MODEL that DESCRIBES a tree-like structure in MongoDB documents by STORING references to “parent” NODES in children nodes.

Discussion

27.	The ___________ JavaScript shell and the MongoDB language drivers translate between BSON and the language-specific document representation.(a) mongod(b) mongo(c) json(d) none of the mentionedThis question was addressed to me by my school principal while I was bunking the class.My query is from Data Model Examples and Patterns topic in division Data Models of MongoDB
Answer» Correct CHOICE is (b) mongo Explanation: MongoDB stores DOCUMENTS on disk in the BSON SERIALIZATION FORMAT. BSON is a binary representation of JSON documents, though it contains more DATA types than JSON.

Discussion

28.	The files_id field contains the _id of the chunk’s __________ document.(a) parent(b) child(c) top(d) none of the mentionedThe question was asked in final exam.My question is from Data Modeling Concepts topic in chapter Data Models of MongoDB
Answer» RIGHT ANSWER is (a) parent To explain: GRIDFS uses a UNIQUE, compound index on the chunks collection for the files_id and n FIELDS.

Discussion

29.	Which of the following checks and repairs errors and inconsistencies in data storage?(a) repairDatabase(b) repairedDatabase(c) recoverDatabase(d) all of the mentionedThis question was addressed to me in quiz.Origin of the question is Data Modeling Concepts in portion Data Models of MongoDB
Answer» The correct ANSWER is (a) repairDatabase To ELABORATE: repairDatabase is ANALOGOUS to an fsck command for FILE systems.

Discussion

30.	___________is the _id is of the data type chosen for the original document in files collections.(a) files._id(b) file._id(c) fileobj._id(d) none of the mentionedThis question was addressed to me in exam.My question is from Data Modeling Concepts topic in portion Data Models of MongoDB
Answer» RIGHT answer is (a) files._id Easy explanation: The DEFAULT type for MONGODB documents is BSON ObjectId.

Discussion

31.	Point out the wrong statement.(a) Client libraries provide a convenient, injection free, process to build these objects(b) MongoDB represents queries as BSON objects(c) Field names in MongoDB’s query language have semantic meaning(d) All of the mentionedThe question was posed to me in quiz.This intriguing question comes from Data Modeling Concepts topic in section Data Models of MongoDB
Answer» Correct answer is (d) All of the mentioned The explanation: If you need to use db.eval() with USER supplied VALUES, you can either use a CodeWScope or you can SUPPLY extra arguments to your function.

Discussion

32.	Which of the collection in GridFS stores the binary chunks?(a) chunks(b) files(c) data(d) logThe question was asked in an interview for internship.Question is taken from Data Modeling Concepts in division Data Models of MongoDB
Answer» The correct CHOICE is (a) chunks To elaborate: GRIDFS places the COLLECTIONS in a COMMON bucket by prefixing each with the bucket name.

Discussion

33.	The default chunk size is changed from 256k to 255k in which version?(a) 3.0(b) 2.4.9(c) 2.4.10(d) None of the mentionedThis question was posed to me by my school teacher while I was bunking the class.The doubt is from Data Modeling Concepts in chapter Data Models of MongoDB
Answer» RIGHT choice is (B) 2.4.9 Explanation: The use of the term chunks in the CONTEXT of GRIDFS is not related to the use of the term chunks in the context of SHARDING.

Discussion

34.	Point out the wrong statement.(a) By default GridFS limits chunk size to 255k(b) GridFS is useful only for storing files that exceed 16MB(c) When you query a GridFS store for a file, the driver or client will reassemble the chunks as needed(d) All of the mentionedI have been asked this question in exam.The doubt is from Data Modeling Concepts topic in section Data Models of MongoDB
Answer» RIGHT answer is (b) GridFS is useful only for storing files that exceed 16MB To EXPLAIN I would SAY: GridFS is useful not only for storing files that exceed 16MB but also for storing any files for which you want to access without having to LOAD the ENTIRE file into memory.

Discussion

35.	How many does collections GridFS use to store files?(a) 1(b) 2(c) 3(d) 4I had been asked this question in an internship interview.Asked question is from Data Modeling Concepts in portion Data Models of MongoDB
Answer» Right answer is (B) 2 The explanation is: ONE collection STORES the file CHUNKS, and the other stores file METADATA.

Discussion

36.	_______________ is a specification for storing and retrieving files that exceed the BSON-document size limit of 16MB.(a) DataFS(b) GridFS(c) ReadFS(d) None of the mentionedI have been asked this question in my homework.I'd like to ask this question from Data Modeling Concepts topic in portion Data Models of MongoDB
Answer» Right answer is (b) GridFS The explanation: INSTEAD of STORING a file in a SINGLE document, GridFS DIVIDES a file into parts, or chunks.

Discussion

37.	To get the current number of namespaces in the mongo shell, use ________________(a) db.system.namespaces.countc()(b) db.system.namespaces.count(*)(c) db.system.namespaces.count()(d) all of the mentionedI got this question during an interview for a job.My question is from Data Modeling Concepts in portion Data Models of MongoDB
Answer» Correct choice is (c) db.system.namespaces.count() EASY explanation: The limit on the number of namespaces DEPEND on the .ns SIZE.

Discussion

38.	The __________ feature of collections expires documents after a period of time.(a) TEL(b) TTL(c) TPL(d) None of the mentionedI have been asked this question in an interview for job.Enquiry is from Data Modeling Concepts topic in portion Data Models of MongoDB
Answer» Correct option is (b) TTL The best explanation: Consider using the TTL feature if your APPLICATION requires some data to persist in the DATABASE for a LIMITED period of TIME.

Discussion

39.	MongoDB using the mmapv1 storage engine has limits on the number of __________(a) namespaces(b) collections(c) documents(d) none of the mentionedI had been asked this question in an international level competition.I'm obligated to ask this question of Data Modeling Concepts in portion Data Models of MongoDB
Answer» Right OPTION is (a) namespaces To explain I WOULD SAY: The namespace file defaults to 16 MB.

Discussion

40.	To interact with embedded documents, use ___________ notation to “reach into” embedded documents.(a) period(b) dot(c) comma(d) colonI got this question by my school teacher while I was bunking the class.My query is from Data Modeling Concepts in division Data Models of MongoDB
Answer» RIGHT CHOICE is (b) dot To explain: References PROVIDES more FLEXIBILITY than embedding.

Discussion

41.	Normalized data models describe relationships using ___________ between documents.(a) relativeness(b) references(c) evaluation(d) none of the mentionedThis question was addressed to me in class test.The query is from Data Modeling Concepts topic in portion Data Models of MongoDB
Answer» The CORRECT choice is (B) references The explanation is: NORMALIZED data MODELS can require more ROUND trips to the server.

Discussion

42.	Point out the wrong statement.(a) Embedded data models make it possible to update related data in a single atomic write operation(b) Embedding related data in documents may lead to situations where documents grow after creation(c) With the MMAPv1 storage engine, document growth can impact write performance and lead to data fragmentation(d) All of the mentionedI have been asked this question in an online interview.This key question is from Data Modeling Concepts in chapter Data Models of MongoDB
Answer» RIGHT answer is (d) All of the mentioned Easiest explanation: In version 3.0.0, MongoDB USES Power of 2 SIZED Allocations as the default allocation strategy for MMAPV1 in order to account for document growth, minimizing the likelihood of data FRAGMENTATION.

Discussion

43.	Embedded data model is used when you have _________ relationships between entities.(a) contains(b) isa(c) inheritance(d) all of the mentionedI had been asked this question in unit test.Enquiry is from Data Modeling Concepts in portion Data Models of MongoDB
Answer» Right OPTION is (a) contains The explanation is: EMBEDDING provides BETTER performance for read operations.

Discussion

44.	With MongoDB 3.0.0, the default use of the Power of _________ Allocations minimizes the occurrences of re-allocations as well as allows for the effective reuse of the freed record space.(a) 2 Sized(b) 3 Sized(c) 4 Sized(d) 5 SizedThe question was posed to me by my school teacher while I was bunking the class.My question is from Data Modeling Introduction topic in portion Data Models of MongoDB
Answer» RIGHT answer is (a) 2 Sized Explanation: When USING MMAPv1, if your APPLICATIONS require updates that will frequently cause document growth to exceeds the current power of 2 ALLOCATION, you may want to refactor your data model to USE references between data in distinct documents rather than a denormalized data model.

Discussion

45.	Point out the correct statement.(a) With MongoDB, you cannot embed related data in a single structure or document(b) The key consideration for the structure of your documents is the decision to embed or to use references(c) Reference schema is generally known as “denormalized” models(d) None of the mentionedThe question was posed to me in an interview for job.My question is taken from Data Modeling Concepts topic in division Data Models of MongoDB
Answer» Correct ANSWER is (b) The KEY consideration for the structure of your documents is the decision to embed or to use references To elaborate: Effective DATA models support your APPLICATION needs.

Discussion

46.	___________ strategy is used to explicitly avoid document growth.(a) deallocation(b) allocation(c) pre-allocation(d) none of the mentionedThe question was posed to me in semester exam.I need to ask this question from Data Modeling Introduction topic in division Data Models of MongoDB
Answer» Correct answer is (C) pre-allocation To ELABORATE: A data MODEL that embeds related data in a single DOCUMENT facilitates atomic operations.

Discussion

47.	___________ data models allow applications to store related pieces of information in the same database record.(a) Reference(b) Embedded(c) External(d) None of the mentionedThis question was addressed to me in an online interview.The query is from Data Modeling Concepts in portion Data Models of MongoDB
Answer» Right choice is (B) Embedded The best I can explain: As a result, applications may NEED to issue fewer queries and updates to complete common OPERATIONS.

Discussion

48.	For the __________ storage engine, if the document size exceeds the allocated space for that document, MongoDB relocates the document on disk.(a) MAPv1(b) MAPv2(c) MAPv3(d) MAPv4I have been asked this question in an online quiz.The question is from Data Modeling Introduction topic in portion Data Models of MongoDB
Answer» CORRECT ANSWER is (C) MAPv3 To explain I WOULD say: Normalizing the data would split the data across multiple collections and would require multiple write operations that are not ATOMIC collectively.

Discussion

49.	A ____________ data model with embedded data combines all related data for a represented entity in a single document.(a) normalized(b) denormalized(c) non relational(d) relationalI have been asked this question by my school teacher while I was bunking the class.My question comes from Data Modeling Introduction in portion Data Models of MongoDB
Answer» Right choice is (b) denormalized For explanation: This FACILITATES ATOMIC write operations since a SINGLE write operation can insert or update the DATA for an entity.

Discussion

50.	______________ documents capture relationships between data by storing related data in a single document structure.(a) Capped(b) Embedded(c) External(d) InternalThis question was posed to me in exam.Enquiry is from Data Modeling Introduction topic in division Data Models of MongoDB
Answer» Correct ANSWER is (b) Embedded For EXPLANATION I would say: MONGODB documents make it possible to EMBED document structures in a field or array within a document.

Discussion

Explore topic-wise InterviewSolutions in .

The ______ factor is a constant and known property of the currency.(a) rank(b) scale(c) high(d) none of the mentionedThis question was addressed to me in an online interview.I want to ask this question from Model Monetary and Time Data in portion Data Models of MongoDB

Which of the following is used to handle arbitrary or unforeseen number of precision?(a) Exact(b) Accurate(c) Ambiguity(d) None of the mentionedI have been asked this question during a job interview.This key question is from Model Monetary and Time Data in portion Data Models of MongoDB

MongoDB stores times in _____ by default, and will convert any local time representations into this form.(a) UTC(b) GMT(c) IST(d) None of the mentionedThis question was addressed to me during an interview.My question is taken from Model Monetary and Time Data in section Data Models of MongoDB

__________ precision multiplies the monetary value by a power of 10.(a) Exact(b) Accurate(c) Ambiguity(d) None of the mentionedI got this question in an online quiz.I want to ask this question from Model Monetary and Time Data topic in portion Data Models of MongoDB

Which of the following precision uses two values for the field?(a) Exact(b) Accurate(c) Ambiguity(d) None of the mentionedThe question was asked in unit test.My doubt stems from Model Monetary and Time Data in section Data Models of MongoDB

Which of the following is related to the parsing of document for root?(a) Stemming(b) Synonyms(c) Ranking(d) None of the mentionedThe question was posed to me in an online quiz.This question is from Model Data for Atomic operations topic in division Data Models of MongoDB

________ indexes can include any field whose value is a string or an array of string elements.(a) text(b) string(c) char(d) none of the mentionedI had been asked this question in quiz.My question comes from Model Data for Atomic operations in chapter Data Models of MongoDB

Which of the following operations are atomic on document level?(a) update(b) remove(c) findAndModify(d) all of the mentionedThis question was posed to me in unit test.Asked question is from Model Data for Atomic operations topic in portion Data Models of MongoDB

Which of the following pattern is best for static trees that do not change?(a) Child(b) Parent(c) Root(d) None of the mentionedThe question was asked in my homework.Asked question is from Model Data for Atomic operations topic in division Data Models of MongoDB

The Array of Ancestors pattern is slightly slower than the ________________ pattern.(a) Materialized Paths(b) Array of Ancestors(c) Nested Sets(d) None of the mentionedThis question was posed to me in quiz.My doubt stems from Model Tree Structures in portion Data Models of MongoDB

Which of the following pattern is more straightforward to use?(a) Materialized Paths(b) Array of Ancestors(c) Nested Sets(d) None of the mentionedI got this question in unit test.I'm obligated to ask this question of Model Tree Structures topic in portion Data Models of MongoDB

Which of the following pattern may provide a suitable solution for storing graphs?(a) Child(b) Parent(c) Root(d) None of the mentionedI got this question in an interview for job.Asked question is from Model Tree Structures in portion Data Models of MongoDB

The ________ Links pattern provides a simple solution to tree storage but requires multiple queries to retrieve subtrees.(a) Child(b) Parent(c) Root(d) All of the mentionedThis question was addressed to me in class test.This question is from Model Tree Structures in chapter Data Models of MongoDB

The files_id field contains the _id of the chunk’s __________ document.(a) parent(b) child(c) top(d) none of the mentionedThe question was asked in final exam.My question is from Data Modeling Concepts topic in chapter Data Models of MongoDB

Which of the following checks and repairs errors and inconsistencies in data storage?(a) repairDatabase(b) repairedDatabase(c) recoverDatabase(d) all of the mentionedThis question was addressed to me in quiz.Origin of the question is Data Modeling Concepts in portion Data Models of MongoDB

___________is the _id is of the data type chosen for the original document in files collections.(a) files._id(b) file._id(c) fileobj._id(d) none of the mentionedThis question was addressed to me in exam.My question is from Data Modeling Concepts topic in portion Data Models of MongoDB

Which of the collection in GridFS stores the binary chunks?(a) chunks(b) files(c) data(d) logThe question was asked in an interview for internship.Question is taken from Data Modeling Concepts in division Data Models of MongoDB

The default chunk size is changed from 256k to 255k in which version?(a) 3.0(b) 2.4.9(c) 2.4.10(d) None of the mentionedThis question was posed to me by my school teacher while I was bunking the class.The doubt is from Data Modeling Concepts in chapter Data Models of MongoDB

How many does collections GridFS use to store files?(a) 1(b) 2(c) 3(d) 4I had been asked this question in an internship interview.Asked question is from Data Modeling Concepts in portion Data Models of MongoDB

The __________ feature of collections expires documents after a period of time.(a) TEL(b) TTL(c) TPL(d) None of the mentionedI have been asked this question in an interview for job.Enquiry is from Data Modeling Concepts topic in portion Data Models of MongoDB

To interact with embedded documents, use ___________ notation to “reach into” embedded documents.(a) period(b) dot(c) comma(d) colonI got this question by my school teacher while I was bunking the class.My query is from Data Modeling Concepts in division Data Models of MongoDB

Normalized data models describe relationships using ___________ between documents.(a) relativeness(b) references(c) evaluation(d) none of the mentionedThis question was addressed to me in class test.The query is from Data Modeling Concepts topic in portion Data Models of MongoDB

Embedded data model is used when you have _________ relationships between entities.(a) contains(b) isa(c) inheritance(d) all of the mentionedI had been asked this question in unit test.Enquiry is from Data Modeling Concepts in portion Data Models of MongoDB

___________ strategy is used to explicitly avoid document growth.(a) deallocation(b) allocation(c) pre-allocation(d) none of the mentionedThe question was posed to me in semester exam.I need to ask this question from Data Modeling Introduction topic in division Data Models of MongoDB

______________ documents capture relationships between data by storing related data in a single document structure.(a) Capped(b) Embedded(c) External(d) InternalThis question was posed to me in exam.Enquiry is from Data Modeling Introduction topic in division Data Models of MongoDB