Machine Learning MCQ Questions with answers and solutions Page 38

Q. A key path is defined as

(A) A url that directs to the value
(B) A value that is similar to hash table
(C) A value that tells the database how to extract an object’s key from the object
(D) None of the mentioned

💬 Discuss

✅ Correct Answer: (C) A value that tells the database how to extract an object’s key from the object

Explanation: A key path is defined as a value that tells the database how to extract an object’s key from the object.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. How does IndexedDB provide atomicity?

(A) Grouping among the data
(B) Grouping within a transaction
(C) Grouping the data
(D) None of the mentioned

💬 Discuss

✅ Correct Answer: (B) Grouping within a transaction

Explanation: IndexedDB provides atomicity guarantees: queries and updates to the database are grouped within a transaction so that they all succeed together or all fail together and never leave the database in an undefined partially updated state.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. Which of the following is a feature of the IndexedDB API?

(A) Simplifies the transaction management
(B) Need not manage the transaction at all
(C) Enhances the storage
(D) None of the mentioned

💬 Discuss

✅ Correct Answer: (A) Simplifies the transaction management

Explanation: One of the convenient feature of the IndexedDB API is that it simplifies the transaction management.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. What is the alternate way to search in an IndexedDB API?

(A) Key
(B) Address
(C) Indexes
(D) All of the mentioned

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✅ Correct Answer: (C) Indexes

Explanation: In addition to retrieving objects from an object store by their primary key value, you may want to be able to search based on the value of other properties in the object. In order to be able to do this, you can define any number of indexes on the object store.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. Which is the function used to look up an object?

(A) put()
(B) set()
(C) get()
(D) look()

💬 Discuss

✅ Correct Answer: (C) get()

Explanation: You look up an object by calling the get() method of the object store or store a new object by calling put().

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. Which is the method to look up the objects for a range of keys?

(A) lookRange()
(B) openCursor()
(C) lookall()
(D) None of the mentioned

💬 Discuss

✅ Correct Answer: (B) openCursor()

Explanation: If you want to look up the objects for a range of keys, you create an IDBRange object and pass it to the openCursor() method of the object store.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. Which are the forms of client-side storage?

(A) Web Databases
(B) FileSystem API
(C) Offline Web Applications
(D) All of the mentioned

💬 Discuss

✅ Correct Answer: (D) All of the mentioned

Explanation: The various forms of client-side storage are web databases, filesystem API, Offline web applications and cookies.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. Which is the storage that allows the caching of web pages and their associated resources?

(A) Web Databases
(B) FileSystem API
(C) Offline Web Applications
(D) All of the mentioned

💬 Discuss

✅ Correct Answer: (C) Offline Web Applications

Explanation: HTML5 defines an “Offline Web Applications” API that allows the caching of web pages and their associated resources (scripts, CSS files, images, and so on). This is client-side storage for web applications themselves rather than just their data, and it allows web apps to install themselves so that they are available even when there is no connection to the Internet.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. Which is the Microsoft’s own proprietary client-side storage?

(A) IE User Data
(B) Offline Web Applications
(C) Cookies
(D) All of the mentioned

💬 Discuss

✅ Correct Answer: (A) IE User Data

Explanation: Microsoft implements its own proprietary client-side storage mechanism, known as “userData,” in IE5 and later. userData enables the storage of medium amounts of string data and can be used as an alternative to Web Storage in versions of IE before IE8.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

Q. Which object supports Filesystem API?

(A) Element
(B) File
(C) Window
(D) DOM

💬 Discuss

✅ Correct Answer: (B) File

Explanation: The File object allows user-selected files to be uploaded through an XMLHttpRequest.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:51 pm in Machine Learning

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