Machine Learning MCQ Questions with answers and solutions Page 39

Q. Which is the most appropriate database for developers requiring huge amount of data?

(A) Database
(B) Datawarehouse
(C) Web databases
(D) Access

💬 Discuss

✅ Correct Answer: (C) Web databases

Explanation: Developers who need to work with really huge amounts of data like to use databases, and the most recent browsers have started to integrate client-side database functionality into their browsers.

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

Q. The localStorage and sessionStorage belongs to

(A) Window object
(B) Element object
(C) Hash object
(D) DOM object

💬 Discuss

✅ Correct Answer: (A) Window object

Explanation: Browsers that implement the “Web Storage” draft specification define two properties on the Window object: localStorage and sessionStorage. Both properties refer to a Storage object—a persistent associative array that maps string keys to string values.

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

Q. What is the main difference between localStorage and sessionStorage?

(A) Lifetime
(B) Scope
(C) Both Lifetime and Scope
(D) None of the mentioned

💬 Discuss

✅ Correct Answer: (C) Both Lifetime and Scope

Explanation: The difference between localStorage and sessionStorage has to do with lifetime and scope: how long the data is saved for and who the data is accessible to.

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

Q. What is the lifetime of the data stored through localStorage?

(A) Permanant
(B) Temporary
(C) Both Permanant and Temporary at times
(D) Cannot store

💬 Discuss

✅ Correct Answer: (A) Permanant

Explanation: Data stored through localStorage is permanent: it does not expire and remains stored on the user’s computer until a web app deletes it or the user asks the browser (through some browser-specific UI) to delete it.

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

Q. Which is the function used to retrieve a value?

(A) get()
(B) retrieve()
(C) getItem()
(D) retrieveItem()

💬 Discuss

✅ Correct Answer: (C) getItem()

Explanation: To retrieve a value, pass the name to getItem().

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

Q. Which is the function used to store a value?

(A) setItem()
(B) set()
(C) storeItem()
(D) store()

💬 Discuss

✅ Correct Answer: (A) setItem()

Explanation: To store a value, pass the name and value to setItem().

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

Q. Which of the following are the features of jQuery?

(A) Efficient query method for finding the set of document elements
(B) Expressive syntax for referring to elements in the document
(C) Useful set of methods for manipulating selected elements
(D) All of the mentioned

💬 Discuss

✅ Correct Answer: (D) All of the mentioned

Explanation: These features are at the heart of jQuery’s power and utility:

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

Q. Which of the following is a single global function defined in the jQuery library?

(A) jQuery()
(B) $()
(C) Queryanalysis()
(D) None of the mentioned

💬 Discuss

✅ Correct Answer: (A) jQuery()

Explanation: The jQuery library defines a single global function named jQuery(). This function is so frequently used that the library also defines the global symbol $ as a shortcut for it.

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

Q. Which of the following is a factory function?

(A) $()
(B) jQuery()
(C) Queryanalysis()
(D) None of the mentioned

💬 Discuss

✅ Correct Answer: (B) jQuery()

Explanation: jQuery() is a factory function rather than a constructor: it returns a newly created object but is not used with the new keyword) jQuery objects define many methods for operating on the sets of elements they represent, and most of this chapter is devoted to explaining those methods.

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

Q. Which is the code that asks for the set of all div elements in a document?

(A) var divs = $(div);
(B) var divs = jQuery("div");
(C) var divs = $("div");
(D) var divs = #("div");

💬 Discuss

✅ Correct Answer: (C) var divs = $("div");

Explanation: The code to ask for the set of all div elements in a document is

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

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