Learn JavaScript from Scratch JavaScript for Everyone - Deleting Object Properties
Interactive Video
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Information Technology (IT), Architecture
•
University
•
Practice Problem
•
Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary limitation of deleting variables in JavaScript compared to other programming languages?
You can only delete object properties in JavaScript.
JavaScript allows deleting both variables and object properties.
JavaScript does not support deletion of any kind.
You can delete entire variables in JavaScript.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when you try to delete an entire object in JavaScript?
The object is completely removed.
The object is partially deleted.
The object is replaced with null.
The object remains unchanged.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using 'use strict' in JavaScript?
To enable more lenient error handling.
To disable all error messages.
To allow deletion of entire variables.
To enforce stricter parsing and error handling.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What error does 'use strict' help identify when trying to delete a variable?
Range error due to out-of-bounds index.
Reference error due to undefined variable.
Type error due to incorrect data type.
Syntax error due to unqualified identifier.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the practical exercise, what should you observe when trying to delete an entire object with 'use strict' enabled?
The object is partially deleted.
A syntax error is thrown.
The object is deleted without any error.
The object is converted to a string.
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