Learn JavaScript from Scratch JavaScript for Everyone - Storing Data in Variables
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Information Technology (IT), Architecture, Social Studies
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University
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Practice Problem
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using an external JavaScript file in an HTML document?
To define the structure of the HTML document
To store images used in the webpage
To separate JavaScript code from HTML for better organization
To style the HTML elements
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it beneficial to use variables instead of directly writing values multiple times in JavaScript?
It makes the code run faster
It reduces the file size
It allows for easier updates if the value changes
It prevents syntax errors
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a common naming convention for variables in JavaScript?
snake_case
PascalCase
camelCase
kebab-case
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the shortcut for copying a line in most code editors?
Ctrl + X
Ctrl + C, Ctrl + V
Ctrl + A
Ctrl + Z
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the assignment operator '=' do in JavaScript?
Compares two values
Assigns a value to a variable
Concatenates two strings
Declares a new function
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true about strings in JavaScript?
Strings must start and end with the same type of quote
Strings can only contain letters
Strings are not stored in memory
Strings cannot contain numbers
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of using quotes or apostrophes in JavaScript strings?
They are used to create functions
They are used to declare variables
They are used to comment out code
They define the start and end of a string
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