Answer & Solution
Answer: Option B
Solution:
Global variables can be accessed and modified from any part of the code.
Q
Which statement is true about global variables in JavaScript?
Related Questions on Average
What is the output of console.log(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null
What will be the output of console.log(window.myVar); if var myVar = 'Hello'; is declared outside any function?
A). Hello
B). undefined
C). error
D). null
What is the purpose of the global object in JavaScript?
A). To store local variables
B). To provide a namespace for global variables and functions
C). To define constants
D). To execute code in strict mode
Which keyword is used to declare a variable in the global scope?
A). let
B). var
C). const
D). function
What keyword is used to ensure a variable is block-scoped?
A). var
B). global
C). let
D). window
Can global variables lead to name collisions in large codebases?
A). Yes
B). No
C). Only if not managed properly
D). Only in strict mode
What is the output of console.log(globalVar); if globalVar = 'Hello'; is assigned inside a function without using var, let, or const?
A). Hello
B). undefined
C). error
D). null
Which of the following can create a global variable?
A). var
B). let
C). const
D). All of the above
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process
How can you avoid global scope pollution?
A). By using local variables
B). By using IIFE (Immediately Invoked Function Expressions)
C). By using modules
D). All of the above