console.log(window.myVar); if var myVar = 'Hello'; is declared outside any function?
var in the global scope, it becomes a property of the window object.
Which keyword is used to declare a variable in the global scope?
A). let
B). var
C). const
D). function
Can a global variable be accessed inside a function?
A). Yes
B). No
C). Only if passed as a parameter
D). Only if defined with var
What is the global object in a browser environment?
A). window
B). global
C). document
D). this
What is the output of typeof window in a browser environment?
A). object
B). undefined
C). function
D). global
What keyword is used to ensure a variable is block-scoped?
A). var
B). global
C). let
D). window
Which statement is true about global variables in JavaScript?
A). They are not accessible inside functions
B). They can be accessed and modified from any part of the code
C). They are constants
D). They can only be read, not modified
What is the output of console.log(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null
What happens if you declare a variable inside a function with the same name as a global variable?
A). It creates a new local variable
B). It throws an error
C). It modifies the global variable
D). It assigns the global variable to null
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process
Which of the following methods can help in avoiding global variables?
A). Using functions to encapsulate code
B). Using objects to namespace code
C). Using ES6 modules
D). All of the above