console.log(globalVar); if globalVar = 'Hello'; is assigned inside a function without using var, let, or const?
var, let, or const, globalVar becomes a global variable and is accessible anywhere.
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
Which of the following can create a global variable?
A). var
B). let
C). const
D). All of the above
What is the output of console.log(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null
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 console.log(window.globalLet); if let globalLet = 'Hello'; is declared in the global scope?
A). Hello
B). undefined
C). error
D). null
Which keyword is used to declare a variable in the global scope?
A). let
B). var
C). const
D). function
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
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process