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.
What is the output of typeof window in a browser environment?
A). object
B). undefined
C). function
D). global
Which of the following can be used to prevent accidental modification of global variables?
A). Encapsulation
B). Namespace
C). Strict mode
D). Block scoping
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process
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(window.globalLet); if let globalLet = 'Hello'; is declared in the global scope?
A). Hello
B). undefined
C). error
D). null
What is the output of console.log(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null
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
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
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