var, let, or const inside a function?
var, let, or const inside a function, it becomes a global variable.
What is the output of console.log(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null
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(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 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
What is the global object in a browser environment?
A). window
B). global
C). document
D). this
How do you declare a global variable inside a function?
A). Using var
B). Using let
C). Using const
D). Assigning to window
How can you access a global variable inside a function if it has the same name as a local variable?
A). By using the window object
B). By using the global object
C). By using a different name for the global variable
D). By using the this keyword
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
Which keyword is used to declare a variable in the global scope?
A). let
B). var
C). const
D). function