Answer & Solution
let and const in the global scope are not properties of the window object.
console.log(window.globalLet); if let globalLet = 'Hello'; is declared in the global scope?
let and const in the global scope are not properties of the window object.
What happens if you declare a variable without var, let, or const inside a function?
A). It becomes a global variable
B). It becomes a local variable
C). It throws an error
D). It becomes a constant
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 is the output of typeof window in a browser environment?
A). object
B). undefined
C). function
D). global
What is the output of console.log(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null
What is the global object in a browser environment?
A). window
B). global
C). document
D). this
Which of the following can be used to prevent accidental modification of global variables?
A). Encapsulation
B). Namespace
C). Strict mode
D). Block scoping
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
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
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process