Answer & Solution
globalThis refers to the global object, which is window. Hence, the output is true.
console.log(globalThis === window); in a browser environment?
globalThis refers to the global object, which is window. Hence, the output is true.
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
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 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
What is the output of typeof window in a browser environment?
A). object
B). undefined
C). function
D). global
What is the purpose of the global object in JavaScript?
A). To store local variables
B). To provide a namespace for global variables and functions
C). To define constants
D). To execute code in strict mode
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
What is the global object in a browser environment?
A). window
B). global
C). document
D). this
What keyword is used to ensure a variable is block-scoped?
A). var
B). global
C). let
D). window
How do you declare a global variable inside a function?
A). Using var
B). Using let
C). Using const
D). Assigning to window
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process