window, e.g., window.myVar = 'value';
What is the output of console.log(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null
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
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
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process
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(globalVar); if globalVar = 'Hello'; is assigned inside a function without using var, let, or const?
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
Which keyword is used to declare a variable in the global scope?
A). let
B). var
C). const
D). function
How can you avoid global scope pollution?
A). By using local variables
B). By using IIFE (Immediately Invoked Function Expressions)
C). By using modules
D). All of the above