Answer & Solution
Answer: Option B
Solution:
Global variables can be accessed and modified from any part of the code.
Q
Which statement is true about global variables in JavaScript?
Related Questions on Average
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
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
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 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
What keyword is used to ensure a variable is block-scoped?
A). var
B). global
C). let
D). window
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
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(globalThis === window); in a browser environment?
A). 1
B). 0
C). undefined
D). null