Answer & Solution
Answer: Option B
Solution:
Variables declared with 'var' are function-scoped, meaning they are accessible within the function they are declared in.
1.
What is the default scope of variables declared with the 'var' keyword in JavaScript?
2.
Which keyword allows block-scoped variable declaration?
3.
What will be the output of the following code: var x = 5; var x = 10; console.log(x);
4.
How does 'let' handle variable re-declaration in the same scope?
5.
What will be the output of the following code: let y = 10; let y = 20; console.log(y);
6.
Can you re-declare a variable using 'const' in the same scope?
7.
What will be the output of the following code: const z = 30; z = 40; console.log(z);
8.
How do 'var' declarations handle hoisting?
9.
What will be the output of the following code: console.log(a); var a = 50;
10.
Which keyword should be used by default to declare variables in modern JavaScript?