Global and Local Scope

It is a variable inside the function or block scope?

• Global scope

• Local scope

• Function scope

• Block scope

It declares variables inside a function and can be accessed only inside the function where they are declared

• Global scope

• Local scope

• Function scope

• Block scope

What type of scope is this?

{ var x = 10 ;

var x = 5 ;

var x = 8 ;}

• Global scope

• Local scope- Block scope

• Local scope-Function scope

• variable scope

It is a keyword in declaring variable?

• var

• let

• const

• x or y

It is a keyword use to declare constant.

• var

• let

• const

• x or y

What type of redeclaring or assigning variables is this?

const x = 2; // Allowed

{ const x = 3; // Allowed }

{ const x = 4; // Allowed }

• Redeclaring a JavaScript var variable is allowed anywhere in a program

• Redeclaring or reassigning an existing var or let variable to const, in the same scope, or in the same block, is not allowed

• Redeclaring or reassigning an existing const variable, in the same scope, or in the same block, is not allowed

• Redeclaring a variable with const, in another scope, or in another block, is allowed

What type of redeclaring or assigning variables is this?

var x = 2; // Allowed

var x = 3; // Allowed

x = 4; // Allowed

• Redeclaring a JavaScript var variable is allowed anywhere in a program

• Redeclaring or reassigning an existing var or let variable to const, in the same scope, or in the same block, is not allowed

• Redeclaring or reassigning an existing const variable, in the same scope, or in the same block, is not allowed

• Redeclaring a variable with const, in another scope, or in another block, is allowed

What type of redeclaring or assigning variables is this?

var x = 2; // Allowed

const x = 2; // Not allowed

{ let x = 2; // Allowed

const x = 2; // Not allowed }

• Redeclaring a JavaScript var variable is allowed anywhere in a program

• Redeclaring or reassigning an existing var or let variable to const, in the same scope, or in the same block, is not allowed

• Redeclaring or reassigning an existing const variable, in the same scope, or in the same block, is not allowed

• Redeclaring a variable with const, in another scope, or in another block, is allowed

It is the most common variable use in algebraic equation?

• a

• b

• x

• y

In the JavaScript statement below, which part will Not Allowed

var x = 2; // A

const x = 2; // B

{ let x = 2; // C

const x = 2; // D

• A and C

• B and D

• A

• C