User Interface Developer Intern Interview Questions and Answers

let is block scoped, const is constant, var is function scoped

• let: block scoped, can be reassigned, not hoisted

• const: block scoped, cannot be reassigned, not hoisted

• var: function scoped, can be reassigned, hoisted to the top of the function

Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during the compilation phase.

• Variable and function declarations are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations take precedence over variable declarations.