Output the below code? var objA = {prop1: 42}; var objB = objA; objB = {}; console.log(objA) ************************* var employeeId = '1234abe'; (function() { console.log(employeeId); var employeeId = '122345'; }()); ****************** .a.b .c span#qq ****************** .a > .b

Asked me to design Todo app with the help of callback and memo.

Basic React app optimization questions & end to end system design for instagram story. when user upload anything on instagram story.