var employees = [
  {fname: 'John', lname: 'Walter', desig: 'SSE'},
  {fname: 'Dave', lname: 'Black', desig: 'SE'},
  {fname: 'Samantha', lname: 'Tele', desig: 'Tech Lead'}
];

//Return an Array with lname and desig

var result = employees.map((employee)=>{
  return 'Employee Last Name:- ' + employee.lname + ', Designation:- ' + employee.desig;
});

console.log(result);