var arrToUpdate = [
    {_id:0,name:"Dennis"},
    {_id:1,name:"Peter"},
    {_id:2,name:"Ghandi"}
];

collection.bulkWrite(
  arrToUpdate.map( d => ({
    "replaceOne": {
      "filter": { "_id": d._id },
      "replacement": d
    }
  })),
  function(err,result) {
    console.log(result)
  }
)