【202307】【校招】百度暑期實習一面面經 · 大廠前端面試真題

[1、瀏覽器的緩存機制是什么？](1%E3%80%81%E6%B5%8F%E8%A7%88%E5%99%A8%E7%9A%84%E7%BC%93%E5%AD%98%E6%9C%BA%E5%88%B6%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F.md) [2、cookie，你能具體說說cookie嗎？](2%E3%80%81cookie%EF%BC%8C%E4%BD%A0%E8%83%BD%E5%85%B7%E4%BD%93%E8%AF%B4%E8%AF%B4cookie%E5%90%97%EF%BC%9F.md) [3、 http1和http2有什么區別，能具體說說嗎？](3%E3%80%81http1%E5%92%8Chttp2%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%EF%BC%8C%E8%83%BD%E5%85%B7%E4%BD%93%E8%AF%B4%E8%AF%B4%E5%90%97%EF%BC%9F.md) [4、比如我有一個a網頁，一個b網頁如何讓他們的cookie隔離開？](4%E3%80%81%E6%AF%94%E5%A6%82%E6%88%91%E6%9C%89%E4%B8%80%E4%B8%AAa%E7%BD%91%E9%A1%B5%EF%BC%8C%E4%B8%80%E4%B8%AAb%E7%BD%91%E9%A1%B5%E5%A6%82%E4%BD%95%E8%AE%A9%E4%BB%96%E4%BB%AC%E7%9A%84cookie%E9%9A%94%E7%A6%BB%E5%BC%80%EF%BC%9F.md) [5、怎么判斷變量的類型？](5%E3%80%81%E6%80%8E%E4%B9%88%E5%88%A4%E6%96%AD%E5%8F%98%E9%87%8F%E7%9A%84%E7%B1%BB%E5%9E%8B%EF%BC%9F.md) [6、那你能說一下原型鏈是什么嗎，原型又是什么？](6%E3%80%81%E9%82%A3%E4%BD%A0%E8%83%BD%E8%AF%B4%E4%B8%80%E4%B8%8B%E5%8E%9F%E5%9E%8B%E9%93%BE%E6%98%AF%E4%BB%80%E4%B9%88%E5%90%97%EF%BC%8C%E5%8E%9F%E5%9E%8B%E5%8F%88%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F.md) [7、我想獲取數組的第一個元素，你有多少種方法？](7%E3%80%81%E6%88%91%E6%83%B3%E8%8E%B7%E5%8F%96%E6%95%B0%E7%BB%84%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%83%E7%B4%A0%EF%BC%8C%E4%BD%A0%E6%9C%89%E5%A4%9A%E5%B0%91%E7%A7%8D%E6%96%B9%E6%B3%95%EF%BC%9F.md) [8、改變this指向有幾個方法？](8%E3%80%81%E6%94%B9%E5%8F%98this%E6%8C%87%E5%90%91%E6%9C%89%E5%87%A0%E4%B8%AA%E6%96%B9%E6%B3%95%EF%BC%9F.md) [9、你能實現一個call方法嗎，具體怎么實現？](9%E3%80%81%E4%BD%A0%E8%83%BD%E5%AE%9E%E7%8E%B0%E4%B8%80%E4%B8%AAcall%E6%96%B9%E6%B3%95%E5%90%97%EF%BC%8C%E5%85%B7%E4%BD%93%E6%80%8E%E4%B9%88%E5%AE%9E%E7%8E%B0%EF%BC%9F.md) [10、如果我對foreach的一個數組進行遍歷，數組的第二位是一個對象，我改變了對象的a屬性，那么原數組會一起改變嗎？](10%E3%80%81%E5%A6%82%E6%9E%9C%E6%88%91%E5%AF%B9foreach%E7%9A%84%E4%B8%80%E4%B8%AA%E6%95%B0%E7%BB%84%E8%BF%9B%E8%A1%8C%E9%81%8D%E5%8E%86%EF%BC%8C%E6%95%B0%E7%BB%84%E7%9A%84%E7%AC%AC%E4%BA%8C%E4%BD%8D%E6%98%AF%E4%B8%80%E4%B8%AA%E5%AF%B9%E8%B1%A1%EF%BC%8C%E6%88%91%E6%94%B9%E5%8F%98%E4%BA%86%E5%AF%B9%E8%B1%A1%E7%9A%84a%E5%B1%9E%E6%80%A7%EF%BC%8C%E9%82%A3%E4%B9%88%E5%8E%9F%E6%95%B0%E7%BB%84%E4%BC%9A%E4%B8%80%E8%B5%B7%E6%94%B9%E5%8F%98%E5%90%97%EF%BC%9F.md) [11、數組有那些方法？](11%E3%80%81%E6%95%B0%E7%BB%84%E6%9C%89%E9%82%A3%E4%BA%9B%E6%96%B9%E6%B3%95%EF%BC%9F.md) [12、 ts的type和interface有什么區別？](12%E3%80%81ts%E7%9A%84type%E5%92%8Cinterface%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%EF%BC%9F.md) [13、 interface bj={obj as string} ：any 最后這個類型是string還是any？](13%E3%80%81interfacebj=objasstring%EF%BC%9Aany%E6%9C%80%E5%90%8E%E8%BF%99%E4%B8%AA%E7%B1%BB%E5%9E%8B%E6%98%AFstring%E8%BF%98%E6%98%AFany%EF%BC%9F.md) [14、說一下react18，他和以前的版本有什么區別？](14%E3%80%81%E8%AF%B4%E4%B8%80%E4%B8%8Breact18%EF%BC%8C%E4%BB%96%E5%92%8C%E4%BB%A5%E5%89%8D%E7%9A%84%E7%89%88%E6%9C%AC%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%EF%BC%9F.md) [15、為什么react18會發起兩次請求？](15%E3%80%81%E4%B8%BA%E4%BB%80%E4%B9%88react18%E4%BC%9A%E5%8F%91%E8%B5%B7%E4%B8%A4%E6%AC%A1%E8%AF%B7%E6%B1%82%EF%BC%9F.md) [16、生產環境也會發生兩次請求嗎？為什么？](16%E3%80%81%E7%94%9F%E4%BA%A7%E7%8E%AF%E5%A2%83%E4%B9%9F%E4%BC%9A%E5%8F%91%E7%94%9F%E4%B8%A4%E6%AC%A1%E8%AF%B7%E6%B1%82%E5%90%97%EF%BC%9F%E4%B8%BA%E4%BB%80%E4%B9%88%EF%BC%9F.md) [17、怎么不讓他發起兩次（不能去除嚴格模式的情況下）？](17%E3%80%81%E6%80%8E%E4%B9%88%E4%B8%8D%E8%AE%A9%E4%BB%96%E5%8F%91%E8%B5%B7%E4%B8%A4%E6%AC%A1%EF%BC%88%E4%B8%8D%E8%83%BD%E5%8E%BB%E9%99%A4%E4%B8%A5%E6%A0%BC%E6%A8%A1%E5%BC%8F%E7%9A%84%E6%83%85%E5%86%B5%E4%B8%8B%EF%BC%89%EF%BC%9F.md) [18、 git創建分支和切換分支？](18%E3%80%81git%E5%88%9B%E5%BB%BA%E5%88%86%E6%94%AF%E5%92%8C%E5%88%87%E6%8D%A2%E5%88%86%E6%94%AF%EF%BC%9F.md) [19、兩道編程題：統計一個字符串中出現最多的字母，并計算數量](19%E3%80%81%E4%B8%A4%E9%81%93%E7%BC%96%E7%A8%8B%E9%A2%98%EF%BC%9A1%E7%BB%9F%E8%AE%A1%E4%B8%80%E4%B8%AA%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%B8%AD%E5%87%BA%E7%8E%B0%E6%9C%80%E5%A4%9A%E7%9A%84%E5%AD%97%E6%AF%8D%EF%BC%8C%E5%B9%B6%E8%AE%A1%E7%AE%97%E6%95%B0%E9%87%8F.md) [20、我現在有一個url字符串，請想辦法提取出來里面的請求的參數，然后將他們返回一個對象出來](20%E3%80%81%E6%88%91%E7%8E%B0%E5%9C%A8%E6%9C%89%E4%B8%80%E4%B8%AAurl%E5%AD%97%E7%AC%A6%E4%B8%B2%EF%BC%8C%E8%AF%B7%E6%83%B3%E5%8A%9E%E6%B3%95%E6%8F%90%E5%8F%96%E5%87%BA%E6%9D%A5%E9%87%8C%E9%9D%A2%E7%9A%84%E8%AF%B7%E6%B1%82%E7%9A%84%E5%8F%82%E6%95%B0%EF%BC%8C%E7%84%B6%E5%90%8E%E5%B0%86%E4%BB%96%E4%BB%AC%E8%BF%94%E5%9B%9E%E4%B8%80%E4%B8%AA%E5%AF%B9%E8%B1%A1%E5%87%BA%E6%9D%A5.md)