react js interview questions

PHP interview questions, that is, no answer I. Basic and program questions (we suggest using the languages you are good at: C/C ++, PHP, and Java) 1. Write a sorting algorithm, which can be Bubble sorting or fast sorting. Assume that the object to be sorted is a dimension array. (Note: you cannot use existing functions of the system. Remember the basic knowledge

from the interview. Articles you may be interested in: Use webqq protocol to use python to log on to qq and send the source code reference Example of using python to call java Webservice Python FizzBuzzWhizz (checklist) Example Python Web server Tornado usage Summary Analysis of communication examples between Python and js clients through websocket Share the simple Performance Test Results of common

, margin: auto; can achieve vertical center .. ③ BFC (shameful, I finally found that I didn't put him ...) The spacing between adjacent boxes is determined by the margin and the vertical margin overlaps. Float and clear float are only valid for elements in the same BFC. Nima sadly, even though I still don't know what he is doing .... Here I kneel down with shame... Leave it for future solutions.Conclusion I found myself a title party! I did not give a positive answer to the question becaus

This article mainly introduces the collection of typical PHP interview questions and collects common php interview questions and related reference answers for your reference, for more information, see this article. Share it with you for your reference. The details are as follows: I did some php

For Loop + setTimeout combined with some examples (front-end interview questions), settimeout front-end I. background I recently reviewed the old book "node. js Development Guide" and encountered a typical example of for loop + setTimeout. So I reorganized my ideas and recorded them. 2. execution mechanism of setTimeout and setInterval In daily coding, you will f

the rectangle)E) getarea ())F) write the complete code of the constructor.G) Code of the called instance Javascript interview questions Javascript pop-up confirmation box functionAfter the text box is entered, press enter to jump to the next text boxHow to write the message box prompted for deletion on the server What types of input are in form? What are their respective operations?Text radio checkbox fil

I am going. Write down. 2345PHP interview question 1. Write the html of the checkbox in the figure. Label bicycle: inputtypecheckboxnamenamevaluevaluelabel2. write a css section to make a div left floating dividwerdiv # wer {position: relative; float: left} 3. Write a php set HTTP404 status I am going. Write down. 2345PHP interview question 1. Write the html of the checkbox in the figure. Label bicycle: inp

25 JavaScript interview questions you need to know 1. Usetypeof bar === "object"JudgmentbarIs an object having potential drawbacks? How can we avoid such disadvantages? UsetypeofThe disadvantage is obvious.instanceof): let obj = {};let arr = [];console.log(typeof obj === 'object'); //trueconsole.log(typeof arr === 'object'); //trueconsole.log(typeof null === 'object'); //true According to the output,type

front end "proxy mode" Ajax cross-domain issues can be consulted: 1190000012469713 Ajax solves browser caching problems? Ajax solves browser caching problems? 1. Add Anyajaxobj.setrequestheader ("If-modified-since", "0") to Ajax before sending the request. 2. Add Anyajaxobj.setrequestheader ("Cache-control", "No-cache") to Ajax before sending the request. 3, add a random number after the URL: "fresh=" + math.random ();. 4. Add a timestamp a

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are not placed under the sub-domain name, but placed in a separate primary domain name. There is also a reason that the browser for a domain name will have a limit on the number of requests, this method can be convenient to do CDN.What are the states of the readystate of 23.ajax, and what are the meanings respectively?Ajax readystate A total of 5 states, respectively, 0-4, each of which means that the meaning of each number is 0 is not called the Open method, 1 means that the Send method is not

JavaScript Interview Requirements: the following questions must be selected from one to four, three questions are implemented using native code, and no framework is available. The fifth question is chosen as the JavaScript Interview Requirements: the following questions must

array.The loop turns the first bit of the array into uppercase, so you have to decide whether to do it in English first.That's the way I used it. The interview says there's an easier way to know. The second question does not know the understanding is right, is obtains a/b/c/d/and a/b/12/34/?If so, I'm used to the regular.$a = ' a/b/c/d/e.php ';Preg_matches ('. * * ', $a, $match);$dir = $match [0];.. /.. /c/d/.. /.. /12/34/Or.. /c/d/.. /12/34/Hint Ar

types of attacks (XSS and CSRF) to understand the extent.5) Whether to understand public key cryptography and private key encryption. How to ensure that the password field in the form submission is not compromised. What does the captcha do to solve the security problem?6) Coding Common sense: File encoding, URL encoding, Unicode encoding what meaning. How a GBK encoded page correctly references a UTF8 resource　VI. Study ability and methodology1) What is the website you must log into every day (

Ordinary PHP Programmer pen TestTags: programmer PHP interview 2009-02-06 15:191. Use PHP to print out the day before, the print format is May 10, 2007 22:21:212. PHP code is as follows:$a = "Hello";$b =amp; $a;Unset ($b);$b = "World";echo $a;What is the result?3. PHP code is as follows:$STR = "CD";$ $str = "Landog";$ $str. = "OK";Echo $CD;What is the result?4. Write a code with PHP, implementation does not use the 3rd variable, Exchange $a, $b value,

types of attacks (XSS and CSRF) to understand the extent.5) Whether to understand public key cryptography and private key encryption. How to ensure that the password field in the form submission is not compromised. What does the captcha do to solve the security problem?6) Coding Common sense: File encoding, URL encoding, Unicode encoding what meaning. How a GBK encoded page correctly references a UTF8 resource　VI. Study ability and methodology1) What is the website you must log into every day (

Math, etc. that cannot be instantiated.The host is the browser's own Document,window, etc.The difference between 19.document load and document readyDocument.onload is executed after the structure and style are loaded. jsDocument.ready native species there is no such method, there is $ () in jquery. Ready (function)20. The difference between "= =" and "= = ="The former will automatically convert the typeThe latter will notSame-origin strategy for 21.javascriptA script can read only the propertie

Although the questions listed in this article seem simple, each of them covers one or several basic knowledge points that are easily overlooked by everyone, hoping to help you with your interview and work in peacetime. Although the questions listed in this article seem simple, each of them covers one or several basic knowledge points that are easily overlooked by

The company needs to split the project and use the Vue framework at the front end. Questions summarized by the last interview vue 1: What is the mvvm framework? What is the difference between it and other frameworks? Mvvm full name Model View viewmodel, model data model, view layer, viewmodel is linked to both The difference is that vue is a data-driven, and the view layer rather than node operations are d

Baidu Home Login 2017 the most complete 30 Android interview questions, how will you answer?Wing Technologyhundred 03-10 02:32 "Three gold four silver" is also the annual job-hopping season, I believe that a lot of Android programmers began to get ready. However, in the face of the interviewer's question, how will you answer?First, how to understand the relationship between the three Activity,view,window?T