HTTP Interview Questions and Answers

Today, We want to share with you http interview questions.In this post we will show you http status codes interview questions, hear for fundamentals of computer we will give you demo and example for implement.In this post, we will learn about PHP Technical Interview Questions And Answers with an example.

Top 20 HTTP Interview Questions for 2020

A list of top 20+ frequently asked HTTP interview questions and answers are given below.

Let’s see the list of top http interview questions.

1) What is HTTP?

HTTP means for Hypertext Transfer Protocol. HTTP is a set of rules for transferring of data on WWW (World Wide Web).

2) What are the basic Features of HTTP?

The basic features of HTTP are as follows:

  1. HTTP is a request and response protocol.
  2. HTTP is a media independent protocol.
  3. HTTP is a stateless protocol.

3) What are request methods in HTTP?

bellow are the request methods:

  • GET- GET request is used to send data in url.
  • HEAD- HEAD request only transfers status line and header section as a request.
  • POST- POST request is used to send data to the server.
  • PUT- PUT request is used to send entire updated data to the server. DELETE. here http Delete request method sends a to the server side to perform delete operation.
  • CONNECT- CONNECT is used to establish connection to the server.
  • OPTIONS- Option method describes communication options for target asset.
  • TRACE- TRACE execute some message loop-back test based along the real path to the target asset.

4) What are the differences between GET and POST request method?

bellow are the differences between GET and POST request method:

Get Post
GET is cached. POST cannot be cached.
GET sends data using url in the browser. POST does not send data into the url.
GET can send limited amount of data to the server. I can send data in bulk or Multiple to the web server.

5) What is status code in HTTP?

status code is a Standard response code given by web server on Internet. HTTP helps to identify the cause of problem when web page or other asset does not load properly.

There are two major group of HTTP status code error exist:

  • 4xx Client Error
  • 5xx Server Error

6) What are the header fields in HTTP?

HTTP headers fields allow the client as well as server to pass information with the request as well as response message.

bellow are the header fields in HTTP:

  • General header- General header applies for both request as well as response message.
  • Request header- Request header contains information for the request message.
  • Response header- Response header is used to contain response header information sent by the web server.
  • Entity header- Entity header is used to contain more information about the body of the entity.

7) What is URI?

URI is used to define the identity of something on the online web application. URI can represent a some types of the piece of online based an url.

8) What are Idempotent methods?

In idempotent request methods, for the multiple or bulk based requests, i retrive exact same output. Idempotent methods would no matter if the request is called one or ten times, the output should be same.

9) What is secure HTTP?

The secure HTTP is secure version of HTTP. In this protocol, data transfer over the World Wide Web is secure as well as encrypted. secure HTTP is used to execute highly confidential online transaction like financial transactions.

10) What are the benefits of HTTPS certificate?

The major benefits of HTTPS certificate are:

  • user information like credit card number as well as ATM pin is encrypted as well as cannot be easily track.
  • users trust as well as prefer to purchase from the Web sites that use HTTPS protocol.
  • This protocol shows authenticate register domain as secure connection.

11) What is cURL in HTTP?

cURL is command line tool. cURL in HTTP is available on all major operating systems.

12) What is REST?

REST means for Representational State data Transfer. REST is a set of all the data contanet that ensure a scalable, fault-tolerant as well as simply adaptable system. REST relies on a stateless, client server as well as more cacheable communications protocol.

13) What is DNS spoofing?

DNS spoofing is a way of computer more some types of the attack where user is forced fully to navigate to a fake online website to look like real one. as well DNS spoofing intention is to diverting traffic as well as to fetch user data.

14) What is 500 internal server errors?

Web server shows 500 internal server error, when processing fails due to some unanticipated each on the server side.

15) What is HTTP 409 response code?

When we use PUT request to create the same asset twice then server shows 409 code to the browser.

16) What is the mean of HTTP 405 error “Method not allowed”?

Web Server shows the HTTP 405 error message, when requested method is not allowed. Ex. if a asset supports retrive method, we cannot request post to get this asset.

17) What is HTTP 401 response code?

This response code is generated when an unauthorized user request for secure asset on the web server.

18) What is HTTP 404 Not found response code?

This 404 code specifys that the requested asset is not available at the web server.

19) What is HTTP 400 Bad Request response code?

This request shows malfunction. HTTP 400 Bad Request response code show specially with POST as well as PUT requests, when the data does not pass validation.

20) What is HTTP 201 Created response code?

This specifys that the request was successful. HTTP 201 is used to confirm success of a PUT or POST HTTP request.

21) What is HTTP 200 OK response code?

HTTP 200 OK response code specifys that the user any request is successful.

I hope you get an idea about http interview questions.
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