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Server Side Testing Interview Question



A) What does Question Mark symbol (?) and hash Symbol (&) means in URL?
1)?  Separates URL and list of parameters
2) & separates each parameter
B) What are the different types of web servers?
  • Apache web server - the HTTP web server
  • Apache Tomcat
  • Microsoft's Internet Information Services (IIS) Windows Server
  • Nginx web server
  • Oracle Web Tier
C) What are the different types of Hosting servers?
  • Windows
  • Linux
D) What is the difference between HTTP and HTTPS?
  • HTTP: (Hypertext Transfer Protocol): HTTP is not secured and it operats at application layer and it does not require any certificate to access data. It uses port no 80 for communication.
  •  HTTPS: (Hypertext Transfer Protocol Secure): HTTPS is secured and operates at transport layer and It requires certificates to access data. It uses port no 443 for communication
E) What are the below Servers error means?

All  (200 To 206) are Successful Status Codes
All  (300 To 307) are  Redirection Status Codes


All 4xx (400 To 499) are Client Error
400 à Bad Requests
401 à Unauthorized error
403 à Forbidden Error
404 à Not found error
409 à Conflict

All 5xx (500 To 599) are all server side errors
500 à Internal Server Error
502 à Bad Gateway
503à Services Unavailable
504à Gateway Timeout

F) How Domain Name calls server IP?
 Every Domain Name (www.xyz.com) is having its own unique Domain Name System (DNS) and in DNS we have to mention server IP which is nothing but the path of hosting server where all code and DB is present 

G) Difference between Severity and priority?
      Priority:
  • High Priority: Key features does not work
  • Low Priority: features that is rarely used does not work
      Severity:
  • High Severity: Key features does not work
  • Low Severity: In company logo company name is incorrect
H)  What is Null Pointer exception?
NullPointerException is a RuntimeException . In Java, a special null can be assigned to an object reference. NullPointerException is thrown when an application attempts to use an object reference, having the null value. 
I)  HTTP Protocol or HTTP Methods or web GET, POST, PUT, DELETE?
Ans: http://www.w3schools.com/tags/ref_httpmethods.asp

Get: 
  • GET requests should never be used when dealing with sensitive data
  • GET requests have length restrictions
  • GET requests should be used only to retrieve data
Post:
  • POST requests have no restrictions on data length
  • Used to post data on server
Security
GET is less secure compared to POST because data sent is part of the URL

Never use GET when sending passwords or other sensitive information!
POST is a little safer than GET because the parameters are not stored in browser
 history or in web server logs
Visibility
Data is visible to everyone in the URL
Data is not displayed in the URL
Put Vs Post:
PUT is meant as a a method for "uploading" stuff to a particular URI, or overwriting what is already in that URI.
POST, on the other hand, is a way of submitting data RELATED to a given URI.
Ans:
K) Client Side and Server Side Validation?
Ans: http://net-informations.com/faq/asp/validation.htm

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