Author: Sharath Chandran

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MDM – Mobile device management (MDM) & Master data management (MDM)

MDM – Mobile device management (MDM) & Master data management (MDM)

Mobile device management (MDM) is a type of security software.
MDM is used to manage , monitor, and secure mobile devices that are deployed across multiple mobile service providers,& multiple mobile operating systems.
Master data management (MDM) is a method of enabling an enterprise to link all the critical data to one file (a master file) which can provide a common point of reference.

When properly done, MDM manages data sharing among personnel and departments.

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Salesforce Object Query Language(SOQL) and Salesforce Object Search Language (SOSL)

Salesforce Object Query Language(SOQL) and Salesforce Object Search Language (SOSL)

SOQL is similar to the standard SQL language but SOQL is more customized for the Force.com platform. To read a saved record from Sales force, Sales force Object Query Language (SOQL) is used.

Sales force Object Search Language (SOSL) is used to construct text-based search queries against the search index.
SOSL searches are faster and can return much more relevant results.

SOQL can only query one object at a time, but a single SOSL query can search all objects which includes custom objects.

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Load balancing

Load balancing

Load balance testing.  Load balancing is a method of balancing the network traffic to make sure network transactions are distributed across all the servers. for e.g if a server fails during heavy applied in them, load balancer will redirect the transactions to remaining servers. Basically Load balance acts as a reverse proxy. During performance testing this feature is tested usually.

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Some of the HTTP status codes

Some of the HTTP status codes

2xx is Success, some of the 2xx are below,
200 OK
204 No Content

3xx is Redirection, some of the 3xx are below,
300 Multiple Choices – client has option to choose one from many
301 Moved Permanently
307 Temporary Redirect (since HTTP/1.1)
308 Permanent Redirect

4xx is Client Error, some of the 4xx are below,
400 Bad Request
401 Unauthorized
403 Forbidden
404 Not Found

5xx Server Error, some of the 5xx are below,
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Time-out

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Performance testing vs Load testing vs Stress testing vs Endurance testing

Performance testing vs Load testing vs  Stress testing vs Endurance testing

1. Performance testing – The main purpose of Performance testing is to arrive the benchmark & baseline of the system behavior (e.g response time) under normal/moderate load. This test will help performance engineer  to analyse how does the application behave under normal conditions.

 

2. Load testing  – here load will be constantly and steadily increased over a given period of time. i.e the constant load applied for a constant period of time. For example a load of 100 users are applied for 15 min.

3. Stress test – it is meant to push the system beyond the normal load limits or extreme conditions. This test is to make sure the servers don’t crash or what point it crashes. Stress test will  verify the breaking point of the system or how much load, system can withstand.

For example a load of 100 users are applied for 15 min and then 150 users load is applied for next 15 min. then 200 users load is applied for next 15 min. Verify at what point system stopped to respond.

4. Endurance testing – for easy understanding, I would say it is a “Load testing on extended period” to make sure web servers are performing longer period of time. For example a load of 100 users are applied for 48 hours

Note: Once the performance testing is completed successfully, tester can assume the performance requirements are met and he can start load testing. After that Stress testing if required.

Load testing tools in the market are

1) HPE LoadRunner is from Hewlett Packard Enterprise.

2) JMeter – Apache JMeter. It is a Java based performance testing tool works on web communication layer (HTTP)

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HTML5 API’s

HTML5 API’s are as below

  • HTML Geo location – used for locating user’s position
  • HTML Drag and Drop- helps to “grab” an object and drag it to different location.
  • HTML Local Storage – this feature is better than cookies where web applications will be able to store data locally within the user’s browser; 
  • HTML Application Cache – intended to make an offline version of a web application, by creating a cache manifest file. it helps to reduce server load – the browser shall only need to download /update the changed resources from the server.
  • HTML Web Workers – is a JavaScript running in the background, this is will not  affect the performance of the page.

HTML SSE (Server-Sent Events ) is meant to allow a web page to get updates from a server.