Software Performance testing is the type of testing performed to decide on the quality of the execution of the system which is under scrutiny to assess the measure, validation or confirm the quality properties of the framework like responsiveness, speed, scalability, stability under a varied variety of load conditions. The system is tested under a blend of load conditions and is checked for the time required for reacting by the system under changing workloads.
Performance testing engineers and workers are known to be some of the most joyful workers in America. Programming Testers are paid well, and their compensation averages around $75 to $100 K. This job profile can offer you long-term stability and security. Therefore to help you get that dream job in performance testing field our experts have compiled a list of a few most expected questions in an interview on performance testing.
For the person who is looking to attend performance testing interview anytime soon, here are most commonly asked interview questions and answers to help you in the right way with your interview for the dream job of yours. Here, we have incorporated the most frequently asked questions along with pertinent answers to help freshers and the experienced professionals in the field.
Performance testing is a discipline of software testing wherein a tester tests the given system to assess the system’s performance when subjected to a variety of virtual user load.
There are primarily six types of performance testing. They are-
Stress Testing is also known as negative testing as the tester test the system beyond its boundaries specified to discover the breakpoint threshold of the system. Whereas load testing is the easiest form of performance testing which is done by increasing the testing load step by step to reach the defined limit or the goal.
Concurrent user load in performance testing can be defined as something when many users hit any functionality or operation at the same time.
A protocol is a defined as a set of various rules for the purpose of information communication between the two or more systems. There are many protocols such as Http/Https, FTP, Web Services, Citrix, Http/Https and Web Services.
A few recurring performance testing problems are-
Some popular common performance bottlenecks are-
Some common performance testing tools are-
The parameters considered are-
To create a performance test plan in JMeter you need the following steps-
Here is a list of phases for automated performance testing
Benchmark Testing is the method deployed for comparing the performance of your system framework performance against a set industry standard that is laid out already by some other organization. Whereas the Baseline Testing is the type of testing technique where a tester runs a series of tests in order to get hold of the performance information. When any future change is made in the given app, this data is then used as a reference point.
Performance tuning is a method or a mechanism followed to improve the system performance.
In order to improve the performance of the system, primarily there are two types of tuning performed-
Performance testing is generally required to validate the below-given things:
Following were the drawbacks of manual Load Testing that lead to the adoption of Automation load testing:
Performance Bottlenecks can be easily recognized by monitoring the app against load and stress conditions. To find bottleneck situation in performance testing the testers usually use Load Runner because it supports many different types of monitors like a run-time monitor, network delay monitor, web resource monitor, database server monitor, firewall monitor, ERP server resources monitor and Java performance monitor. These monitors in turn help to the tester to establish the condition which causes an increase in the response time of the application. The capacity of the performance of the application is based on response time, throughput, hits per sec, network delay graphs, etc.
Spike Testing is conducted to comprehend what changes happen on the appl when the abruptly large number of users is either increased or decreased. Unexpected changes in the number of users by increasing or decreasing at a certain point of application and then monitoring the behavior of the app thereafter. In JMeter, spike testing can be achieved by using Synchronizing Timer. The threads are jammed by synchronizing the timer until a specific number of threads have been successfully blocked, and then release them at once thus creating large immediate load.
Throughput in Performance testing is either the quantity of data sent by the server in response to the client request in a particular given period of time or it is the specific number of units of work that can be handled in per unit of time. The throughput is calculated in terms of requests received per second, calls per day, reports per year, hits per second, etc. In the majority of the cases, the throughput is premeditated in bits per seconds.
Profiling is a procedure of pinpointing a bottleneck performance at miniature levels. This is done by presentation teams for manufacturing which mainly includes developers or performance testers. You can profile in any application layer which is getting tested. If you want to do application profiling you may require utilizing tools for performance profiling of application servers.
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