Best JMeter Interview Questions and Answers

Orange TechnoMind 27-Sep-2019
orange technomind

JMeter Interview Questions with Answers
JMeter  is an immense demanding Software Testing Technology.Let us find out the Top JMeter Questions and Answers you should prepare for the year 2021. These sample JMeter  interview questions are the ones students get asked to test their mettle.Orange TechnoMind offers Advanced JMeter Interview Questions 2021 that helps you in cracking your interview & acquire dream career as Software Engineer.
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1.What is the use of Jmeter?
Jmeter is an open source desktop application software and is one of the java tools, 100% pure Java application,which is designed to perfom load testing of web based is used for exclusive kinds of testing – performance testing, functional testing, Regression testing, Unit testing.
2.For what purpose Jmeter used?
Jmeter is a performance tool. it is used to test the overall performance of the software. Apache JMeter is a 100% natural Java desktop application designed to load test functional behavior and measure overall performance. It was at the start designed for testing web applications however has seeing that elevated to other test features.
3.What are the other applications tested by Jmeter? 
JMeter can be used to check performance each on static and dynamic resources (files, Servlets, Perl scripts, Java objects, data Bases and Queries, FTP Servers and more)
4.Can we do regression testing with Jmeter?
Yes we can, after-all it is all about java-script.
5.What is Performance Testing?
This test sets the exceptional feasible performance expectation under a given configuration of infrastructure. It additionally highlights early in the testing process if modifications want to be made before application is going into production.
6,What is Load Test?
This test is essentially used for exercising the device under the top load it became designed to operate below.
7.What is Stress Test?
Stress Test is performed to evaluate a system performance with the aid of growing the number of user extra than the limits of its targeted requirements.It is executed to recognize at which level application crash.
8.What are the protocols supported by JMeter?
  • Web: HTTP, HTTPS sites 'web 1.0' web 2.0 
  • Web Services: SOAP / XML-RPC
  • Database via JDBC drivers
  • Directory: LDA
  • Messaging Oriented service via JMS
  • Service: POP3, IMAP, SMTP
  • FTP Service
9.What are the options, do you see when jmtere window opens?
1. Test Plan   
2. Workbench
10.What is Test Plan in Jmeter?
Test plan is an official documentation that describes a sequence of steps JMeter will execute when run.A whole test plan will encompass one or more Thread groups, logic conrollers, sample generating controllers, listeners, timers, assertions, and configuration elements.
11.What is Work bench?
The Workbench is actually an area to save test elements at the same time as you're in the process of constructing a test. It is a sandbox for any test or part of a test that you are operating on.while you are prepared to test what you have designed inside the Workbench, you can copy or paste into the test Plan.
It also contains Non- Test Elements
  • Http mirror sever
  • Http Proxy server
12.Which Jmeter elements are used for Parameterization?
1. User parameter
2. CSV Data Set config
13.In JMeter Which controllers are used as an conditional controllers ?
If controller and While controller
14.What is the Timer in JMeter?
Timers are used for halting the test execution of a thread for a sure predefined time. These timers are used for simulating the actual user assume time.
15.What are the different types of Timer in JMeter?
The distinctive varieties of timers to be had in JMeter are:
  • Constant Timer
  • Gaussian Random Timer
  • Uniform Random Timer
  • Constant Throughput Timer
  • Synchronizing Timer
  • Beanshell timer
  • Throughput Shaping Timer
  • JSR223 Timer
  • Poisson Random Timer 
16.What are the listeners in JMeter?
Listeners are used for storing the execution outcomes of load testing in exclusive forms like table, graph, tree or in some other presentable format so that it can be provided to the client. 
17.What is heap size in jmeter?
Jmeter is work in java, and heap size is associated with java. Java heap is the heap size allotted to JVM applications which looks after the new objects being created. If the objects being created exceed the heap length, it will throw an error of java.lang.out.of.memory.Java's default heap size limit in Jmeter is 256 MB.
18.Explain parameterization in JMeter?
Parameterization is process of generalizing some user input, so that it will use it for more than one users or executions.
19.Which Jmeter elements are used for Parameterization?
•    User parameter
•    CSV Data Set config
20.what is Assertion in JMeter?
Assertion allows to affirm that your server under test returns the expected results.
21.What are the types of assertion?
Some commonly used Assertion in JMeter are:
•    Response Assertion
•    Duration Assertion
•    Size Assertion
•    XML Assertion
•    HTML Assertion
22.What is Thread Group?
Thread Group elements are the start point factors of your test plan. because the name indicates, the thread group elements manipulate the wide variety of threads JMeter will use throughout the test. 
23.What are Pre-Processor and Post-Processor elements?
A Pre-Procesor is some thing in order to take place before a sampler executes. they may be frequently used to modify the settings of a sample Request simply before it runs, or to update variables that aren't extracted from response text. A post Processor executes after a sampler completes its execution. This element is most often used to process the response data, as an example, to retrieve unique value for later use
24.How do you ensure re-usability in your JMeter scripts?
Using config elements like "CSV Data Set Config", "User Defined Variables", and so on for more prominent data reuse. Modularizing shared tasks and invoking them by means of a "Module Controller". Writing your own BeanShell functions, and reusing them. 
25.What are JMeter Functions?
JMeter functions are special values that can populate fields of any Sampler or different element in a test tree. A function call seems like this: ${__functionName(var1,var2,var3)}
26.Where can functions and variables be used?
Functions and variables can be composed into any field of any test component.
27.What are regular expressions in JMeter?
Regular expressions are utilized to search and manage text, based on patterns. JMeter interprets kinds of regular expressions or patterns being used during a JMeter test plan, through which includes the pattern matching software Apache Jakarta ORO.
28.What are the types of Controllers?
JMeter has two types of Controllers
  • Samplers Controllers 
  • Logic Controllers
29.What is Samplers Controllers?
Samplers permit JMeter to send particular types of requests to a server. They simulate a user's request for a web page from the target server. for example, you could add a HTTP Request sampler if you need to carry out a post, GET, DELETE on a HTTP
30.What is Logic Controllers?
Logic Controllers  permit you to determine the order and control the order of processing of Samplers in a Thread.logic Controllers can exchange the order of request coming from any in their child elements Some of the examples are ForEach Controller, While Controller, IF Controller, Loop Controller, Run Time Controller,Interleave Controller, Throughput Controller, Run Once Controller.


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