Very usefull Performance Testing Interview Questions And Answers:
Hello, looking for interview questions in loadrunner? I have tried my level best to put these interview questions. If you find any new questions, you can always send me through the contact form below. I will include them in this...
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Loadrunner Function to write current system Time - A basic example script to print current time stamp
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This main use of this functions to return the current system time at any given point of time while loadrunner script is running.This function can be used to report transaction times , script starting time and end time.
Attached is a sample script for demo purpose.
Please share more methods to...
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System Command Example In Loadrunner - Making a command line (CMD) call through loadrunner
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Attached is the sample loadrunner file
Example Description
In this example we are doing following activities via a loadrunner script
1. Create a direcotry named speforums in your C drive.
2. Execute a ping command and save it as a file inside c://speforums directory.
Sample code
char...
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Littles Law in Performance Engineering - A practical guide of the use of little's law in performance testing
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Little’s Law
Little’s law was named after “John Dutton Conant Little” who was an Institute Professor at the Massachusetts Institute of Technology. Little’s law is a generic and simple law which can be applied not only to software systems but to any generic closed system.
Little‘s law states...
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Exporting and Importing Runtime Settings in loadrunner - Copy runtime settings from one script to other
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Import and Export Runtime Settings
This topic describes how to import and export runtime settings. This functionality is available for all Vuser protocols.
Importing and Exporting runtime settings can be helpful in many ways to a tester as this has following advantages
Saves time by copying...
To retrieve an email from gmail using loadrunner
Prerequisite : A working gmail account with password.
We created a script using POP3 Protocol in loadrunner and used following code to retrieve the emails
//int totalMessages;
pop3_logon("Login"...
Amdahl’s law is a formula used in parallel computing to find the maximum improvement improvement possible by improving a particular part of a system. In parallel computing, Amdahl's law is mainly used to predict the theoretical maximum speedup for program processing using multiple processors. It...
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Utilization Law and Service Demand - Relationship between service time, utilization and throughput
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Consider that you are in a bank queue behind 10 persons and estimate that the bank teller is taking around 5 minutes per customer to count currency. At queue management counter, it takes another 3 min to get token for each customer. Here 5 min and 3 min are respective service times for each...
Utlization
Utilization of any system resource is defined as the Ratio of Busy Time to Total Time of Observation.
Example
Let us consider an ATM center with one ATM machine to understand the utilization. If there are 20 people coming in to the ATM center in one hour then the arrival rate is...
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Throughput/Transactions per Second (TPS) - Defining the key performance measurement quantity of throughput
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Throughput
In general terms, throughput is the maximum rate of production or the maximum rate at which something can be processed [Wikipedia]. In real world we define any rate of processing as throughput, for example - Network throughput.
In network communications throughput is defined as the...