Loadrunner Interview Questions

What is LoadRunner?
LoadRunner is a software testing tool from Micro Focus used for application performance and load testing. It simulates multiple virtual users to put load on applications and measure performance under different load conditions.
What are the main components of LoadRunner?
The main components are Virtual User Generator (VuGen), Controller, Load Generators, Analysis, and Monitor over Firewall.
What scripting protocols are supported in LoadRunner?
LoadRunner supports a wide range of protocols like Web HTTP/HTML, Oracle NCA, .NET, Java, DCOM, Web Services, Ajax TruClient, Flex, GWT, and more.
How do you create user scripts in LoadRunner?
User scripts are recorded in VuGen by performing typical user actions. The recorded script can then be edited and enhanced with programming logic using VuGen's script view.
What are the different workload simulation models in LoadRunner?
The main workload models are Concurrent, Queued Entries, Queued Instances, Rendezvous, and Duration Groups.
How can you simulate real-world scenarios in LoadRunner?
LoadRunner allows defining multiple scenarios with different user behavior, load patterns, and execution schedules to closely mimic real user activities.
What are some common performance counters monitored in LoadRunner?
Transaction response time, hits per second, windows resources like CPU/memory utilization, network delays, web server/application server metrics are typically monitored.
How do you integrate LoadRunner with other tools?
LoadRunner integrates with tools like ALM/Quality Center, Performance Center, and Service Virtualization for virtualizing services, and TruClient protocols.
What script enhancement techniques are used in LoadRunner?
Common techniques include correlation (handling dynamic values), parameterization, transactions, synchronization, and data input from files/databases, checkpoints, and coding standards.
How is LoadRunner licensed?
LoadRunner is licensed based on VUses or virtual user hours and add-on protocols. Perpetual and subscription models are available.