TCS Performance Engineer Interview Questions and Answers

PTLC stands for Performance Testing Life Cycle, which is a process followed in performance testing to ensure the performance of a system.

• PTLC involves planning, preparation, execution, and analysis of performance tests.

• It includes defining performance goals, creating test scenarios, executing tests, and analyzing results.

• PTLC helps in identifying performance bottlenecks and optimizing system performance.

• Example: In PTL...read more

Python script to capture system resources

• Use psutil library to access system resources

• Collect CPU, memory, disk, and network usage data

• Display the captured resources in a readable format

Network bandwidth constraint in testing refers to limitations on the amount of data that can be transmitted over a network during testing.

• Network bandwidth constraint can impact the performance of an application or system being tested.

• It can lead to slow response times, timeouts, or even failures during testing.

• Examples of network bandwidth constraints include limited bandwidth on a shared network, network congestion, ...read more

Timers in JMeter are used to simulate real user behavior by adding delays between requests.

• Timers help in controlling the load on the server by adding delays between requests.

• They can be used to simulate realistic user behavior by adding random or constant delays.

• Examples of timers in JMeter include Constant Timer, Gaussian Random Timer, and Uniform Random Timer.

Reverse a given number

• Convert the number to a string

• Reverse the string

• Convert the reversed string back to a number

I used Jmeter for its user-friendly interface, extensive features, and ability to simulate real-world scenarios.

• Jmeter has a user-friendly interface which makes it easy to create and execute performance tests.

• It offers a wide range of features for load testing, stress testing, and performance monitoring.

• Jmeter allows for the simulation of real-world scenarios, helping to identify performance bottlenecks and optimize sy...read more

SLA in performance testing refers to the agreed upon level of service that a system must meet in terms of response time, throughput, and other performance metrics.

• SLA stands for Service Level Agreement

• It defines the expected performance metrics that a system must meet

• SLAs are typically agreed upon between stakeholders and are used to measure the performance of a system

• Examples of SLAs include response time should be le...read more

Correlation in JMeter is the process of extracting dynamic values from server responses and passing them as inputs to subsequent requests.

• Correlation is important in performance testing to simulate real user behavior.

• It involves identifying and capturing dynamic values like session IDs, tokens, etc.

• These values are then extracted using regular expressions or built-in JMeter functions.

• The extracted values are stored in ...read more

I used multiple types of listeners including JMeter listeners, PerfMon Metrics Collector, and InfluxDB Backend Listener.

• JMeter listeners

• PerfMon Metrics Collector

• InfluxDB Backend Listener

Parameterization is the process of replacing hard-coded values in a test script with variables to make the script more dynamic and reusable.

• Parameterization helps in simulating real-world scenarios by varying input data during test execution.

• It allows for running the same test script with different sets of data without the need to modify the script each time.

• Common examples of parameterization include using CSV files, ...read more

Threads are lightweight processes within a process that can run concurrently. Thread groups are a collection of threads.

• Threads are independent sequences of execution within a process.

• Thread groups are used to organize and manage multiple threads together.

• Threads within a group can share resources and communicate with each other.

• Example: In performance testing, threads can simulate multiple users accessing a system con

Controllers in JMeter are elements used to organize and structure test plans.

• Controllers are used to group samplers and other elements in JMeter test plans.

• There are different types of controllers such as Simple Controller, Loop Controller, If Controller, etc.

• Controllers help in organizing and managing the flow of requests in a test plan.

• Example: If Controller can be used to execute a sampler based on a condition.

True client protocol uses HTTP/HTTPS to communicate with the server.

• Uses HTTP/HTTPS for communication

• Simulates real user behavior

• Supports dynamic parameters and correlation

Optimizing performance using New Relic involves monitoring, analyzing, and making adjustments based on insights.

• Set up custom dashboards to monitor key performance metrics

• Use New Relic APM to identify bottlenecks in code and optimize

• Leverage New Relic Insights for deeper analysis and trend identification

• Utilize New Relic Synthetics for proactive monitoring and testing

• Implement New Relic Alerts to receive notifications

Negotiable based on market standards and job responsibilities

• Salary expectations are based on industry standards and the responsibilities of the role

• Open to discussing salary range during the interview process

• Looking for a competitive compensation package that aligns with my experience and skills

I want to join Mindtree because of its reputation for innovation and collaborative work culture.

• I am impressed by Mindtree's focus on cutting-edge technologies and solutions.

• I value the emphasis Mindtree places on teamwork and collaboration.

• I believe Mindtree offers a great platform for personal and professional growth.

• I am excited about the opportunity to work with a diverse and talented team at Mindtree.

Performance Testing Life cycle involves planning, preparation, execution, analysis, and reporting.

• 1. Planning: Define objectives, select tools, and create test plan.

• 2. Preparation: Set up test environment, create test scripts, and configure monitoring.

• 3. Execution: Run tests, monitor performance metrics, and collect data.

• 4. Analysis: Analyze results, identify bottlenecks, and optimize performance.

• 5. Reporting: Generate...read more

Correlation is used to handle dynamic values in scripts, while Parameterization is used to pass different values to the script.

• Correlation is used to extract dynamic values from server responses and replace them in subsequent requests.

• Parameterization is used to pass different sets of data to the script for testing different scenarios.

• Correlation is important for maintaining session integrity and ensuring accurate test...read more

Correlation is a statistical measure that describes the relationship between two variables.

• Correlation can range from -1 to 1, with 1 indicating a perfect positive correlation, -1 indicating a perfect negative correlation, and 0 indicating no correlation.

• Correlation does not imply causation, meaning just because two variables are correlated does not mean that one causes the other.

• For example, if there is a positive cor...read more