How to Find a Bug in Application? Tips and Tricks

How to Find a Bug in Application? – A very good and important point. Right?

If you are a Software Tester or a QA Engineer, then each and every minute you must think to find a bug in an application. And you should be!

You might think finding a Blocker Bug like any System Crash is often rewarding! But, I don’t think like that. You should try to find out the bugs that are most difficult to find and those always mislead users.

How to Find a Bug in Application_

Finding such subtle bugs is the most challenging work, and it gives you the satisfaction of your work. Also, it should be rewarded by seniors. Let me share my experience of one such subtle bug that was not only difficult to catch, but was difficult to reproduce as well.

I was testing one module from my search engine project. I do most of the activities of this project manually, as it is slightly complex to automate. That module comprises traffic and revenue stats of different affiliates and advertisers. So testing such reports is always a difficult task.

When I tested this report, it showed that the data was accurately processed for some time, but when tried to test again after some time it was showing misleading results. It was strange and confusing to see the results.

There was a Cron (Cron is an automated script that runs after a specified time or condition) to process the log files and update the database. Such multiple crops are running on log files and DB to synchronize the total data.

There were two Crons running on one table with some time intervals.

There was a column in the table that was getting overwritten by other Cron making some data inconsistency. It took us a long time to figure out the problem because of the vast DB processes and different Crons.

My point is trying to find out the hidden bugs in the system that might occur for special conditions and causes a powerful impact on the system. You can find such a bug with some tips and tricks.

Here are those Tips:

#1) Understand the whole application or module in depth before starting the testing.

#2) Prepare good Test Cases before starting with testing. I mean give stress on the functional test cases, which include the major risk of the application.

#3) Create sufficient Test Data before tests. This dataset includes the test case conditions and also the database records if you are going to test DB related application.

#4) Perform repeated tests with different Test Environments.

#5) Try to find out the resulting pattern and then compare your results with those patterns.

#6) When you think that you have completed most of the test conditions and when you think you are tired somewhat, then do some Monkey Testing.

#7) Use your previous Test Data pattern to analyze the current set of tests.

#8) Try some Standard Test Cases for which you found the bugs in some different application. Like if you are testing the input text box, try inserting some HTML tags as the inputs and see the output on the display page.

#9) Last and the best trick is to try very hard to find the bug. As if you are testing only to break the application!

We will include more tips in our upcoming posts. Meantime you can share more tips in the comments section here.

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142 thoughts on “How to Find a Bug in Application? Tips and Tricks”

  1. What is difference between Performance Testing, Load Testing and Stress Testing?

    1) Performance Testing:

    What is performance testing?

    Performance testing is the testing, which is performed, to ascertain how the components of a system are performing, given a particular situation. Resource usage, scalability and reliability of the product are also validated under this testing. This testing is the subset of performance engineering, which is focused on addressing performance issues in the design and architecture of software product.

    Performance Testing Goal:

    The primary goal of performance testing includes establishing the benchmark behaviour of the system. There are a number of industry-defined benchmarks, which should be met during performance testing.

    Performance testing does not aim to find defects in the application, it address a little more critical task of testing the benchmark and standard set for the application. Accuracy and close monitoring of the performance and results of the test is the primary characteristic of performance testing.


    For instance, you can test the application network performance on Connection Speed vs. Latency chart. Latency is the time difference between the data to reach from source to destination. Thus, a 70kb page would take not more than 15 seconds to load for a worst connection of 28.8kbps modem (latency=1000 milliseconds), while the page of same size would appear within 5 seconds, for the average connection of 256kbps DSL (latency=100 milliseconds). 1.5mbps T1 connection (latency=50 milliseconds) would have the performance benchmark set within 1 second to achieve this target.

    For example, the time difference between the generation of request and acknowledgement of response should be in the range of x ms (milliseconds) and y ms, where x and y are standard digits. A successful performance testing should project most of the performance issues, which could be related to database, network, software, hardware etc…


    2) Load Testing:

    Load testing is meant to test the system by constantly and steadily increasing the load on the system till the time it reaches the threshold limit. It is the simplest form of testing which employs the use of automation tools such as LoadRunner or any other good tools, which are available. Load testing is also famous by the names like volume testing and endurance testing.

    The sole purpose of load testing is to assign the system the largest job it could possible handle to test the endurance and monitoring the results. An interesting fact is that sometimes the system is fed with empty task to determine the behaviour of system in zero-load situation.

    Load Testing Goal:

    The goals of load testing are to expose the defects in application related to buffer overflow, memory leaks and mismanagement of memory. Another target of load testing is to determine the upper limit of all the components of application like database, hardware and network etc… so that it could manage the anticipated load in future. The issues that would eventually come out as the result of load testing may include load balancing problems, bandwidth issues, capacity of the existing system etc…


    For example, to check the email functionality of an application, it could be flooded with 1000 users at a time. Now, 1000 users can fire the email transactions (read, send, delete, forward, reply) in many different ways. If we take one transaction per user per hour, then it would be 1000 transactions per hour. By simulating 10 transactions/user, we could load test the email server by occupying it with 10000 transactions/hour.


  2. Hi,

    I am into storage domain and I am doing regression testing on various NAS products, my client always expects to find more and more bugs on daily basis. In regression its very difficult to find the bug. any other way so that find some bugs in the product.

  3. hello every one,
    is there any tool for manual testing?

    i think HP SPRINTER is there,can any one plz tell me how can i utilyze it.

  4. Hello,
    I am manual tester please suggest me which automation testing tool is good for beginner and how can I learn it.

    • give u r mobile number i wil clarify u r doubt. (or)contact me i am perundurai don
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  5. as a fresher how to find the bugs in mobile Testing .If anyone knows please guide me

    • Hii Shrimukha
      If you find bugs in mobile, firstly you can check page browsers responsive mode and select the mobile device. You have completed responsive testing then you can check this page in mobile device.

  6. how to find a bug in a application testing.if anyone knows how to find a bug so pls guide me.

  7. Need more guidance on this

  8. can any one tell some ecommerce bugs that you come across

  9. Hai,
    I am new to testing ,please help me to find issues and bugs in an application

    • sunitha same to you i have open in watsapp group you have join?

      • i want to join it
        i want to became se at google

      • join me also in watsapp group im need help in manual testing,,

    • Even myself a fresher in manual testing field.. Can anyone please help me with this.It will be very thankful for me to survive in my project.

  10. hi if you want to hack of any site in world come on and see me in my telegram by free educate
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  11. hi varun

    how to create test case efficently and differently evrytime?

  12. Hi Vijay,

    It would be very helpful for me if you provide some docs, knowledge on Supply Chain, logistics, E-commerce domain. Also, the career growth in these domains for a tester when compared to BFSI or healthcare domain.

  13. Could you please anyone suggests me the app which contains bugs.

  14. so wouldn’t the first step be testing xss like alert(“Hello”);

  15. Hello,
    I am manual tester please suggest me which automation testing tool is good for beginner and how can I learn it.

  16. Could you help to explain this content for me?
    I mean give stress on the functional test cases which includes major risk of the application.
    => The word “give stress” here means the tester must try his/her best to create functional testcase? or must add testcases for testing stress of system with functional testcases?

  17. i have recently joined a company.we got should be handle by me.

    can any body should i start and how will be testing process in real time. which i read from material will be differ from real time testing..

  18. To test any software you first need to understand the functionality of product or module.

  19. how to start testing with the help of “you tube “videos I wanted to know the basics oftesting on websites

  20. I am a beginner in testing please prescribe me to how to start from begin

  21. I am new to testing, is there a forum to connect and learn more?
    I need a coach & mentor, please.

    WhatsApp +2348100353435

  22. You guys are thirstier than a fifth grader at a high school prom.

  23. i am new in testing filed if there is any form to content and learn more i need a trainer.

    Whatsup no. +918879470539

  24. I am new to testing, is there a forum to connect and learn more?
    I need a coach & mentor, please.

    WhatsApp +2348160475707

  25. I am very new to testing please if anybody could help me then what’s app ?? 9347950740
    Like a mentor

  26. hi ,i am new to testing environment can anyone provide me so bug finding technic IN SIMPLE BANKING DOMAIN

  27. This is a very old school way of thinking. If you were following agile principles you would be testing throughout the sprint and the whole team would be responsible, not just the tester. Having the testers effectively acting as gatekeepers creates a divide within the team and promotes silos. Have a good user story with clear acceptance criteria means that testing can be done asd the code is being developed. If you are doing all the code before and then ‘throwing it over the wal’l to testers.

  28. I too really want to knw hw to find bug in jumia website please help me sir

  29. please send me some doc for Application support troubleshooting
    Need to crack this interview JD

    whatsapp no. 9899148314

  30. HI Team , I want some docs of application troubleshooting , PLease send me on my wtsapp no. 9899149314

    Need to crack below JD :

    Duties & Responsibilities
    Investigate the issue and Provide Resolution (where is the issue – device/connectivity/platform/application layer)
    Application & Platform Performance Monitoring
    Identify, categorize, prioritize, diagnose, route, track, and close the alarms raised by monitoring tools
    Recreate and verify complex performance and environmental issues with full access to the production environment
    To identify, troubleshoot and solve incidents within SLA timelines
    Log Analysis of the issues reported
    Update tickets recent status and progress on ticketing tool
    Raise a bug for issue in application functionality where a code fix might be needed

  31. we have a Tool Anuvadak which generates Test script for your Code automatically and Test case with specification,Technology specific Test case,script library available ,Lets know pain points and needs ,we can add up more,want to enquire about Anuvadak VTITG reachout to votarytech


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