Software Testing Interview Questions

Software Testing Basics

· In which Software Life cycle phase does testing occur?
· Can you explain PDCA cycle and where does testing fit?
· What is the difference between white box, black box and gray box testing?
· Define Defect?
· What is the difference between Defect and Failure?
· What are the broader categories of defects?
· What is the difference between Verification and Validation?
· How does testing affect risk?
· Does Increase in testing always mean good to the project?
· As a manager what process did you adopt to define testing policy?
· Should testing be only after build and execution?
· Are number of defects more in design phase or coding phase?
· What kind of inputs do we need from the end user to start proper testing?
· What is the difference between Latent and Masked Defect?
· A defect which could have been removed during initial stage is removed in later
stage how does it affect cost?
· In testing can you explain the concept of work bench?
· What's the difference between Alpha and Beta testing?
· Can you explain the concept of defect cascading?
· Can you explain how one defect leads to other defects?
· Can you explain what is Usability testing?
· What are the different strategies of rollout to the end users?
· Can you explain requirement traceability and its importance?
· What is the difference between Pilot and Beta testing?
· How will you do a risk analysis during software testing?
· How do you conclude which section is most risky in your application?
· What does entry and exit criteria mean in a project?
· On what basis is the Acceptance plan prepared?
· What's the relation between environment reality and test phases?
· What are different types of verifications?
· What's the difference between Inspections and Walkthroughs?
· Can you explain regression testing and confirmation testing?
· What do you mean by coverage and what are the different types of coverage
· How does fundamentally a coverage tool work?
· What is configuration management?
· Can you explain the concept of baseline in software development?
· What are the different test plan documents in project?
· How do test documents in a project span across software development life cycle?
· Can you explain inventories?
· How do you do Analysis and design for testing projects?
· Can you explain calibration?
· Which test cases are first written white boxes or black box?
· Can you explain Co-habiting software?
· What different impact rating's you have used in your project?
· Can you explain what a test log is?
· Explain SDLC (Software development Life Cycle) in detail?
· Can you explain waterfall model?
· Can you explain big-bang waterfall model?
· Can you explain phased waterfall model?
· Explain Iterative model, Incremental model, Spiral model, Evolutionary model
and V-Model?
· Explain Unit testing, Integration tests, System testing and Acceptance testing?
· What's the difference between system and acceptance testing?
· Which is the best model?
· What group of teams can do software testing?

Testing techniques

· Can you explain boundary value analysis?
· What is BV in software testing?
· Can you explain Equivalence partitioning?
· Can you explain how state transition diagram can be helpful during testing?
· Can you explain random testing?
· Can you explain monkey testing?
· What is negative and positive testing?
· Can you explain exploratory testing?
· What exactly are semi-random test cases?
· Can you explain the concept of orthogonal array?
· Can you explain pair-wise defect fundamental?
· Can you explain the concept of decision tables?
· How did you define severity ratings in your project?

Software process

· What is a Software process?
· What are the different cost element involved in implementing process in an
· What is a model?
· What is maturity level?
· Can you explain the concept of process area in CMMI?
· Can you explain the concept of tailoring?


· What is CMMI and what's the advantage of implementing CMMI in an
· What's the difference between implementation and Institutionalization?
· What are different models in CMMI?
· Can you explain staged and continuous models in CMMI?
· Can you explain the different maturity levels in staged representation?
· Can you explain capability levels in continuous representation?
· Which model should we use and under what scenarios?
· How many process areas are present in CMMI and in what classification do they
fall in?
· What the difference between every level in CMMI?
· What different sources are needed to verify authenticity for CMMI
· Can you explain SCAMPI process?
· How is appraisal done in CMMI?
· Which appraisal method class is the best?
· Can you explain the importance of PII in SCAMPI?
· Can you explain implementation of CMMI in one of the Key process areas?
· Explanation of all process areas with goals and practices?
· Can you explain the process areas?

Six Sigma

· What is six sigma?
· Can you explain the different methodology for execution and design process in
SIX sigma?
· What does executive leaders, champions, Master Black belt, green belts and black
belts mean?
· What are the different kinds of variations used in six sigma?
· Can you explain the concept of standard deviation?
· Can you explain the concept of fish bone/ Ishikawa diagram?
· Can you explain QFD?
· Can you explain FMEA?
· Can you explain X bar charts?
· Can you explain Flow charting and brain storming?


· What is meant by measure and metrics?
· Can you explain Number of defects measure?
· Can you explain number of production defects measure?
· Can you explain defect seeding?
· Can you explain DRE?
· Can you explain Unit and system test DRE?
· How do you measure test effectiveness?
· Can you explain Defect age and Defect spoilage?

Automated Testing

· What are good candidate for automation in testing?
· Does automation replace manual testing?
· Which automation tool have you worked and can you explain them in brief?
· Can you explain how does load testing conceptually work for websites?
· Can you explain how did you perform load testing using tool?
· What does load test summary report contain?
· Can you explain the concept of data-driven testing?
· Can you explain table-driven testing?
· How can you perform data-driven testing using Automated QA?

Testing Estimation

· What are the different ways of doing black box testing?
· Can you explain TPA analysis?
· Can you explain in brief Function points?
· Can you explain the concept Application boundary?
· Can you explain the concept of elementary process?
· Can you explain the concept of static and dynamic elementary process?
· Can you explain concept of FTR, ILF, EIF, EI, EO, EQ and GSC?
· How can you estimate number of acceptance test cases in a project?
· Can you explain on what basis does TPA actually work?
· How did you do estimation for black box testing?
· How did you estimate white box testing?
· Is there a way to estimate acceptance test cases in a system?

For more on Software Manual Testing Interview Questions :

For more articles on Manual Testing Log On to Manual Testing Articles


  1. Thank you for sharing this helpful interview questions.

    Interview Questions

  2. Please visit the following URL for quick reference:

  3. Thanks for sharing great stuff.
    Please visit the following URL's for your reference.