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100 Words Every QA Tester Should Know

July 16, 2026

100 Words Every QA Tester Should Know

No. Item Definition
1. accessibility Usable by people with disabilities.
2. actual result What really happened.
3. alert Warning about a problem.
4. API Interface for software communication.
5. assertion Check that condition is true.
6. authentication Verifying identity.
7. authorization Granting allowed access.
8. automation Testing done by tools or scripts.
9. baseline Reference point for comparison.
10. black-box Testing without internal knowledge.
11. blocker Issue preventing further testing.
12. boundary value Edge input near limits.
13. branch Separate line of development.
14. bug A defect in software.
15. build Compiled version of software.
16. cache Stored data for faster access.
17. checklist List of items to verify.
18. closed Issue considered resolved.
19. compatibility Works across environments or devices.
20. cookie Small browser-stored data.
21. CPU usage Processor consumption level.
22. crash Unexpected program termination.
23. database Organized stored data system.
24. defect A flaw needing correction.
25. deployment Installing software into an environment.
26. downtime Time system is unavailable.
27. driver Code that calls a component.
28. duplicate Issue already reported elsewhere.
29. edge case Unusual condition at limits.
30. end-to-end Testing full user workflow.
31. endpoint Specific API access location.
32. environment System setup for testing.
33. equivalence partitioning Grouping similar input classes.
34. exception Runtime error event.
35. expected result What should happen.
36. exploratory testing Learning and testing simultaneously.
37. fail Test outcome differs from expectation.
38. fix Change that resolves a defect.
39. functional test Checks features against requirements.
40. gray-box Testing with partial internal knowledge.
41. happy path Normal successful user flow.
42. harness Framework supporting test execution.
43. heuristic Practical rule for testing.
44. hotfix Urgent fix for production.
45. incident Unexpected service disruption.
46. integration Combining components to work together.
47. internationalization Designing for many languages.
48. issue A problem or task record.
49. latency Delay before response starts.
50. load test Checks behavior under expected demand.
51. localization Adapting for language or region.
52. log Recorded system events or messages.
53. manual testing Testing performed by a person.
54. memory leak Unreleased memory usage growth.
55. merge Combining code branches.
56. mitigation Action reducing risk.
57. mock Fake object for testing.
58. monitoring Watching system behavior continuously.
59. negative testing Testing invalid or unexpected input.
60. open Issue awaiting action.
61. oracle Source of expected behavior.
62. pass Test outcome meets expectation.
63. patch Small software fix update.
64. payload Data carried in a message.
65. performance Speed and responsiveness.
66. postmortem Review after an incident.
67. priority Urgency for fixing an issue.
68. production Live environment for real users.
69. query Request for data.
70. regression Old functionality breaks after changes.
71. release Version delivered to users.
72. reliability Consistent correct operation over time.
73. reproduce Cause the issue again reliably.
74. requirement A needed feature or condition.
75. retest Testing after a fix.
76. rollback Reverting to a previous version.
77. root cause Underlying reason for a problem.
78. sanity test Quick check after small changes.
79. scalability Handles growth in workload.
80. scenario A realistic usage situation.
81. security Protection against threats and misuse.
82. severity Impact level of a defect.
83. smoke test Basic check of core functions.
84. stability Ability to run without crashing.
85. stress test Checks behavior under extreme demand.
86. test case A specific scenario to verify.
87. test coverage Extent code or features tested.
88. test data Input values used in tests.
89. test plan Document outlining testing approach.
90. test script Written steps for testing.
91. test suite Collection of related tests.
92. ticket Tracked work item or issue.
93. traceability Linking tests to requirements.
94. uptime Time system stays available.
95. usability Ease of use.
96. validation Checking product meets user needs.
97. verification Checking work meets requirements.
98. vulnerability Weakness that can be exploited.
99. white-box Testing with internal knowledge.
100. workaround Temporary way to avoid issue.
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