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Top 100 Frequently asked Software Testing Interview Questions - Part 2

Top 100 Frequently asked Software Testing Interview Questions and Answers - Part 2

51. When should testing be stopped?

It depends on the risks for the system being tested.  

52. Which of the following is the main purpose of the integration strategy for integration testing in the small?

To specify which modules to combine when, and how many at once.

53. What is the purpose of a test completion criterion?

To determine when to stop testing  

54. Given the following code, which statement is true about the minimum number of test cases required for full statement and branch coverage?

     Read p
     Read q
     IF p+q> 100
          THEN Print "Large"
    IF p > 50
          THEN Print "p Large"

1 test for statement coverage, 2 for branch coverage

55. What is the difference between re-testing and regression testing?

Re-testing ensures the original fault has been removed; regression testing looks for unexpected side-effects.  

56. Which review is normally used to evaluate a product to determine its suitability for intended use and to identify discrepancies?

Technical Review.

57. Why we use decision tables?.

The techniques of equivalence partitioning and boundary value analysis are often applied to specific situations or inputs. However, if different combinations of inputs result in different actions being taken, this can be more difficult to show using equivalence partitioning and boundary value analysis, which tend to be more focused on the user interface. The other two specification-based tech-niques, decision tables and state transition testing are more focused on business logic or business rules. A decision table is a good way to deal with combinations of things (e.g. inputs). This technique is sometimes also referred to as a 'cause-effect' table. The reason for this is that there is an associated logic diagramming technique called 'cause-effect graphing' which was sometimes used to help derive the decision table

58. Faults found should be originally documented by who?

By testers.  

59. Which is the current formal world-wide recognized documentation standard?

There isn’t one.  

60. Which of the following is the review participant who has created the item to be reviewed?


61. A number of critical bugs are fixed in software. All the bugs are in one module, related to reports. The test manager decides to do regression testing only on the reports module.

Regression testing should be done on other modules as well because fixing one module may affect other modules.

62. Why does the boundary value analysis provide good test cases?

Because errors are frequently made during programming of the different cases near the ‘edges’ of the range of values.  

63. What makes an inspection different from other review types?

It is led by a trained leader, uses formal entry and exit criteria and checklists.

64. Why can be tester dependent on configuration management?

Because configuration management assures that we know the exact version of the testware and the test object.

65. What is a V-Model ?
A software development model that illustrates how testing activities integrate with software development phases

66. What is maintenance testing?

Triggered by modifications, migration or retirement of existing software  

67. What is test coverage?

Test coverage measures in some specific way the amount of testing performed by a set of tests (derived in some other way, e.g. using specification-based techniques). Wherever we can count things and can tell whether or not each of those things has been tested by some test, then we can measure coverage.  

68. Why is incremental integration preferred over “big bang” integration?

Because incremental integration has better early defects screening and isolation ability  

69. When do we prepare RTM (Requirement traceability matrix), is it before test case designing or after test case designing?

The would be before. Requirements should already be traceable from Review activities since you should have traceability in the Test Plan already. This question also would depend on the organisation. If the organisation do test after development started then requirements must be already traceable to their source. To make life simpler use a tool to manage requirements.

70. What is called the process starting with the terminal modules ?

Bottom-up integration  

71. During which test activity could faults be found most cost effectively?

During test planning  

72. The purpose of requirement phase is

To freeze requirements, to understand user needs, to define the scope of testing

73. How much testing is enough?

The answer depends on the risks for your industry, contract and special requirements 74. Why we split testing into distinct stages? Each test stage has a different purpose.

75. Which of the following is likely to benefit most from the use of test tools providing test capture and replay facilities?

a) Regression testing
b) Integration testing
c) System testing
d) User acceptance testing

Regression testing  

76. How would you estimate the amount of re-testing likely to be required?

Metrics from previous similar projects and discussions with the development team

77. What studies data flow analysis ?

The use of data on paths through the code.

78. What is Alpha testing?

Pre-release testing by end user representatives at the developer’s site.

79. What is a failure?

Failure is a departure from specified behaviour.  

80. What are Test comparators ?

Is it really a test if you put some inputs into some software, but never look to see whether the software produces the correct result? The essence of testing is to check whether the software produces the correct result, and to do that, we must compare what the software produces to what it should produce. A test comparator helps to automate aspects of that comparison.

81. Who is responsible for document all the issues, problems and open point that were identified during the review meeting


82. What is the main purpose of Informal review

Inexpensive way to get some benefit  

83. What is the purpose of test design technique?

Identifying test conditions and Identifying test cases

84. When testing a grade calculation system, a tester determines that all scores from 90 to 100 will yield a grade of A, but scores below 90 will not. This analysis is known as:

  Equivalence partitioning  

85. A test manager wants to use the resources available for the automated testing of a web application. The best choice is

Tester, test automater, web specialist, DBA

86. During the testing of a module tester ‘X’ finds a bug and assigned it to developer. But developer rejects the same, saying that it’s not a bug. What ‘X’ should do?

Send to the detailed information of the bug encountered and check the reproducibility

87. A type of integration testing in which software elements, hardware elements, or both are combined all at once into a component or an overall system, rather than in stages.

Big-Bang Testing  

88. In practice, which Life Cycle model may have more, fewer or different levels of development and testing, depending on the project and the software product. For example, there may be component integration testing after component testing, and system integration testing after system testing.


89. Which technique can be used to achieve input and output coverage? It can be applied to human input, input via interfaces to a system, or interface parameters in integration testing.

Equivalence partitioning  

90. “This life cycle model is basically driven by schedule and budget risks” This statement is best suited for…


91. In which order should tests be run?

The most important tests first  

92. The later in the development life cycle a fault is discovered, the more expensive it is to fix. why?

The fault has been built into more documentation,code,tests, etc  

93. What is Coverage measurement?

It is a partial measure of test thoroughness.  

94. What is Boundary value testing?

Test boundary conditions on, below and above the edges of input and output equivalence classes.

95. What is Fault Masking ?

Error condition hiding another error condition.

96. What does COTS represent?

Commercial Off The Shelf.  

97.The purpose of wich is allow specific tests to be carried out on a system or network that resembles as closely as possible the environment where the item under test will be used upon release?

Test Environment

98. What can be though of as being based on the project plan, but with greater amounts of detail?

Phase Test Plan  

99. What is exploratory testing?

  Exploratory testing is a hands-on approach in which testers are involved in minimum planning and maximum test execution. The planning involves the cre-ation of a test charter, a short declaration of the scope of a short (1 to 2 hour) time-boxed test effort, the objectives and possible approaches to be used. The test design and test execution activities are performed in parallel typi-cally without formally documenting the test conditions, test cases or test scripts. This does not mean that other, more formal testing techniques will not be used. For example, the tester may decide to use boundary value analysis but will think through and test the most important boundary values without necessarily writing them down. Some notes will be written during the exploratory-testing session, so that a report can be produced afterwards.  

100. What is failure?

Deviation from expected result to actual result

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