66 QA interview questions and answers(Part 4)

Q39. How to Estimate Testing effort ?

Time Estimation method for Testing Process:
Step 1 : count number of use cases (NUC) of system
Step 2 : Set Avg. Time Test Cases(ATTC) as per test plan
Step 3 : Estimate total number of test cases (NTC)
Total number of test cases = Number of Use Cases X Avg. Test Cases per a use case
Step 4 : Set Avg. Execution Time (AET) per a test case
Step 5 : Calculate Total Execution Time (TET)
TET = Total number of test cases * AET
Step 6 : Calculate Test Case Creation Time (TCCT)
usually we will take 1.5 times of TET as TCCT
TCCT = 1.5 * TET
Step 7 : Time for Re-Test Case Execution (RTCE) this is for retesting
usually we take 0.5 times of TET
RTCE = 0.5 * TET
Step 8 : Set Report generation Time (RGT
usually we take 0.2 times of TET
RGT = 0.2 * TET
Step 9 : Set Test Environment Setup Time (TEST)
it also depends on test plan
Step 10 : Total Estimation time = TET + TCCT+ RTCE + RGT + TEST + some buffer.

Q40. How to create requirements test matrix template?

For a requirements test matrix template we perform following step:
Step 1: Find out number of requirements.
Step 2: Find out number of test cases.
Step 3: Create a table based on these. Let we have 10 requirements and 40 test cases, then we create a table of 11 rows and 41 columns.
Step 4: On the first column of table copy all your 10 requirement numbers, and paste them into rows 2 through 11 of the table.
Step 5: Now copy all 40 test case numbers, and paste them into columns 2 through 41 of the table.
Step 6: Examine each of your 40 test cases, determine which of the 10 requirements they satisfy.

Q41. Can you perform regression testing performed manually?

Yes we can perform regression testing manually, but it requires lots of effort. To choose the way of doing the regression testing is totally depends on the initial testing approach. If the initial testing approach was manual testing, then the regression testing is usually performed manually. In case, if the initial testing approach was automated testing, then the regression testing is usually performed by automated testing. Automated regression testing is very easy task.

Q42. You are a tester. Now How will you choose which defect to remove in 1000000 defects?

First thing testers are not responsible for fixing the bug they are only responsible for debugging the bug and prioritizing those bugs. These bugs are now reported in bug report template with the severity and priority of the bug. Tester assigns severity level to the defects depending upon their impact on other parts of application. Every bug has its severity and priority values assign by tester. If a defect does not allow you to go ahead and test the product, it is critical one so it has to be fixed as soon as possible. We have 5 levels as:
  • Critical
  • High
  • Medium
  • Low
  • Cosmetic

Q43.How do you perform integration testing?

Integration testing is black box testing. Integration testing focuses on the interfaces between units, to make sure the units work together. For integration testing we ensure that all units testing of the each component is performed earlier. Integration testing begins only after the unit testing. The purpose of integration testing is to ensure different components of the application interact with each other. So that, components work as per the customer requirements. Test cases are developed with the purpose of exercising the interfaces between the components. Integration testing is considered complete, when actual results and expected results are same.

Q44. What is the testing lifecycle?

There is no standard testing life cycle, but it is consist of following phases:
  • Test Planning (Test Strategy, Test Plan, Test Bed Creation)
  • Test Development (Test Procedures, Test Scenarios, Test Cases)
  • Test Execution
  • Result Analysis (compare Expected to Actual results)
  • Defect Tracking
  • Reporting

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