Quality and Testing Strategies

Question 1

6 ISO quality factors

Answer 1

functionality
reliability
usability
efficiency
maintainability
portability

Question 2

What is desk check?

Answer 2

informal checking of your code by yourself

Question 3

What is a code walkthrough

Answer 3

a formal line by line review of code with your team

Question 4

what is a code inspection

Answer 4

a a formal line by line review of a random subset of your code with your team

like a walkthrough except for subset of lines

Question 5

what is the 80/20 or Pareto rule?

Answer 5

80% of the bugs are found in 20% of the code

Question 6

what is DMAIC

Answer 6

define
measure
analyze 
improve
control

a method of SW QA

Question 7

what is the mean time between failures conceptually (MTBF)

Answer 7

the average amount of time that the system spends online (after a previous failure) before another failure occurs

Question 8

what is mean time to recovery conceptually (MTTR)

Answer 8

the average time it takes to get the system back online after a failure

Question 9

what is mean time to failure conceptually (MTTF)

Answer 9

the average time that elapses before the system fails after being recovered (brought back online after a previous failure)

Question 10

How to calculate mean time between failures (MTBF)

Answer 10

MTBF = MTTR + MTTF

Question 11

13 test types

Answer 11

unit test
integration test
smoke test (does the system boot up)
system test (SW and HW together)
verification & validation test
alpha test (someone in house)
beta test (users volunteer)
recovery test (inject faults)
penetration test
stress test (fake a lot of users)
performance test
config/deployment test (how it work in different environments)
regression test (re-testing of certain code to make sure that it was not affected by a bug fix someplace else)