3.1.12 Application Testing

Question 1

what is application testing?

Answer 1

using the application in controlled conditions to see how it works

Question 2

how to accurately test a solution:

Answer 2

you must have a good, clear specification before you start the design phase of a project

Question 3

what are the 3 reasons why the solution should be rigorously tested?

Answer 3

to make sure that:

• they meet the requirements outlined in the design
• the risk of failure due to bugs/ errors is reduced
• they work as expected

Question 4

what is unit/modular testing?

Answer 4

first case of testing, where units (functions and procedures) of code are checked individually

Question 5

who would normally carry out until testing?

Answer 5

developer or development team

Question 6

what is normal data?

Answer 6

data values in the acceptable range

Question 7

extreme data?

Answer 7

acceptable input data thats on the boundaries of the range

Question 8

erroneous data?

Answer 8

data outside the normal input range

Question 9

what is black box testing?

Answer 9

the tester ensures that the normal inputs produce the expected outputs.

tester doesn’t need understanding of the code

Question 10

what is white box testing?

Answer 10

tester needs to make sure each line of code operates satisfactorily and check that all branches throughout the software work as expected

tester needs to be skilled in creating software code

Question 11

what is a test plan?

Answer 11

a table of tests to be carried out with the data that will be used

Question 12

what is dry run testing?

Answer 12

program is tested without using a computer and running it on paper using hand calculation

Question 13

what is alpha testing?

Answer 13

carried out when the code is roughly ready. applied to off-the-shelf applications

Question 14

what s beta testing?

Answer 14

a version of the application is released to limited user groups independent of the development team

Question 15

what is verification?

Answer 15

testing whether the software performs against the criteria decided in advanced

Question 16

what is validation?

Answer 16

check that an application has been written correctly against a specification that has been agreed with the customer

Question 17

list 5 names that could head the columns of a test plan:

9incase they asked you to create a test plan)

Answer 17

1. test number
2. test title
3. test data
4. expected results
5. actual results

Question 18

advantages of unit testing {5}

Answer 18

• Problems are discovered early.
• Integration testing is easier.
• Acts as documentation of the system.
• Extremely accurate unit test coverage.
• The unit test itself is used to verify the design.

Question 19

disadvantages of unit testing {5}

Answer 19

• Time consuming.
• Does not show absence of errors.
• Hard to set up realistic tests.
• errors can be missed.
• Need to have a review process for test case failures.

Question 20

what is integration testing?

Answer 20

performed when all of the units are complete. This tests whether the units of code work together correctly.

Question 21

what is system testing?

Answer 21

done without having to have any knowledge of the code itself. This tests that the entire system functions correctly