testing

Question 1

What is white box testing

Question 3

What is white box testing

Answer 3

tests internal logic of a section of code to identify errors in syntax logic and data flow
tester needs to know how code works
white box tests carried out on units of code
tests cases should be built so that every statement is executed at least once

Question 4

What is a test case

Answer 4

Document that contains a set of tests to help the programmer verify that the code works as expected. it will include expected results and outcomes

Question 5

Advantages of white box testing

Answer 5

Thorough because allows each line of code to be tested
Hidden errors are identifie dand code is moified and optimised
Programmers who know code can easily identify suitable test data

Question 6

What is black box testing

Answer 6

Where tester is unaware of internal structure of application they are testing.
Used to identify errors in data structures, user interfaces, errors in reports, missing functionallityi and behaviour reports

Question 7

Disdavntages of white box testing

Answer 7

experience programmers are required
Large scale application require complex test cases (time consuming)
Some conditions may not be tested

Question 8

Advantages of black box testing

Answer 8

Can help identify where user requirements are not being met
testers don’t need to know about the code and testers can be independent of devleoper
Test cases can be designed as soon as the specificaiton for the unit is completed

Question 9

Disadvantages of black box testing

Answer 9

not all program pathways are tested as only a small number of input cases used
reason for a test failure can’t be determined
repeittion of tests already carried out by programmer may occur

Question 10

What is Unit testing

Answer 10

Testing one module or unit of code to ensure that it it s working as expected
Logic of code is tested
Form of white box testingW

Question 11

What is Integration testing

Answer 11

When a number of units have been tested they are combined together to form a sub-system. Integration testing ensures that all of the units work together correctly

Question 12

what is system testing

Answer 12

carried out on a complete and fully integrated system to ensure correct outputs are produced in compliance with user requirements document

Question 13

What is extreme data

Answer 13

used to test system can cope with very large or very small ddata values
Valid data used to test that the system operates as expected with normal data

Question 14

What is valid data

Answer 14

used to test system operates as expefcted with normal data

Question 15

What is invalid data

Answer 15

Used to test that system can process invalid data and doesn’t crash when entered

Question 16

What is null data

Answer 16

Used to test system can cope when no data entered