programming stuff

Question 1

range check

Answer 1

checking if the data entered is within the allowed range

Question 2

type check

Answer 2

checking that data is of the right type, such as integer, letter or text

Question 3

length check

Answer 3

Text entered is not too long or too short – for example, a password is between 8 and 15 characters

Question 4

prescence check

Answer 4

Checks that data has been entered, i.e. the field has not been left blank

Question 5

format check

Answer 5

Checks that the format of, for example, a postcode or email address is correct

Question 6

validation vs verification

Answer 6

Validation can only check that the data entered is reasonable
Verification is used to double-check that the data has been typed in correctly

Question 7

normal data

Answer 7

Typical data that a program expects

Question 8

Erroneous data

Answer 8

The data that is Not accepted by the problem

Question 9

Boundary data

Answer 9

The data that is on the border of being allowed and not allowed by program

Question 10

Extreme data

Answer 10

Data that is invalid and not allowed 

Question 11

What is the difference between erroneous data and extreme data?

Answer 11

There is no difference

Question 12

Boundary erroneous data

Answer 12

Data on the border which is not allowed

Question 13

valid data

Answer 13

data in the range accepted by the program

Question 14

invalid data

Answer 14

data not in the range accepted by the program

Question 15

boundary valid data

Answer 15

data which is on the edge of the range, but is accepted by the program

Question 16

three advantages of subroutines (3)

Answer 16

• code can be developed in isolation
• easier to program with a team
• easier to find and fix mistakes
• easier to reuse code
• code is easier to understand