Programming for test

Question 1

Why would a developer who knows high and low-level programming choose to use high-level programming?

Answer 1

• High-level languages have built-in functions and libraries
• High-level languages have more support/help
• High-level languages have structures (such as selection and iteration)
• High-level languages can be less machine-dependent/more portable and they are more compatible
• requires fewer lines of code to be written
• It is (usually) quicker to develop code in high-level languages
• It is easier to find mistakes in code
• The code is easier to maintain//understand
• It is easier to structure code in high-level languages

Question 2

What tests can a developer use to improve testing of their code?

Answer 2

• could be tested with only 1s
• It could be tested with different lengths of input
• It could be tested with an input where the 1s and 0s vary
• It could be tested with an input where the last two numbers are different
• It could be tested with the empty string
• It could be tested with a string of length one
• It could be tested with two runs of 0s separated by a run of 1s / two runs of 1s separated by a run of 0s
• It could be tested with invalid data (such as 1010abc

Question 3

What only applies to local variables?

Answer 3

• is only accessible//declarable//within scope (in the subroutine)
• only exists while the subroutine/program block is executing

Question 4

How do developers use structured programming?

Answer 4

• subroutines with parameters = more readible
• parameter within subroutines = reused
• iteration = more efficient
• indentation

Question 5

Explain how the developer could use a combination of an array and records to store information about music records:

Answer 5

• put each song in a record with the song title + datatype of each field
• assign it to a variable named song 1 song 2 etc.
• as they have the same record structure = collect them in an array
• array name should be something like song_progranm_array