Testing and Documenting Solutions

Question 1

Which of the following names would be valid in LiveCode? (There may be more than one answer)

a) Student name
b) Studentname
c) Student_name
d) studentname

Answer 1

b, c and d.

Question 2

If you were storing a name what variable type would it be?

Answer 2

String Variable (text)

Question 3

Name the 3 types of testing data.

Answer 3

Normal, Extreme and Exceptional

Question 4

If a programme is checking scores on a test marked out of ten, and a score is entered which is 10, what type of testing data is this?

Answer 4

Extreme, because it is testing the boundaries.

Question 5

List examples of normal, extreme and exceptional data for a programme checking scores on a test marked out of 10.

Answer 5

Normal > 3, 7, 6
Extreme > 0, 10
Exceptional > 200, -30, 5.7, hello, 11

Question 6

Name the 3 types of errors.

Answer 6

Syntax error, Logic error, Execution/Runtime error.

Question 7

What is a Syntax error?

Answer 7

Where your code breakes a ‘rule’ of the coding language you are using. For example spelling mistakes of a key word or missing punctutation such as “”.

Question 8

What is a Logic error?

Answer 8

This is an error that causes the programme to operate incorrectly, but it will not crash. For example using and AND instead of an OR.

Question 9

What is an Execution/Runtime error?

Answer 9

This is an error when the programme is running, for example the user inputting the wrong type of variable, this will either cause the programme to crash or just to operate incorrectly.

Question 10

How can code be made more readable?

Answer 10

Indentation, white space, internal commentary (comments), meaningful varaiable names.

Question 11

What is internal commentary?

Answer 11

Internal commentary is comments in a code which make the code more readable for both the person who wrote it and others, it also makes it easier to identify where errors are.

Question 12

What is indentation?

Answer 12

Indentation is moving text slightly to the right so it is more readable.

Question 13

What is white space?

Answer 13

This

is white space. Leaving gaps in code up and down the way, like having returns between paragraphs.

Question 14

What are the differences between meaningful variable names and non meaningful variable names?

Answer 14

Pupil_Name P

Score 2

Question 15

How would you initialise a variable called “Student_Name” at the start of a LiveCode programme?

Answer 15

Put “” into Student_Name

Question 16

How would you ask and store someones name in LiveCode?

Answer 16

ask “Please enter your age.”

put it into Age

Question 17

How would you add a comment in LiveCode?

Answer 17

// This is a comment.

Question 18

Why should a programme be tested?

Answer 18

So you know there are no errors and the programme works as it should do.