Programming theory

Question 1

Name and explain the type of errors

Answer 1

1. Logic error: Complier can understand, but returns an undesired result
2. Runtime error: Complier can understand the code, however is unable to execute the code, resulting in an unexpected exit during execution
3. Syntax error: Complier unable to understand, and thus unable to execute

Question 2

Name and explain the types of test cases

Answer 2

1. Normal test: input which programs expects to encounter and handle
2. Abnormal test: input which falls outside the set of acceptable values and program expected to raise an error message/handle the error
3. Extreme test: input which falls at the extreme ends of the acceptable set of values, where special handling could be required

Question 3

What is data validation?

Answer 3

Data verification checks that data entered meets a set of requirements before further processing

Question 4

What is data verification?

Answer 4

Data verification ensures that data entered is what the user intended to enter

Question 5

State the techniques of data validation

Answer 5

1. Range check
2. Format check
3. Length check
4. Presence check
5. Check digit

Question 6

State the techniques of data verification

Answer 6

1. Double entry
2. Visual Check