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12.
Explain the following types of computer program errors:
a)
Syntax error
(2mks)
These are programming errors/mistakes that occur due to incorrect/improper use
of the grammatical rules of a particular language
E.g., Punctuation mistakes, (i.e. omitting a comma or a semicolon), improper
naming of variables, wrong spellings of user defined and reserved words.
b)
Logical Errors
These are errors that occur as a result of bad program design
Logical errors relate to the logic of processing followed in the program to
get the desired results e.g. they may occur as a result of misuse of logical
operators.
c)
Run-time (execution) error.
(2mks)
Run-time (execution) errors. They occur when the programmer develops
statements, which are not projecting towards the desired goal. Such statements
will create deviations from the desired objectives
13.
Explain four error detecting methods in program development (4mks)
i)
Dry running (desk checking); - checking a program for errors by
making the corrections on a paper before entering it in the program editor.
ii)
Translator system checking: - It involves the running of a translator
program (e.g., compiler or Interpreter) after entering the set of coded
instructions in order to detect any syntax errors.