Candidates are accepted for employment if their qualifications and reference are satisfactory.
If they pass the interview and the qualifications or reference (but not both) are unsatisfactory, a

job for probationary period is offered. In all other circumstances the candidate's application is rejected.

a) Construct a decision table for the above policy.

b) Identify any THREE internal and THREE external factors that could trigger a systems request?

c) There are generally FOUR symbols used to construct data flow diagrams. Describe them.