One of the steps in assessing control risk is to identify necessary controls intended to prevent data from being lost, added, duplicated, or altered during computer processing. An example of this type of control is the:

$($a$)$ Use of control totals, limit and reasonableness checks, and sequence tests.

$($b$)$ Internal verification of proper authorization, testing, and documentation of program changes before implementation.

$($c$)$ Authorization and approval of data in user departments and screening of data by data control groups.

$($d$)$ Use of external and internal file labels.

Which of the following internal control activities is not usually performed in the vouchers payable department?

$($a$)$ Indicating the asset and expense accounts to be debited.

$($b$)$ Approving vouchers for payment by having an authorized employee sign the vouchers.

$($c$)$ Matching the vendor's invoice with the related receiving report.

$($d$)$ Accounting for unused prenumbered purchase orders and receiving reports.

Which of the following is not an important element in deciding whether to lease or purchase computer equipment?

$($a$)$ Maintenance expense.

$($b$)$ Cost of money.

$($c$)$ Parallel operations cost.

$($d$)$ Tax considerations.

A systems analyst is currently involved in the hiring and training of new employees and the testing of new procedures. In which stage of the systems development cycle is the analyst?

$($a$)$ Analysis.

$($b$)$ Implementation.

$($c$)$ Detailed design.

$($d$)$ Conceptual design.

Checking to see if a new system is doing what it is supposed to do is part of:

$($a$)$ Systems implementation.

$($b$)$ Systems operation.

$($c$)$ Systems maintenance.

$($d$)$ Post implementation review.