Explanation/Reference:
Explanation:
Under the principle of separation of duties, an operator should not be performing data entry. This should be left to data entry personnel.
System operators represent a class of users typically found in data center environments where mainframe systems are used. They provide day-to-day operations of the mainframe environment, ensuring that scheduled jobs are running effectively and troubleshooting problems that may arise. They also act as the arms and legs of the mainframe environment, load and unloading tape and results of job print runs.
Operators have elevated privileges, but less than those of system administrators. If misused, these privileges may be used to circumvent the system's security policy. As such, use of these privileges should be monitored through audit logs.
Incorrect Answers:
A: Implementing the initial program load is a function that should be performed by an operator.
B: Monitoring execution of the system is a function that should be performed by an operator.
D: Controlling job flow is a function that should be performed by an operator.