Which three statements are true about a job chain?
A. It can contain a nested chain of jobs.
B. It can be used to implement dependency-based scheduling.
C. It cannot invoke the same program or nested chain in multiple steps in the chain.
D. It cannot have more than one dependency.
E. It can be executed using event-based or time-based schedules.
Answer: A,B,E
Your database instance is started by using a server parameter file (SPFILE). You execute
the following command to change the value of the LOG_BUFFER initialization parameter:
ALTER SYSTEM SET LOG_BUFFER=32 M;
What is the outcome of this command?
A. The parameter value is changed and it comes into effect as soon as space becomes available in the SGA.
B. Itreturns an error because the value of this parameter cannot be changed dynamically.
C. The parameter value is changed and it comes into effect at the next instance startup.
D. It returns an error becauseSCOPEshould be set toMEMORY.
Answer: B
