Other Oracle processes - Quiz Explanation

The correct answers are indicated below, along with text that explains the correct answers.
 
1. You list the processes running for your database and see one named LCK4. What is the function of that process?
Please select the best answer.
  A. It is one of the Lock processes used by the log writer.
  B. It's a Lock Manager process used to secure private data.
  C. It is a Lock Manager process used for inter-instance locking.
  D. It's a Lock process started by Oracle in response to an intrusion.
  The correct answer is C.
LCK# processes are used by the Parallel Server option for inter-instance locking.

2. Which of the following processes would be responsible for running a scheduled database job?
Please select the best answer.
  A. JMN0
  B. JMON
  C. SNP0
  D. SMON
  The correct answer is C.
The SNP# processes keep track of database jobs created with the DBMS_JOBS package, and run them as scheduled.

3. Which process is used for the Advanced Queueing option?
Please select the best answer.
  A. ADQ0
  B. AQNG
  C. QMON
  D. AMON
  The correct answer is C.
QMON is an acronym for Queue Monitor, which is the process that implements the Advanced Queueing features.