Need to have 4 DBA/IT questions answered. They are 300 words each and they all must have at least 2 references each. ThanksTask 1: 300 words with 2-3 references

Topic 1: Unix Linux Commands
Based on the OS you are using various commands used to monitor Oracle.  For example,  ‘ps -ef | grep pmon’ can be used via a Unix/Linux system to determine if the process is running.  Describe 2 commands and identify the scenarios in which these commands can be used. 

Task 2: 300 words with 2-3 references

Topic 2: Statistics for Analyzing Performance
As a DBA you should keep statistics to analyze the database for bottlenecks and performance issues. Alapati mentions two types of statistics, cumulative statistics and database metrics. Explain what they mean to you. Describe two features found in the Oracle Diagnostics Pack and explain how they would help you monitor performance in Oracle Database 12c. 

Task 3: 300 words with 2-3 references

Topic 1: Five things to avoid
Explain five things that you should avoid if you are to improve the performance of the database. 

Task 4: 300 words with 2-3 references

Topic 2: Performance problems
Why is it important for DBAs to be part of the application team?

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