Qualys Interview Questions, Process, and Tips

The challenge in analysis is to identify the root cause of performance issues.

• Identify the performance metrics to be analyzed

• Collect and analyze data from various sources

• Use tools like APM, profiling, and monitoring tools

• Identify patterns and anomalies in the data

• Correlate the data to identify the root cause

• Provide recommendations for improvement

Linux commands for monitoring

• top - displays system processes

• htop - interactive process viewer

• vmstat - virtual memory statistics

• iostat - input/output statistics

• netstat - network statistics

• sar - system activity report

• free - displays memory usage

• df - displays disk space usage

• ps - displays information about running processes

SQL plan can be analyzed using tools like SQL Developer, SQL*Plus, or Oracle Enterprise Manager.

• Use EXPLAIN PLAN to generate a query execution plan

• Analyze the plan for potential performance issues

• Look for full table scans, high cost operations, and missing indexes

• Use SQL tuning tools to optimize the plan

• Consider using hints to force a specific execution plan