Java Virtual Machine (JVM) Performance Analysis Quiz

What is the first step in identifying CPU usage issues in a Java application running on the JVM?

• Analyzing memory usage

• Using Java profiling tools

• Checking network latency

• Using syscall analysis

What does 'on-CPU' state refer to in JVM performance analysis?

• Time spent in network operations

• Time spent in garbage collection

• Time spent executing instructions on the CPU

• Time spent waiting for I/O operations

Which tool is used for syscall tracing on Linux systems?

• JProfiler

• YourKit

• VisualVM

• strace

What is a significant limitation of using tools like 'strace' for syscall analysis?

• They introduce performance overhead

• They cannot trace network-related syscalls

• They are not compatible with Java applications

• They do not provide detailed reports

How can the impact of syscall tracing overhead be mitigated in production environments?

• By using buffering techniques and tools like eBPF

• By increasing the frequency of context switching

• By using more detailed logging

• By disabling syscall tracing

What is the advantage of using eBPF for syscall analysis?

• It requires changes to kernel source code

• It allows for high-performance tracing with minimal overhead

• It only works on Solaris-based systems

• It cannot filter syscall data

In the context of syscall analysis, what does 'buffered tracing' refer to?

• Tracing syscalls without any filtering

• Using breakpoints to capture data

• Collecting and aggregating data in-memory

• Pausing execution at specific points

Which tool allows for complex filtering and aggregation directly in the kernel?

• VisualVM

• DTrace

• YourKit

• JProfiler

What is the purpose of syscall latency measurement?

• To analyze garbage collection performance

• To measure network bandwidth usage

• To identify memory leaks in the application

• To determine the time taken for each syscall to execute

How can aggregated syscall data improve application performance?

• By identifying frequent and costly syscalls

• By improving the application's user interface

• By increasing the number of syscalls

• By reducing the application's memory usage