Linux Performance Tuning & Optimization

1. What is context switching in the context of CPU performance?

Saving and restoring process state when CPU switches between processes

Changing network interface contexts

Switching between user and kernel mode only

Migrating processes between servers

Submit

3. Which kernel parameter controls how aggressively the system swaps out memory?

Vm.swappiness

Vm.page_cache

Vm.dirty_ratio

Vm.overcommit_memory

Submit

5. What is the purpose of CPU frequency scaling (cpufreq)?

Increase maximum CPU speed

Reduce power consumption by adjusting CPU frequency

Distribute load across cores

Monitor CPU temperature

6. Which tool provides detailed process-level I/O statistics?

Iotop

Blktrace

Pidstat

Tiptop

Submit

8. What does the sar command monitor?

System Activity Report with historical data

Service availability and response

Security access records

Swap allocation records

9. Which of the following indicates the kernel is CPU-bound?

High context switch rate

Low CPU utilization with high load average

High CPU utilization with high run queue depth

Excessive page faults

Submit

11. Which command displays real-time process CPU and memory usage with a dynamic, interactive interface?

Top

Ps

Iostat

Vmstat

Submit

13. Which command traces system calls made by a process?

Ltrace

Strace

Trace

Syscall

14. What does nice priority in Linux range from?

-20 to 20

0 to 100

1 to 40

0 to 255

Submit

16. Which tool reports I/O statistics and device utilization?

Iotop

Iostat

Netstat

Strace

17. What is the purpose of CPU affinity in Linux performance tuning?

Bind processes to specific CPU cores

Increase CPU clock speed

Disable CPU frequency scaling

Reduce power consumption only

Submit

19. Which scheduling algorithm does the Linux kernel use by default?

Round-robin only

Completely Fair Scheduler (CFS)

Priority-based preemption

FIFO scheduling

20. What does the load average represent in Linux?

Percentage of CPU being used

Average number of processes in the run queue

Total memory consumed

Disk I/O throughput

LFCE Linux Performance Tuning Quiz

1. What is context switching in the context of CPU performance?

2.

What first name or nickname would you like us to use?

2. Page ____ occurs when the CPU references memory not currently in physical RAM.

3. Which kernel parameter controls how aggressively the system swaps out memory?

4. The ____ file in /proc shows memory allocation per process.

5. What is the purpose of CPU frequency scaling (cpufreq)?

6. Which tool provides detailed process-level I/O statistics?

7. Virtual memory ____ is the rate at which the system swaps memory pages to disk.

8. What does the sar command monitor?

9. Which of the following indicates the kernel is CPU-bound?

10. The ____ command adjusts process priority after it has started.

11. Which command displays real-time process CPU and memory usage with a dynamic, interactive interface?

12. Memory ____ occurs when the system uses disk space to extend RAM capacity.

13. Which command traces system calls made by a process?

14. What does nice priority in Linux range from?

15. The ____ file system parameter controls the maximum number of file descriptors per process.

16. Which tool reports I/O statistics and device utilization?

17. What is the purpose of CPU affinity in Linux performance tuning?

18. The ____ command shows memory usage broken down by process and can help identify memory leaks.

19. Which scheduling algorithm does the Linux kernel use by default?

20. What does the load average represent in Linux?