EX342 Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting exam Free Dumps

dumps2025-08-30T10:12:59+08:00

Passing EX342 exam can help you become Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting. EX342 exam is a performance-based evaluation of candidates ability to diagnose and fix or otherwise troubleshoot common problems and issues encountered when working with Red Hat Enterprise Linux. Each candidate has 4 hours to answer all the questions. We povide the latest Red Hat EX342 exam dumps, which can ensure you pass the test easily. Free Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting EX342 exam dumps are available below.

Page 1 of 9

1. You are asked to troubleshoot a hardware-related issue on a RHEL server. As part of the initial diagnosis, you need to collect detailed hardware information including CPU, memory, motherboard, and BIOS version.

What commands will you use and how?

See the Explanation.

2. You are troubleshooting a performance issue and need to collect information about all block devices and their attributes including mount points and sizes.

How can you achieve this?

See the Explanation.

3. You want to identify what kernel version your system is running and compare it against the latest available from Red Hat.

What steps will you follow?

See the Explanation.

4. You suspect that a faulty driver module is causing issues.

How can you list all currently loaded kernel modules and gather more info about a specific one?

See the Explanation.

5. A user reports slow system performance. You are tasked to analyze CPU and memory usage for the last hour.

How can you collect this data?

See the Explanation.

6. You need to gather information about all system services and their statuses to check for failed services.

What is the most efficient method?

See the Explanation.

7. Your team is troubleshooting a startup issue. You're asked to identify failed systemd units during boot.

How do you do this?

See the Explanation.

8. You are asked to collect CPU, memory, I/O, and network usage in real-time for analysis.

What tools and steps will you use?

See the Explanation.

9. A user complains of application crashes.

How do you locate and collect system logs related to the crash for analysis?

See the Explanation.

10. Your task is to identify recent changes made to configuration files across the system.

How can you trace this effectively?

See the Explanation.

Page 2 of 9

11. You are diagnosing frequent I/O errors reported by applications. You need to collect detailed disk error logs and SMART data to assess potential disk failure.

How can you do this on a RHEL server?

See the Explanation.

12. An engineer requests information about all installed packages for system validation.

How can you generate and share a list of all installed RPM packages and their versions?

See the Explanation.

13. You need to identify which process is consuming excessive memory during peak hours.

What commands can help you pinpoint the culprit and collect memory statistics?

See the Explanation.

14. A system has frequent reboots. You are asked to check previous boot events and identify causes for the reboots.

What approach should you take?

See the Explanation.

15. You're assisting in a kernel panic investigation.

How can you gather historical panic messages and kernel crash information for analysis?

See the Explanation.

16. An engineer needs to consult Red Hat's official documentation to check kernel tuning parameters.

How do you locate and verify this information online and offline?

See the Explanation.

17. You are auditing a system and must gather system boot and shutdown times over the past week.

How can you do this efficiently using built-in tools?

See the Explanation.

18. You suspect a recent software update might have introduced a bug.

How can you find all packages updated in the last 7 days and their history?

See the Explanation.

19. During troubleshooting, your team wants a full snapshot of running processes, memory, and open files.

How do you collect this all-in-one snapshot?

See the Explanation.

20. You are preparing a troubleshooting report.

How can you generate a complete summary of the RHEL system’s hardware, software, network, and log data using one built-in tool?

See the Explanation.

Page 3 of 9

21. A system fails to boot into graphical.target and remains in emergency mode. You suspect a service failure is responsible.

How do you identify and fix the failing service?

See the Explanation.

22. After reboot, a custom service doesn’t start. You need to debug and fix the unit file.

How do you approach this?

See the Explanation.

23. A user reports that after enabling a service, the system hangs at boot.

How can you temporarily prevent it from starting to troubleshoot?

See the Explanation.

24. A misconfigured fstab entry causes the system to hang at boot.

How do you regain access and fix it?

See the Explanation.

25. Your system boots into rescue mode due to a corrupted initramfs.

How can you regenerate it and restore boot?

See the Explanation.

26. The system boots into emergency mode due to a missing boot loader configuration.

How do you restore GRUB on BIOS-based systems?

See the Explanation.

27. You lost root access due to a forgotten password.

How can you reset it and regain control?

See the Explanation.

28. A unit file is failing to start with “Unit not found.” How do you verify its installation and fix the systemd unit path?

See the Explanation.

29. Your system fails to boot due to an invalid SELinux context.

How do you repair it to regain normal operation?

See the Explanation.

30. How can you check if a systemd target is causing a boot failure and switch to an alternative target for diagnosis?

See the Explanation.

Page 4 of 9

31. You need to identify services that cause slow boot times.

What built-in tool do you use and how?

See the Explanation.

32. You removed a service but it still attempts to start at boot.

How do you completely clean up the remnants?

See the Explanation.

33. How do you verify if a failed mount unit is causing emergency mode and resolve it?

See the Explanation.

34. A service crashes immediately after boot. You need to identify the root cause.

How do you proceed?

See the Explanation.

35. You need to regenerate the bootloader configuration.

What steps are required for BIOS and UEFI systems?

See the Explanation.

36. The system reports a "kernel panic - not syncing" message.

How do you troubleshoot and recover from this?

See the Explanation.

37. You need to find all services that failed during the previous boot.

What is the correct method?

See the Explanation.

38. A system refuses to boot due to corrupted bootloader entries.

How do you reconfigure GRUB manually?

See the Explanation.

39. You are asked to verify and switch the system’s default boot target.

How do you accomplish this?

See the Explanation.

40. You want to ensure that a critical service always restarts if it fails after boot.

How can you enforce this?

See the Explanation.

Page 5 of 9

41. Your RHEL system fails to boot and displays a GRUB> prompt instead of the boot menu.

How do you restore the bootloader and recover the system?

See the Explanation.

42. During boot, the system drops to the dracut shell with "cannot find root device".

How do you resolve this and restore normal boot?

See the Explanation.

43. The boot process fails with a message about a missing initramfs.

How do you regenerate the initramfs image for the default kernel?

See the Explanation.

44. Your system freezes at the boot splash screen.

How can you diagnose where the boot is getting stuck?

See the Explanation.

45. You receive kernel panic errors during boot, indicating VFS: Unable to mount root fs.

How do you resolve this?

See the Explanation.

46. You suspect a failing hardware disk.

How do you check disk health and gather diagnostics?

See the Explanation.

47. A server fails POST checks with beeping and does not reach the OS loader.

What steps can you take to identify the hardware fault?

See the Explanation.

48. A system boots but fails to detect the NIC card.

How do you check if the hardware is detected and drivers

are loaded?

See the Explanation.

49. You suspect a memory issue is causing boot crashes.

How can you test the system memory?

See the Explanation.

50. A newly added disk is not visible after reboot.

How do you detect hardware connection issues at the block device level?

See the Explanation.

Page 6 of 9

51. How can you permanently blacklist a hardware module that’s causing boot instability?

See the Explanation.

52. You get a warning that the root filesystem is mounted read-only after boot.

How can you resolve this?

See the Explanation.

53. During boot, the screen displays “device not found” errors for encrypted LUKS volumes.

How do you troubleshoot and recover access?

See the Explanation.

54. A BIOS-level time error is causing system time drift and log mismatch.

How do you synchronize system time and configure timekeeping?

See the Explanation.

55. After replacing a motherboard, the NIC name has changed.

How do you rename it back to the original name (e.g., eth0)?

See the Explanation.

56. You replaced a failed disk in a RAID array.

How do you check RAID status and re-add the new disk?

See the Explanation.

57. Your boot is stuck on "Started Show Plymouth Boot Screen".

How do you bypass graphical boot to diagnose further?

See the Explanation.

58. You need to verify the integrity of all RPM packages to detect corruption after a hardware failure.

How do you do this?

See the Explanation.

59. You suspect a failing power supply due to spontaneous shutdowns.

How can you confirm using logs or utilities?

See the Explanation.

60. A system fails to detect PCIe cards after an upgrade.

How do you verify BIOS and OS-level PCIe detection?

See the Explanation.

Page 7 of 9

61. You are asked to load a custom kernel module named mydriver.ko for a hardware device.

How do you load it manually and verify that it's functioning?

See the Explanation.

62. You want a kernel module (loop) to load automatically at boot.

How do you configure this?

See the Explanation.

63. You need to disable the usb-storage module to prevent USB mass storage devices.

How do you block it from loading?

See the Explanation.

64. You want to see all parameters supported by a loaded kernel module e1000e.

How can you list and check their current values?

See the Explanation.

65. You need to change the crashkernel parameter in the GRUB configuration to enable kdump.

How do you do this safely and persistently?

See the Explanation.

66. Your system is crashing due to a known buggy kernel module.

How do you unload it temporarily without rebooting?

See the Explanation.

67. A module requires a parameter (debug=1) to be set at load time.

How do you set this during boot?

See the Explanation.

68. You want to get detailed information about all currently loaded kernel modules for documentation.

What command do you use and how do you format it?

See the Explanation.

69. Your NIC is not functioning because the required module is not autoloaded.

How do you find the matching module and enable it?

See the Explanation.

70. You need to inspect which module is using a particular device file (e.g., /dev/snd/pcmC0D0p).

How can you trace this?

See the Explanation.

Page 8 of 9

71. The system fails to boot and reports a corrupted root file system.

How do you recover it using fsck?

See the Explanation.

72. The /home filesystem is reporting superblock corruption.

How do you find and use an alternate superblock with fsck?

See the Explanation.

73. A non-root file system is showing “bad magic number” errors.

How do you recover from this issue?

See the Explanation.

74. You encounter a failed mount due to journal replay failure.

How do you fix an ext4 journal issue?

See the Explanation.

75. The mount command fails with "structure needs cleaning." How do you resolve this error?

See the Explanation.

76. An LVM volume group fails to activate at boot.

How do you troubleshoot and recover this VG?

See the Explanation.

77. One of the LVM PVs is missing after a disk replacement.

How do you re-integrate or replace it in the VG?

See the Explanation.

78. You accidentally deleted an LVM logical volume.

How can you attempt recovery?

See the Explanation.

79. A logical volume is not mounting due to “unknown filesystem type.” How do you determine the correct type and fix it?

See the Explanation.

80. You need to resize an existing LVM volume and its file system.

How do you safely increase the size?

See the Explanation.

Page 9 of 9

81. You get the error “Volume group not found” during boot.

How do you fix missing VG mapping?

See the Explanation.

EX342 Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting exam Free Dumps

EX342 Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting exam Free Dumps

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