CompTIA SK0-005 Online Practice Questions and Exam Preparation

CompTIA SK0-005 Online Questions & Answers

• Question 381:

  An administrator needs to perform bare-metal maintenance on a server in a remote datacenter. Which of the following should the administrator use to access the server's console?

  A. IP KVM
  B. VNC
  C. A crash cart
  D. RDP
  E. SSH
  A. IP KVM

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  Explanation

  The administrator should use an IP KVM to access the server's console remotely for bare-metal maintenance. An IP KVM stands for Internet Protocol Keyboard Video Mouse, which is a device that allows remote control of a server's keyboard, video, and mouse over a network connection, such as LAN or Internet. An IP KVM enables an administrator to perform tasks such as BIOS configuration, boot sequence selection, operating system installation, etc., without being physically present at the server location. The other options are not suitable for bare-metal maintenance because they require either physical access to the server (a crash cart) or an operating system running on the server (VNC, RDP, SSH). A crash cart is a mobile unit that contains a monitor, keyboard, mouse, and cables that can be plugged into a server for direct access to its console. VNC stands for Virtual Network Computing, which is a software that allows remote desktop sharing and control over a network connection using a graphical user interface (GUI). RDP stands for Remote Desktop Protocol, which is a protocol that allows remote desktop access and control over a network connection using a GUI or command-line interface (CLI). SSH stands for Secure Shell, which is a protocol that allows secure remote login and command execution over a network connection using a CLI.

• Question 382:

  A data center technician is assigned the daily task of walking through the data center to perform a health check on all the systems. Which of the following issues can the technician detect without logging on to any of the systems? (Choose two.)

  A. VLAN mismatch
  B. UPS battery fault
  C. Overheating
  D. Memory exhaustion
  E. IP conflict
  F. OS failure
  B. UPS battery fault
  C. Overheating

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  Explanation

• Question 383:

  A certain application initially uses 1TB of drive space, but this is expected to double each year for the next two years.

  Which of the following is the minimum number of 1TB drives that are needed in a RAID 5 configuration?

  A. 3
  B. 4
  C. 5
  D. 6
  C. 5

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  Explanation

  RAID 5 is a storage configuration that uses striping with parity, providing both improved performance and fault tolerance. It requires a minimum of three disks, where data and parity information are distributed across all drives. The storage capacity of a RAID 5 array is calculated as (N - 1) * S, where N is the number of drives, and S is the size of each drive. Storage Requirements: Initial Storage: 1TB After 1 Year: Doubles to 2TB After 2 Years: Doubles again to 4TB To accommodate 4TB of data in a RAID 5 setup, we use the formula: (N - 1) * 1TB 4TB Solving for N: N - 1 4 N 5 Therefore, a minimum of 5 drives, each 1TB in size, is required to meet the projected storage needs. This configuration will provide a total usable capacity of 4TB, with 1TB allocated for parity to ensure fault tolerance.

  References: CompTIA Server+ Certification Exam Objectives (SK0-005): RAID Levels and Types CompTIA Server+ (SK0-005) Study Guide: Chapter on Storage Solutions

• Question 384:

  A technician receives reports that a file server is performing slower than usual after a power failure. While investigating the issue, the technician discovers the write cache was disabled. The technician checks a server configuration document and confirms the cache was previously enabled.

  Which of the following events most likely caused this change?

  A. The cache hit rate was high
  B. The volume reached 100% capacity
  C. The RAID controller battery failed
  D. A drive in the array was replaced
  C. The RAID controller battery failed

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  Explanation

  Write caching improves disk performance by temporarily storing write operations in faster cache memory before writing to disk. However, to prevent data loss during power failures, write caching relies on a battery-backed cache. If the RAID controller's battery fails, the system may automatically disable write caching to protect data integrity, leading to reduced performance.

• Question 385:

  A new application server has been configured in the cloud to provide access to all clients within the network. On-site users are able to access all resources, but remote users are reporting issues connecting to the new application. The server administrator verifies that all users are configured with the appropriate group memberships. Which of the following is MOST likely causing the issue?

  A. Telnet connections are disabled on the server.
  B. Role-based access control is misconfigured.
  C. There are misconfigured firewall rules.
  D. Group policies have not been applied.
  C. There are misconfigured firewall rules.

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  Explanation

  This is the most likely cause of the issue because firewall rules can block or allow traffic based on source, destination, port, protocol, or other criteria. If the firewall rules are not configured properly, they can prevent remote users from accessing the cloud application server, while allowing on-site users to access it.

  References: https://docs.microsoft.com/en-us/azure/virtual-network/security-overview

• Question 386:

  Which of the following commands should a systems administrator use to create a batch script to map multiple shares?

  A. nbtstat
  B. net use
  C. tracert
  D. netstat
  B. net use

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  Explanation

  The net use command is a Windows command that can be used to create a batch script to map multiple shares. The net use command can connect or disconnect a computer from a shared resource, such as a network drive or a printer, or

  display information about computer connections. The syntax of the net use command is:

  net use [devicename | *] [\\computername\sharename[\u0003volume] [password | *]] [/user:[domainname\]username] [/user:[dotted domain name\]username] [/user:[[username@dotted domain name] [/savecred] [/smartcard] [{/delete | /

  persistent:{yes | no}}]

  where:

  devicename = the drive letter or printer port to assign to the shared resource computername = the name of the computer that provides access to the shared resource sharename = the name of the shared resource password = the password

  needed to access the shared resource /user = specifies a different username to make the connection /savecred = stores the provided credentials for future use /smartcard = uses a smart card for authentication /delete = cancels a network

  connection and removes the connection from the list of persistent connections /persistent = controls whether the connection is restored at logon To create a batch script to map multiple shares, you can use the net use command with different

  drive letters and share names, for example:

  net use W: \\computer1\share1 net use X: \\computer2\share2 net use Y: \\computer3\share3

  You can also add other options, such as passwords, usernames, or persistence, as needed. To save the batch script, you can use Notepad or any text editor and save the file with a .bat extension12.

  References:

  https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/net-use

  https://www.watchingthenet.com/create-a-batch-file-to-map-drives-folders.html

• Question 387:

  An administrator is configuring a host-based firewall tor a server. The server needs to allow SSH, FTP, and LDAP traffic. Which of the following ports must be configured so this traffic will be allowed? (Choose three)

  A. 21
  B. 22
  C. 53
  D. 67
  E. 69
  F. 110
  G. 123
  H. 389
  A. 21
  B. 22
  H. 389

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  Explanation

  These are the port numbers that must be configured on a host-based firewall for a server that needs to allow SSH, FTP, and LDAP traffic. A port number is a numerical identifier that specifies a communication endpoint for a network protocol

  or an application. A host-based firewall is a software tool that monitors and controls incoming and outgoing network traffic on a single host based on predefined rules. SSH (Secure Shell) is a protocol that allows secure remote access and file

  transfer over an encrypted connection. The default port number for SSH is 22. FTP (File Transfer Protocol) is a protocol that allows transferring files between hosts over a network connection. The default port number for FTP is 21. LDAP

  (Lightweight Directory Access Protocol) is a protocol that allows accessing and managing directory services over a network connection. The default port number for LDAP is 389.

  References:

  https://www.howtogeek.com/190014/virtualization-basics-understanding-techniques-and-fundamentals/

  https://www.howtogeek.com/220152/what-is-the-difference-between-127.0.0.1-and-0.0.0.0/

  https://www.howtogeek.com/428483/what-is-end-to-end-encryption-and-why-does-it-matter/

• Question 388:

  Which of the following BEST describes the metric that is used to measure server downtime?

  A. MTTR
  B. BIA
  C. RPO
  D. SLA
  A. MTTR

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  Explanation

• Question 389:

  A server has experienced several component failures. To minimize downtime, the server administrator wants to replace the components while the server is running. Which of the following can MOST likely be swapped out while the server is still running? (Select TWO).

  A. The power supply
  B. The CPU
  C. The hard drive
  D. The GPU
  E. The cache
  F. The RAM
  A. The power supply
  C. The hard drive

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  Explanation

  The power supply and the hard drive are two components that can most likely be swapped out while the server is still running, if they support hot swapping or hot plugging. Hot swapping or hot plugging means that the device can be added or

  removed without shutting down the system. The operating system automatically recognizes the changes that have been made. This feature is useful for minimizing downtime and improving availability. The CPU, the GPU, the cache, and the

  RAM are not hot swappable and require the system to be powered off before replacing them.

  References:

  https://www.geeksforgeeks.org/what-is-hot-swapping/

  https://www.howtogeek.com/268249/what-is-hot-swapping-and-what-devices-support-it/

• Question 390:

  Users have noticed a server is performing below Baseline expectations. While diagnosing me server, an administrator discovers disk drive performance has degraded. The administrator checks the diagnostics on the RAID controller and sees the battery on me controller has gone bad.

  Which of the following is causing the poor performance on the RAID array?

  A. The controller has disabled the write cache.
  B. The controller cannot use all the available channels.
  C. The drive array is corrupt.
  D. The controller has lost its configuration.
  A. The controller has disabled the write cache.

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  Explanation

  The write cache is a feature of some RAID controllers that allows them to temporarily store data in a fast memory buffer before writing it to the disk drives. This improves the performance and efficiency of write operations, especially for random and small writes. However, if the battery on the controller goes bad, the controller may disable the write cache to prevent data loss in case of a power failure. This can degrade the disk drive performance significantly, as every write operation will have to wait for the disk drives to complete.

  References: https://www.dell.com/support/kbdoc/en-us/000131486/understanding-raid-controller-battery-learn-cycle https://www.techrepublic.com/article/understanding-raid-controller-write-cache/