CompTIA CompTIA Certifications FC0-U51 Questions & Answers

• Question 51:

  Which of the following internal busses are used for expansion cards?

  Each correct answer represents a complete solution. Choose all that apply.

  A. PCI

  B. SATA

  C. PCI Express

  D. ISA

  Correct Answer: ACD

  The following internal busses are used for expansion cards:

  PCI Express

  PCI

  ISA

  What is PCI Express (PCIe)?

  PCI Express (PCIe), also known as 3rd Generation I/O (3GIO), is a type of computer bus. It is a new I/O bus technology that has more bandwidth than PCI and AGP slots. It uses two low voltage differential pairs, at 2.5Gb/s in each direction.

  It is designed to replace PCI and AGP expansion slots.

  The bus is available in several different bus widths: x1, x2, x4, x8, x12, x16, and x32. PCIe is able to transfer data in both directions at a time. PCIe hardware will work on operating systems that support PCI.

  What is a PCI bus?

  Peripheral Component Interconnect (PCI) is a high-performance, 32-bit or 64-bit bus designed to be used with devices that have high bandwidth requirements, such as the display subsystem.

  What is an ISA bus?

  Industry Standard Architecture (ISA) is an 8-bit expansion bus that provides an interface from devices on expansion cards to the computer's internal bus. A later version of ISA bus comes with a 16-bit expansion slot.

  Answer option B is incorrect. SATA is used for hard disk drive and CD/DVD drives.

  What is SATA?

  The Serial ATA (SATA) computer bus is a storage-interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives. SATA offers several compelling advantages over the older parallel ATA

  (PATA) interface, such as reduced cable-bulk and cost, faster and more efficient data transfer, full duplex, and hot swapping. It is designed to replace the older ATA (AT Attachment) standard (Parallel ATA). All SATA devices support hot

  plugging and hot swapping. SATA supports Native Command Queuing (NCQ) for enhanced performance.

  Reference: "http://en.wikipedia.org/wiki/Computer_hardware"

• Question 52:

  Rick works as a Network Administrator for Company Inc. He takes a backup of some important compressed files on an NTFS partition, using the Windows 2000 Backup utility. Rick restores these files in a FAT32 partition. He finds that the restored files do not have the compression attribute.

  What is the most likely cause?

  A. The FAT32 partition is corrupt and requires to be reformatted.

  B. A FAT32 partition does not support compression.

  C. The Windows 2000 Backup utility decompresses compressed files while taking a backup.

  D. The backup of files that are saved on an NTFS partition cannot be restored in a FAT32 partition.

  Correct Answer: B

  When a backup taken in an NTFS partition is restored in a FAT32 partition, the following file properties are retaineD.

  Long file names

  File attributes

  Encryption, permission, and compression are lost, as the FAT32 file system does not support these features.

  Answer option D is incorrect. A backup of files that are saved in an NTFS partition can be restored in a FAT32 partition. However, while doing so, only the properties that are exclusively supported by

  NTFS are not retained.

  Answer option A is incorrect. A corrupt partition cannot restore backup files. The question clearly states that the compression attribute is not retained. This indicates that the backup files are successfully restored. Therefore, a corrupt partition

  cannot be the most likely cause.

  Answer option C is incorrect. The Windows 2000 Backup utility can take a backup of compressed files in compressed mode.

• Question 53:

  Your Windows XP hard drive has 2 partitions. The system partition is NTFS and the other is FAT. You wish to encrypt a folder created on the system partition for the purpose of data security.

  Which of the following statements is true about this situation?

  A. Since the operating system is on the NTFS partition, you can encrypt files on both.

  B. You can only encrypt files on the FAT partition.

  C. You can only encrypt files on the NTFS partition.

  D. You cannot encrypt files on either partition.

  Correct Answer: C

  NTFS supports file encryption and you can only encrypt files on an NTFS partition. What is NTFS? Hide NTFS is an advanced file system designed for use specifically in Windows NT, Windows 2000/2003, and Windows XP operating systems. It supports file system recovery, large storage media, long file names, and other features. NTFS offers features such as disk quotas, distributed link tracking, compression, and mounted drives. NTFS also offers security features, such as encryption and file and folder permissions. These features are not available on FAT volumes. Answer option A is incorrect. The that your operating system is on an NTFS partition does not change the that only NTFS partitions support encryption. Answer option B is incorrect. FAT does not support encryption.

• Question 54:

  Which of the following DB-style connectors are used by SCSI-2 drive interface standard? Each correct answer represents a complete solution. Choose three.

  A. 40-pin female

  B. 25-pin female

  C. 68-pin female

  D. 50-pin female

  Correct Answer: BCD

  The following DB-style connectors are used by SCSI-2 drive interface standard: 68-pin female 50-pin female 25-pin female Small Computer System Interface (SCSI) is the second most popular drive interface in use today after the Integrated Drive Electronics (IDE) interface. SCSI is faster than IDE and supports more devices. SCSI devices, such as hard disk drive and CD-ROM drive, are better suited in a network environment in which many users access shared drives simultaneously. SCSI has three standards: SCSI-1, SCSI-2, and SCSI-3. Answer option A is incorrect. There is no such 40-pin female DB-style connector is available. Reference: "http://en.wikipedia.org/wiki/SCSI"

• Question 55:

  You need to select a laptop for a traveling salesman. He will really need to stretch the battery life as long as possible, so he wants low power options wherever possible.

  Which type of monitor should you select?

  A. LCD

  B. CRT

  C. Active Matrix

  D. Passive Matrix

  Correct Answer: D

  Passive matrix LCD monitors use less power than active matrix, and are generally preferred for laptops when long battery life is the key concern. Answer option C is incorrect. An active matrix LCD uses more power than a passive matrix, but

  gives a higher quality picture.

  Answer option B is incorrect. Cathode Ray Tube monitors are legacy monitors that were once used on PC's.

  Answer option A is incorrect. All laptops use LCD monitors. The question is whether or not one should select an active or passive matrix LCD.

  What is Cathode Ray Tube (CRT)? Hide

  Cathode Ray Tube (CRT) is a vacuum tube used as a display screen in a computer monitor or TV. The viewing end of the tube is coated with phosphors, which emit light when struck by electrons. CRT works by heating a cathode which

  causes electrons to flow. Accelerating and focusing anodes turn the electrons into a fine beam that is directed to the phosphors by magnetic fields that are generated by steering coils. The viewing end of a color CRT tube is coated with red,

  green and blue phosphor dots, and separate "electron guns" bombard their respective colors a line at a time in a prescribed sequence. The resulting color displayed on screen is determined by the intensity of the electron beams as they strike

  the red, green and blue phosphors at that same pixel location.

• Question 56:

  Which of the following actions can a technician take to reduce the chances of static charges being built up? Each correct answer represents a complete solution. Choose three.

  A. Wear silken clothes.

  B. Do not wear wrist strap.

  C. Remove carpets from computer rooms.

  D. Wear cotton clothes.

  E. Increase humidity level.

  Correct Answer: CDE

  In order to reduce the chances of static charges being built up, users or technicians will have to take the following steps:

  Wear cotton clothes. This will reduce the chance of building up of static charges. Do not cover the computer room's floor with carpets. This stops neutralizing of static charges.

  Increase humidity level. Humidity helps dissipate static charges.

  What is ESD?

  ESD stands for Electrostatic discharge. The static electricity that we generate everyday creates ESD. If you walk across a carpet and touch someone, you experience a mild shock. Electrostatic discharge occurs when the electrostatic charge

  is transferred from one charged entity to another entity sensitive to that charge. To minimize Electrostatic discharge (ESD) problems, consider wearing a wrist strap when you are working with computer components. A wrist strap is a wire with

  a watchband-style strap at one end and a plug or clip on the other end. The wrist strap plug or clip is connected to the ground or to the piece of equipment being worked on. Answer option A is incorrect. A technician should not wear silken

  clothes during computer servicing, as silken clothes are more likely to generate static charges than cotton clothes. Answer option B is incorrect. Wearing wrist strap will keep a technician grounded. Hence, static charges cannot build up.

  Reference: "http://en.wikipedia.org/wiki/Electrostatic_discharge"

• Question 57:

  Which of the following standard displays is commonly used on 14 inch or 15 inch laptop LCD screens with a resolution of 1400 x 1050 pixels?

  A. SXGA+

  B. UXGA

  C. WUXGA

  D. SXGA

  Correct Answer: A

  SXGA+ stands for Super eXtended Graphics Array Plus and is a computer display standard. An SXGA+ display is commonly used on 14-inch or 15-inch laptop LCD screens with a resolution of 1400 1050 pixels. SXGA+ is also the maximum

  resolution native to many high-end video projectors. An SXGA+ display is used on a few 12 inch laptop screens such as theThinkPad X60 and X61.

  Answer option D is incorrect. SXGA stands for Super eXtended Graphics Array. It is a display standard that refers to video adapters. This standard is an enhancement of the standard XGA resolution developed by IBM. It is capable of

  displaying the resolution of 1280 x 1024 pixels.

  Answer option B is incorrect. UXGA stands for Ultra eXtended Graphics Array. It is a display standard that refers to video adapters. This display standard is capable of displaying the resolution of 1600 x 1200 pixels. A UXGA display provides

  four times more pixels than an 800 x 600 display.

  Answer option C is incorrect. WUXGA stands for Widescreen Ultra eXtended Graphics Array. It is a display standard that refers to video adapters. This display standard is capable of displaying a resolution of 1920 x 1200 pixels with a 16:10

  screen aspect ratio. WUXGA resolution is currently available in high-end LCD televisions and computer monitors. Reference: "http://en.wikipedia.org/wiki/SXGA%2B"

• Question 58:

  Which of the following is a program initially designed to prevent phosphor burn-in on CRT and plasma computer monitors?

  A. Screensaver

  B. Monitor saver

  C. Debugger

  D. Spider

  Correct Answer: A

  A screensaver is a program initially designed to prevent phosphor burn-in on CRT and plasma computer monitors by blanking the screen or filling it with moving images or patterns when the computer is not in use. Modern screensavers are used primarily for entertainment or security. Answer option D is incorrect. A spider is an automated program, such as a search engine, indexing program, or cataloging software. It requests Web pages much faster than human beings can. A spider is also known as crawler and robot. Answer option C is incorrect. A debugger is a special application program that is used to find bugs in other programs. It allows a programmer to stop a program at any point of time and examine and change the values of the variables. It is the program execution platform that allows the following: Pausing the program execution at any time Inspecting the values of the program variables Modifying the values of the program variables Calling the methods of the program randomly The steps in debugging are as follows: 1.Gather data 2.Develop a hypothesis 3.Perform experiments 4.Predict new s 5.Prove or disprove the hypothesis Answer option B is incorrect. There is no program such as Monitor saver. Reference: "http://en.wikipedia.org/wiki/Screensaver"

• Question 59:

  Which of the following firewalls inspects the actual contents of packets?

  A. Packet filtering firewall

  B. Application-level firewall

  C. Circuit-level firewall

  D. Stateful inspection firewall

  Correct Answer: B

  The application level firewall inspects the contents of packets, rather than the source/destination or connection between the two. An Application level firewall operates at the application layer of the OSI model.

  Answer option C is incorrect. The circuit-level firewall regulates traffic based on whether or not a trusted connection has been established. It operates at the session layer of the OSI model.

  Answer option A is incorrect. The packet filtering firewall filters traffic based on the headers. It operates at the network layer of the OSI model. Answer option D is incorrect. The stateful inspection firewall assures the connection between the

  two parties is valid and inspects packets from this connection to assure the packets are not malicious.

  Reference: "http://en.wikipedia.org/wiki/Firewall_(networking)#Third_generation_

  _application_layer"

• Question 60:

  Which of the following display standards has a resolution of 1400 x 1050 pixels?

  A. XGA

  B. UXGA

  C. SXGA+

  D. WUXGA

  Correct Answer: C

  The SXGA+ display standard has a resolution of 1400 x 1050 pixels. It is an enhancement SXGA display standard.

  What is SXGA?

  SXGA stands for Super eXtended Graphics Array. It is a display standard that refers to video adapters. This standard is an enhancement of the standard XGA resolution developed by IBM. It is capable of displaying the resolution of 1280 x

  1024 pixels. Answer option D is incorrect. WUXGA stands for Widescreen Ultra eXtended Graphics Array. It is a display standard that refers to video adapters. This display standard is capable of displaying a resolution of 1920 x 1200 pixels

  with a 16:10 screen aspect ratio. WUXGA resolution is currently available in high-end LCD televisions and computer monitors. Answer option A is incorrect. XGA stands for eXtended Graphics Array. It is a display standard that refers to video

  adapters. IBM introduced this display standard in 1990. It is capable of displaying the resolution of 1024 x 768 pixels. Answer option B is incorrect. UXGA stands for Ultra eXtended Graphics Array. It is a display standard that refers to video

  adapters. This display standard is capable of displaying the resolution of 1600 x 1200 pixels. A UXGA display provides four times more pixels than an 800 x 600 display.

  Reference: "http://www.answers.com/topic/sxga"