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General Questions

1.What is virus?

A virus is a program that attaches its code to executable files, so that when the user tries to run the file, they also unintentionally run the virus code. The virus code is designed to infect other programs in a modified form.

The virus makes the file to be run without the user intention. It has the ability to modify other files or disk structures so it can spread to other files or systems.

While many viruses do damages to files and disk structures, many are just nuisances or exhibit strange behavior such as playing music or putting funny phrases on the screen when the system is booted.

2.What is worm?

Worm contains a malicious code or program that is typically find across a network. The worm does not attach its code with executable files as virus does.

3.What are IDE?

IDE refers to “Integrated Drive Electronics”. It is a standard electronic interface between a motherboard's data bus and the computer's disk storage devices. The IDE interface is based on the IBM PC Industry Standard Architecture (ISA). Now enhanced version of IDE comes, called Enhanced Integrated Drive Electronics (EIDE).

IDE is a standard provided by American National Standards Institute (ANSI) in November, 1990. The ANSI name for IDE is Advanced Technology Attachment (ATA).

In the process of IDE, a cache memory has been added to speedup the process of reading and writing hard disk drive data. Overall costs decreased and performance increased.

It is a bus interface and connector for the IDE cable going to the drive. The Integrated Drive Electronics (IDE) is owned by Western Digital and other companies such as Quantum, Maxtor and Seagate use the term ATA. IDE and ATA is the same thing.

4.What are SATA?

Serial ATA refers to “Serial Advanced Technology Attachment”. SATA is a computer bus technology designed for transfer of data to and from hard disk drives. It is successor to the Advanced Technology Attachment standard (ATA), and is expected to replace the older technology. Serial ATA devices communicate over a high-speed serial link.

SATA is a standard for connecting hard drives into computer systems. SATA is based on serial signaling technology while IDE hard drive uses parallel signaling.

SATA has several advantages over the IDE. SATA cables are thinner, flexible and less massive than the ribbon cables that is required for conventional PATA hard drives. SATA cables can be longer than PATA ribbon cables.

5.What are SCSI drives?

SCSI refers to “Small Computer Systems Interface”, which is widely used in media and large systems. SCSI is an industry-standard interface and generally offers faster transfer rates than ATA/IDE does. It is the most commonly used interface in Desktop PC.

ATA/IDE is considered easier to implement and less expensive but does not offer as many features as SCSI. SCSI support connection of many devices over long distances.

6.What are USB Drives?

USB refers to “Universal Serial Bus”. USB is an external bus standard that supports user to connect up to 127 peripheral devices such as mouse, modems, and keyboards etc. USB also supports Plug-and-Play installation and hot plugging.

USB Drives provides a mechanism that allows them to communicate to one or more separate computers.

External hard drives use one of two interfaces including USB or Firewire. USB hard drive uses the USB 2.0 interface because it supports data transfer rates of up to 480 Mbps. The USB hard drives can be efficiently used for audio and video editing. USB hard drives is daisy chained which means they can be connected one after the other and can be used at the same time.

USB drives are treated as a useful tool for backing up main hard drive. USB drives are a good backup solution because they can store an exact copy of another hard drive. The USB drive can be used for restoring data or performing another backup by connecting it to the computer and dragging the files from one drive to another.

7.What is FAT?

FAT refers to File Allocation Table. FAT is a file system used in DOS, Windows and OS/2 operating system. The FAT keeps track of data that has been stored on disk drive.

The directory list that contains file name, extension, time, date and so on points to the FAT entry where the file starts. If a file is larger than one cluster, the first FAT entry point to the next FAT entry where the second cluster of the file is stored to the end of the file. If a cluster becomes damaged, its FAT entry is marked as damaged and that cluster can not be used again.

The original FAT16 is the 16-bit version of the FAT that supports hard disk partitions as small as a floppy disk. FAT32 is the 32-bit version of FAT with increased capacity limits.

8.What is NTFS?

NTFS refers to “New Technology File System”. NTFS is a file system for Windows 2000, NT and XP operating systems. NTFS is the advanced file system as compared to FAT32 file system. It is required to implement numerous security and administrative features in the OS.

NTFS is designed to log activity and recover from hard disk crashes. It also supports the Unicode character set. It improves system performance and allows file names up to 255 characters.

9.What is SIM Card Reader?

SIM card reader is a USB plug-in card reader to manage mobile phone's SIM cards including UMTS USIM cards for 3G mobile phone communications.

SIM card reader can be used to edit SIM phonebook data and take timely backups in case of mobile phone upgrade.

SIM reader works with any SIM (Subscriber Identity Module) in GSM, RUIM (Removable User Identity Module) in CDMA, Nextel SIM card in Nextel and UICC (Universal Integrated Circuit Card) in UMTS regardless of network.

To recover SIM card data using Data Doctor’s SIM Card reader, the user can use both PC/SC Standards and Phoenix Standards based SIM card reader.

Dekart is a PC/SC compliant USB SIM Card reader that can be used for PC security applications and is compatible with all types of smart cards. Dekart SIM card reader is highly suitable for portable applications because it can be plugged into the USB port and does not require any additional cable or wiring.

Features of SIM Card Reader:

  • Provide support to search, add, edit and delete phone numbers in the SIM card.
  • Treated as Back up tool for several SIM cards to one location.
  • Used to manage SIM card PIN codes.
  • No need of battery or additional cables.
  • Full-featured to use for PC security applications.

10.What type of file formats can be recovered using data recovery software?

File formats describes the type of files. Every file on which the user works or saves requires some file format or file extension to save at the specified location.

Large lists of file format are available that can be recovered using Data Doctor’s data recovery software including:

  • AIFF-Audio Interchange File Format
  • AVI-Audio Video Interleave
  • BMP-Bitmap
  • DLL-Dynamic Link Library
  • EXE-Executable Files
  • GIF-Graphical Interchange Format
  • HTML-Hyper Text Markup Language
  • JPEG-Joint Photographic Expert Group
  • MPEG-Moving Picture Expert Group
  • MIDI-Musical Instrument Digital Interface
  • MP3-Media Player 3
  • PDF-Portable Document Format
  • PNG-Portable Network Graphic
  • RTF-Rich Text Format
  • TIFF-Tagged Image File Format
  • TMP-Temporary Files
  • WMA-Window Media Audio
  • WMV-Window Media Video
  • XML-Extended Markup Language
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