What is the standard IRQ assignment for COM2?

What is the standard IRQ assignment for COM2?

• IRQ 0
• IRQ 7
• IRQ 4
• IRQ 3

EXPLANATION

An IRQ (Interrupt ReQuest) is a physical connection on the motherboard through which a piece of hardware communicates with the CPU and the OS; the CPU responds through an I/O (input/output) memory address. The so-called Standard IRQ assignments date back to the early days of DOS and Windows 3.x.
In the bad old days, IRQs had to be assigned manually, either by means of physical switches, jumpers, or with software. Even now, you may occasionally have to assign an IRQ manually, although it doesn't happen often. Also, newer computers have more than 16 IRQs and the hardware and software can share IRQs without fighting. Usually.
IRQ Assignment
0 system timer*
1 keyboard*
2 link to second IRQ controller*
3 serial port 2 (COM2; usually the modem, if present)
4 serial port 1 (COM1; usually the [serial] mouse, if present)
5 available, OR sound card (if present), OR parallel port 2 (LPT2)
6 floppy disk controller*
7 parallel port 1 (LPT1) = the printer
8 real-time clock*
9 available (may appear as IRQ 2)
10 available
11 available
12 available, OR PS/2 mouse (if present)
13 math coprocessor*
14 primary IDE controller (first/main hard drive)*

15 available, OR secondary IDE controller (other hard drives/CDROM, etc.)

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You have a server that uses SCSI hard disks, and all of the hard disks show up in the controller BIOS. You are told to install an OS on the server, but it does not recognize the hard drive(s). What is the most likely cause?

You have a server that uses SCSI hard disks, and all of the hard disks show up in the controller BIOS. You are told to install an OS on the server, but it does not recognize the hard drive(s). What is the most likely cause?

• Hard drives contain bad sectors
• Hard drives are not connected
• SCSI controller driver missing from disk
• OS is wrong for your CPU architecture

EXPLANATION

Install the RAID driver using the F6 installation method

To install the Intel® Rapid Storage Technology (Intel® RST) driver during operating system setup, follow these steps:

1. Press F6 when prompted by the message: Press F6 if you need to install a third party SCSI or RAID driver.
   The message displays during text-mode phase at the beginning of Windows XP* setup.
    

   Note	Nothing happens right after pressing F6. Setup is still loading drivers. Watch for the prompt to load support for mass storage devices.

   
    
2. Press S to Specify Additional Device.
3. Insert the F6 driver disk when prompted by the message: Please insert the disk labeled Manufacturer-supplied hardware support disk into Drive A:
   The disk includes the following files: IAAHCI.INF, IAAHCI.CAT, IASTOR.INF, IASTOR.CAT, IASTOR.SYS, and TXTSETUP.OEM.
    

   Note	Use the Updated: name change to Intel® Rapid Storage Technology F6 Driver Disks download to create a disk with the required files. If you don't have a floppy drive on your system, use a USB floppy drive or create a slipstream version of the operating system.

   
    
4. Press Enter.
5. Use the up and down arrow keys to select your controller from the list of available controllers.
6. Press Enter to confirm your controller and continue.
   The drivers are now installed. Leave the disk in the drive as Windows setup copies the files from the disk to the Windows installation folders. When the copy process is complete, remove the disk. Windows setup is ready to reboot.
7. Create a partition and file system on the RAID volume in the same way you would on any physical disk.

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What does VPN stand for?

What does VPN stand for?

• Virtual Private Network
• Very Private Network
• Virtual Private Net
• Virtual Protected Network 

EXPLANATION

 Virtual private network

A virtual private network extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. Applications running across a VPN may therefore benefit from the functionality, security, and management of the private network.

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What is the name of the first Computer Network?

What is the name of the first Computer Network?

• SkyNet
• MSN
• World Wide Web
• ARPANET

EXPLANATION

The first-ever computer-to-computer link was established on ARPANET (Advanced Research Projects Agency Network), the precursor to the Internet, on October 29, 1969. Originally funded by ARPA (Advanced Research Projects Agency), now DARPA, within the United States Department of Defense, ARPANET was to be used for projects at universities and research laboratories in the US.

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In Java programming, which of the following should you use when you want to access the same resource from a group of threads?

In Java programming, which of the following should you use when you want to access the same resource from a group of threads?

• Volatile keyword
• Resource interface
• Extending thread class
• Runnable interface

EXPLANATION

There is no difference. It all depends on the need and requirements. Let me explain this to you with an example.
Java doesn’t support multiple inheritance, which means you can only extend (inherit) one class so once you extend the Thread class you cannot extend or inherit another class in Java. As per object oriented programing(OOPs), the
whole purpose of inheritance is to add new functionality, modifying or improving behaviors by overriding methods of parent class. If we are not making any modification on Thread then using Runnable interface should be your choice instead of extending Thread class. There are few more things to discuss regarding this. I will cover them in detail in a separate post. I hope this makes sense now.

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