To create a RAID 5 configuration, a minimum of three drives is required.

In RAID 5, data is striped across multiple drives with parity information distributed among the drives. This provides fault tolerance, as the parity information allows for the reconstruction of data in case of a drive failure. Each drive in the RAID 5 array stores both data and parity information.

To ensure redundancy and fault tolerance, RAID 5 requires at least three drives. This way, if one drive fails, the data can still be reconstructed using the parity information on the remaining drives.

Therefore, the correct answer is B) 3.

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To answer this question, let's break down the statement and go through each option:

The statement is: "Though in NAS, we have file level data access, file blocks can be accessed by application."

Option A) True - This option is incorrect because in Network Attached Storage (NAS), file blocks cannot be accessed directly by applications. NAS provides file-level access, which means that applications can access files as a whole, but they do not have direct access to individual file blocks.

Option B) False - This option is correct because it accurately states that file blocks cannot be accessed by applications in NAS. Applications can only access files at the file level, not at the block level.

The correct answer is B) False.

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To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) Serial port - This option is correct. A serial port is a type of computer port that allows data to be transferred one bit at a time. It is commonly used for connecting peripherals such as modems, mice, and older printers.

Option B) Parallel port - This option is correct. A parallel port is a type of computer port that allows data to be transferred in parallel, meaning multiple bits are sent simultaneously. It is commonly used for connecting older printers and some external storage devices.

Option C) USB port - This option is correct. A USB (Universal Serial Bus) port is a commonly used computer port that allows for the connection of various peripherals, such as keyboards, mice, printers, external storage devices, and more. USB ports are widely used due to their versatility and ability to transfer data at high speeds.

Option D) Ethernet port - This option is correct. An Ethernet port is a computer port that is used to connect a computer or other devices to a local network or the internet. It is commonly used for wired internet connections and for connecting devices in a local area network (LAN).

The correct answer is A, B, C, D. These options are correct because they represent different types of computer ports commonly used for various purposes.

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To answer this question, we need to understand the different types of data transfer modes in SCSI (Small Computer System Interface).

Fast SCSI refers to the implementation of the SCSI protocol that allows for higher data transfer rates. One of the key features of Fast SCSI is the use of synchronous data transfer.

Option A) Asynchronous Data Transfer - This option is incorrect because Fast SCSI does not use asynchronous data transfer. Asynchronous data transfer mode allows for variable data transfer rates and is typically used in slower SCSI implementations.

Option B) Synchronous Data Transfer - This option is correct because Fast SCSI uses synchronous data transfer. Synchronous data transfer mode allows for a fixed data transfer rate, which helps to achieve higher transfer speeds in Fast SCSI.

Option C) Semi-synchronous Data Transfer - This option is incorrect because Fast SCSI does not use semi-synchronous data transfer. Semi-synchronous data transfer is not a standard data transfer mode in SCSI.

Option D) None of the Above - This option is incorrect because Fast SCSI does use synchronous data transfer.

The correct answer is B) Synchronous Data Transfer. This option is correct because Fast SCSI uses synchronous data transfer to achieve higher data transfer rates.

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To answer this question, you need to understand the SCSI-1 standard.

SCSI stands for Small Computer System Interface and is a set of standards for connecting and transferring data between computers and peripheral devices. SCSI-1 is the first version of the SCSI standard.

According to the SCSI-1 standard, a maximum of 8 devices can be connected through a SCSI cable. This includes the host adapter (the SCSI controller in the computer) and the peripheral devices (such as hard drives, CD/DVD drives, scanners, etc.).

Therefore, the correct answer is:

Option A) 8 - This option is correct because according to the SCSI-1 standard, a maximum of 8 devices can be connected through a SCSI cable.

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