Computer Science

A disk (such as a hard disk or floppy disk) is a secondary memory device used for non-volatile, long-term data storage. The keyboard is an input device, and ALU (Arithmetic Logic Unit) is a component of the CPU, neither of which is a secondary memory device.

A mouse is a point-and-draw input device used to control the cursor and interact with graphical elements on a computer screen. It allows users to point, click, and draw or select items. Other options like scanner, printer, and CD-ROM serve different input/output or storage functions.

The word 'computer' is derived from the Latin word 'putare', which means 'to reckon' or 'to calculate'. This reflects the original purpose of computers as calculating devices. Other options are not correct Latin roots related to the term.

In MS Word, font positioning options include Normal, Raised (superscript), and Lowered (subscript). 'Centered' is not a font position option; it is an alignment setting used for paragraph formatting, not character formatting.

Floppy disk is the slowest among the given storage devices because it has very low data transfer rate and higher access time compared to hard disks and zip disks. Hard disks and zip disks are faster and more advanced magnetic storage devices.

The Arithmetic & Logic Unit (ALU) is a core component of the CPU responsible for performing arithmetic and logical operations. Printer, keyboard, and mouse are peripheral input/output devices and are not part of the CPU.

In MS Office applications, text inside a text box can be formatted just like normal text, including font style, size, color, and alignment. Therefore, the statement claiming that text in a text box cannot be formatted is false.

In Windows Help and Support (accessible through Control Panel/Start menu in older versions), common tabs include Contents, Index, and Search. The 'Web' tab is not part of this interface, making it the correct answer.

Speech recognition software allows users to control a computer and input text using their voice instead of hands. It converts spoken words into written text or commands, making it highly useful for users with physical disabilities affecting hand movement.

The Paste Special command in applications like MS Excel allows users to selectively paste specific elements such as values, formulas, formats, and validation rules. Therefore, all the given options can be selectively pasted using this feature depending on the requirement.