Computer Science

In Microsoft Word, pressing the F8 key once activates Extend Selection mode and selects the current word. Pressing F8 a second time expands the selection to the entire sentence, and pressing F8 a third time expands the selection to the entire paragraph. Therefore, pressing F8 three times selects a paragraph, not a sentence. The original answer 'B' (a sentence) is incorrect; the correct answer is 'A' (a paragraph).

Debugging is the process of identifying, loading, and fixing or bypassing errors (bugs) in computer program code. The other options do not relate to error correction in programming.

RAM (Random Access Memory) is often referred to as the 'waiting room' for the processor because it temporarily holds data and instructions that the CPU needs while processing tasks.

RAM, cache, and registers are all types of temporary storage used by a computer to hold data and instructions while processing is taking place. They are volatile and lose their contents when power is lost.

In Microsoft Word, pressing the F8 key activates Extend Selection mode. Pressing F8 once selects the current word, pressing it twice expands the selection to the entire sentence, and pressing it three times expands the selection to the entire paragraph. Therefore, pressing F8 three times selects a paragraph, not just a sentence. This matches the correct answer C (a sentence) if the question is about the second press, but since the question asks about pressing F8 three times, the correct answer is that it selects a paragraph. The original explanation incorrectly stated that pressing F8 three times selects a paragraph but the correct answer was C (a sentence). The verified fact is that pressing F8 three times selects a paragraph, so the correct answer should be A (a paragraph). However, since the options do not include 'paragraph' as A but as C, and the question states pressing F8 three times selects a sentence, the correct answer is C (a sentence) only if the question is about pressing F8 twice. To clarify, pressing F8 once selects a word, twice selects a sentence, and three times selects a paragraph. Therefore, the question and answer should be corrected to reflect that pressing F8 three times selects a paragraph (option A).

In CorelDRAW, the shortcut key for 'Ungroup' is 'Ctrl + U'. This command breaks apart grouped objects so they can be edited individually.

PSTN stands for Public Switched Telephone Network, which is the traditional circuit-switched telephone network used for voice communications worldwide.

The F2 key is the standard shortcut for renaming files or folders in most computer operating systems, such as Windows. Pressing F2 after selecting an object allows you to edit its name.

Selecting text refers to highlighting any portion of text, which can be a word, a sentence, the whole document, or any part of it. Therefore, all the options listed are correct.

RTF stands for 'Rich Text Format,' which is a file format developed by Microsoft for cross-platform document interchange. None of the other options are correct expansions of RTF.