Basic Computer: File System & Extensions MCQ - Practice Questions with Answers

Both statements are true. In Windows, the visible extension is part of how a file is identified, such as .docx for Word or .xlsx for Excel. If a user changes only the extension, the file's internal content does not become a new type, but Windows or an application may try to open it with the wrong associated programme. That is why the file may not open correctly. The reason gives the mechanism behind the assertion, so option A is correct.

In Windows, pressing Delete on a file stored on a local drive normally sends it to the Recycle Bin instead of removing it immediately. This is why a user can open the Recycle Bin and restore the file if it was deleted by mistake. The reason gives the purpose of this temporary storage area, so it explains the assertion. Some special cases, such as permanent deletion, behave differently, but the statement says usually, which makes option A correct.

The incorrect statement is that a file name must always show its extension to be usable. Windows can hide known file extensions in the display, yet the file can still open normally because the system still stores and uses the extension or file association internally. The other statements describe basic file-system behaviour: folders hold files and subfolders, extensions commonly come after a dot, and folders organise related files. Hence option B is the only incorrect statement.

The correct matching depends on recognising standard file extensions. .xlsx is the modern Excel workbook format, so I matches 3. .pptx is a PowerPoint presentation, so II matches 4. .txt stores plain text without rich formatting, so III matches 1. .jpg is a common image format, so IV matches 2. Option A gives exactly this sequence: I-3, II-4, III-1 and IV-2. The other options swap familiar Office and image extensions.

The incorrect statement is that changing an extension always converts the file content. An extension is part of the file name and mainly signals the file type to the system and user. If photo.jpg is renamed to photo.pdf, the image data does not automatically become a proper PDF document. Actual conversion needs suitable software or an export/save-as operation. The other statements describe standard file-system behaviour: extensions follow the dot, names must be unique within a folder, and extensions help application association.