NIELIT CCC: Operating System

Operating System tests your ability to work with a computer’s control software: the desktop, files and folders, settings, shortcuts and basic troubleshooting. CCC questions usually present a small task-rename a file, change the default printer, find a path-and ask for the correct route or result.

Core rules

• The OS manages hardware, memory, processes, files and users; the kernel is its core.
• A file has a name and an extension; the extension suggests the program that opens it. Folders organise files; a path such as C:\Users\CCC\Documents\report.docx gives drive, folders and filename.
• Copy leaves the original and creates another; move removes the original location. Delete sends to Recycle Bin; emptying the bin frees space.
• A shortcut is a link, not the file. Deleting a shortcut does not delete the original.
• Common shortcuts: Ctrl+C copy, Ctrl+X cut, Ctrl+V paste, Ctrl+Z undo, Alt+Tab switch windows, Ctrl+Shift+Esc open Task Manager.

Worked example

A file is at D:\CCC\Notes\unit1.txt. You right-click and choose Copy, then open E:\Backup and choose Paste. Result: two copies exist-one at the original path and one at E:\Backup\unit1.txt. If you had chosen Cut instead, the original would be removed after pasting. The extension .txt still indicates a text file, so changing the folder does not change the file type.

Traps

Do not say delete always erases permanently; do not confuse Sleep with Shutdown; do not assume a shortcut contains the file; and remember that renaming an extension does not convert the format. In Windows, file names cannot contain backslash, forward slash, colon, asterisk, question mark, double quote, angle brackets or pipe.