Computer Fundamentals and Typing Software Operation
This domain covers the machine and software you type on: basic hardware and operating-system ideas, file handling, shortcuts, and the practical operation of typing-tutor and speed-test software, including font and layout switching.
Core concepts
- Data flow: input (keyboard) → processing (CPU) → output (monitor) → storage (disk). RAM is volatile working memory; ROM holds firmware.
- Files carry extensions that decide the application and the formatting: .docx keeps formatting, .pdf fixes the layout, .txt keeps neither. Devanagari needs a Unicode-aware format.
- Keyboard layout is switched from the language bar (Alt+Shift or Windows+Space on Windows); the selected layout decides which character a physical key produces.
Shortcuts worth memorising
Ctrl+S save, Ctrl+P print, Ctrl+Z undo, Ctrl+Y redo, Ctrl+A select all, Ctrl+C/V/X copy-paste-cut, Ctrl+F find. Backspace deletes left of the cursor, Delete deletes right.
Worked example
A candidate opens the test file and the Devanagari text shows as rows of empty boxes. Reasoning: boxes ("tofu") mean the rendering font is missing or not selected, not that the text is corrupt. Fix: install or select the Unicode Devanagari font specified for the exam (Mangal is standard), and confirm the correct keyboard layout is active before typing a single word. If instead Latin gibberish appears, the text was typed in a legacy Kruti Dev font and is being viewed as Unicode - an encoding mismatch, not a font gap.
Traps that cost marks
- Pressing Ctrl+P when you meant Ctrl+S, and printing a half-finished file.
- Switching layout mid-word and producing mixed-script garbage.
- Saving the final answer as .txt and losing required formatting.
- Leaving Sticky Keys or Filter Keys enabled on an unfamiliar machine.