Computer Knowledge
What this domain tests
Computer Knowledge tests practical awareness of hardware, software, memory, operating systems, MS Office, internet and email, browsers, keyboard shortcuts, and basic cyber safety. Allahabad High Court Group C expects office-level computer literacy, not programming depth. Questions often ask about file extensions, storage units, and common troubleshooting steps.
Core rules and concepts
- RAM is volatile; ROM is non-volatile. Primary memory is directly accessed by the CPU; secondary storage such as a hard disk or pen drive is persistent.
- In Excel, $A$1 is an absolute reference, A1 is relative, and A$1 is mixed.
- Common shortcuts: Ctrl+C copy, Ctrl+X cut, Ctrl+V paste, Ctrl+Z undo, Ctrl+Y redo, Ctrl+S save, Ctrl+P print.
- Email: To is the primary recipient, CC is a visible copy, and BCC is a hidden copy.
- HTTPS adds encryption; HTTP does not. A bit is a binary digit; 8 bits make one byte.
Worked example
Question: In MS Excel, which cell reference remains fixed when copied to another cell? Options: A1, $A$1, A$1, $A1. Reasoning: The dollar sign locks the part that follows it. In $A$1, both the column and the row are locked, so copying does not change the reference. A1 changes both parts; A$1 locks only the row; $A1 locks only the column. Answer: $A$1.
Traps that cost marks
Do not confuse Save with Save As; Save As creates or renames a copy. Do not treat RAM as permanent storage. In email questions, remember that BCC recipients are hidden from other recipients. Do not mix Ctrl+Z with Ctrl+Y, and do not call a byte a bit.