Disha Computer Awareness Pdf Jun 2026

Basic architecture and components (Input, Output, and Central Processing Unit) Chapter 2: Computer Hardware

| Device | Type | Description | |--------|------|-------------| | Keyboard | Alphanumeric | QWERTY layout; modifier keys (Ctrl, Alt, Shift) | | Mouse | Pointing | Mechanical/optical; left/right click, scroll wheel | | Scanner | Optical | Converts printed text/images to digital (OCR) | | MICR | Magnetic | Reads magnetic ink (cheque processing) | | OMR | Optical | Detects pencil marks (answer sheets) | | Barcode Reader | Laser | Reads barcode (retail) | | Biometric | Fingerprint/iris | Security authentication | | Joystick | Gaming | Analog input | | Light Pen | Direct drawing | Old CAD systems | disha computer awareness pdf

The Disha Computer Awareness PDF guide offers the following features: Basic architecture and components (Input