Please answer the following short questions as simple as you can: Database structures difference: 1. Structured 2. Semi-structured 3. Non-structured Types of operating systems are as follows: (Difference between them?) 1. Mobile devices 2. Workstation 3. Server OS 4. Embedded OS 5. Typel - Hypervisor Difference between Popup blockers and Script blockers. When certifications are valid and invalid in computer field. Network Interface Controller NIC has two types: Wired Vs. Wireless On-board Vs. Add-on card