Explanation

Shortwave radio operates in the high frequency (HF) band, typically between 3 MHz and 30 MHz.

The range 5.9 MHz to 26.1 MHz is commonly used for long-distance communication like international broadcasting.

Explanation

Fiber optics uses light to transmit data at high speeds through thin glass or plastic fibers.

It is mainly used in communication networks like internet, telephone, and cable TV.

Explanation

MICR is a technology used by banks to read information printed on cheques using magnetic ink.

It allows for fast and secure processing of cheques and reduces the chances of errors or fraud.

Explanation

HTTP is a protocol for fetching resources such as HTML documents.

It provides secure communication over a computer network.

 It can also be used to fetch parts of documents to update Web pages on demand.

https://www.google.com is called the URL

Explanation

The motherboard is the central printed circuit board in a computer that serves as the foundation for all other hardware components.

All other devices, including the CPU, RAM, hard drives, and peripherals, connect directly or indirectly to the motherboard. 

Explanation

A Trap door (or backdoor) is a hidden entry point into a system that bypasses normal authentication, making it a serious security threat.

Unlike viruses or worms, it allows unauthorized access without detection, potentially exposing entire systems.

Explanation

Sabotage refers to the intentional destruction or damage of data or systems.

It involves deliberate harmful actions, unlike accidental data loss or hardware failures.

Explanation

Transmission media refers to the physical path (like cables or wireless signals) used to transfer data between devices.

It enables communication in computer networks, such as LANs and the Internet.

Explanation

Java applets are small programs written in Java that run inside a web browser.

They are used for interactive features in web applications (though now largely outdated).

Explanation

A variable is a named memory location whose value can change during the execution of a program.

In contrast, a constant has a fixed value that does not change while the program runs.