Assuming you're running Windows, click the start button, and then search for "Device Manager" (or open CMD or PowerShell and type devmgmt.msc). Look at the list of devices. If Bluetooth is there, you have it; if it's not there, you don't. Alternatively, run CPUID CPU-Z to determine the exact model of your motherboard, and then Google the specs.
A.The power of microprocessors will double every two years.
You may be talking about calling via WiFi, that is where you use WiFi to call people. That is normally used in tablets where you can't have a phone provider, so you just use WiFi to call and that saves a lot of money.
Answer:
Interface
Explanation:
Java does not supports multiple inheritance by class, but we can implement multiple inharitacnce in java using interface, with interface we uses implements keyword.
Example-
Declare interface like below code -
interface parent{
}
and use in child class like below code -
class Child1 implements interface{
}
class Child2 implements interface{
}