Yes, you must.
Edit: Although the above answer is potentially correct - in the UK you don't HAVE to carry your licence with you when driving BUT you MUST produce it on request - at a police station of your choosing.
In every state, you must pass a driving test to get a drivers license.
No. There is no law that states you must "carry your papers". You must carry a drivers license only when you are operating a motor vehicle.
You must have your license with you to prove you are a licensed driver. Without it, you are not legally allowed to drive.
Unfortunately, you need to take a driving test in order to get a license. you must demonstrate your practical ability to control the vehicle in order to get your license.
As far as I can determine, there is no "international driving permit" that is independent of your drivers license. There are several "international driving permit" forms available from Automobile Associations and such, but these are basically translations of the information shown on your domestic drivers license into several different languages. They must be used in conjunction with your home drivers license; they have no validity on their own.
(in the US) You cannot "exchange" a foreign drivers license for a US state-issued drivers license. You must take all the tests, (written and driving) to prove that you are capable of operating a vehicle according to that state's laws.
yesAdded: But if you reside in Texas, you MUST apply for a Texas license, you cannot continue driving on your old state's license.
A commercial drivers license (cdl) is very different from a regular driving license. In order to obtain a cld you must pass rigorous testing including inspection and knowledge of a commercial vehicle.
No. To get a motorcycle endorsement on your drivers license you must appear in person and demonstrate proficiency in operating it.
you must take a manual driving test and then you will be able to submit your licence to the DVLA to have the new category added.
With or without a drivers license you must carry with you a valid certificate to prove that you have been trained and tested to legally operate a fork/lift truck for commercial use.
You must carry a driver`s license in all states in the US when you are driving.