Lol I tried during my instrument training to get a working adf airplane. Never succeeded so.... hope it doesn’t come up.
The FAA has pretty much retired the NDB approach. There are still several out there waiting for decomissioning or conversion but you wont be asked on a checkride or written about NDBs. NDBs are still good to know though if you have any plans to fly internationally as they are the "norm" in many places outside the US.
As to the checkride itself, I did mine about a week ago and it was probably the 2nd easiest checkride I've ever done. About 1.5 oral and 1.5 airwork. (Easiest was my CPL SES add-on)
The oral was big on the FAA emphasis areas and legal regulations around IFR (0-0 takeoffs, legality of approaches with conditions below minimums and requirements for alternates) along with a few other questions about weather (icing and response, turbulence and response, flight near convective fronts and what to do if you find yourself in convective clouds/storm, etc)
Flight portion was pretty straight forward. We created our own departure procedure to the local VOR (which was also the missed approach procedure for the runway we took off from) did a 2 turns in hold, then flew off to do steep turns under the hood, unusual attitudes and stalls. Then we did an ILS to missed (modified missed procedure) followed by the same ILS to missed flown by the DPE (again with a modified missed procedure) during which I had to instruct and correct the DPE's flying. My DPE flew it pretty spot on and I "left" teach mode so to speak when on the missed he assigned an altitude to maintain, took control to allow me to pull up the next chart (we were already inside the IAF for the next approach) so he caught me a bit out as he climbed above our "assigned" altitude while I was looking away. It was even more confusing because the minimum altitude for the approach where we were at that moment was above the "assigned" altitude so my initial thought was he was climbing to the approach altitude; didnt realize he was playing the student and deviating from the assigned altitude and he wanted me to catch it until after he started asking me about it. We talked about it a bit and he understood my confusion and why I didn't catch it right away as it took me a minute to brief the approach and figure out where we were on the approach but reminded me to be ever vigilant with a student. I then took control back, completed the approach which was a VOR partial panel, landed and that was the end of my checkride.
All told the checkride including paperwork, breaks and pre/post-flight was about 4 to 4.5 hours.