Yes, you can cook spaghetti noodles in the microwave!
In a large bowl, add spaghetti noodles, breaking them in half as needed. Add enough boiling water to cover the noodles, plus an additional 2″ higher to allow for the noodles to expand and absorb water. Add small amount of salt and oil. Stir noodles to ensure they are not sticking, then place uncovered in microwave. Heat on high for 10 minutes or until noodles are al dente. Without removing from the microwave, cover top of container with lid or plate and allow to stand for 3-5 minutes to finish cooking. Drain and serve.