Cook the pasta by bringing a large pot of salted water to a boil. Add rotini pasta and cook according to package instructions until al dente. Drain and rinse under cold water.

In a mixing bowl, combine the cooled pasta, corn, cherry tomatoes, and red onion. Add feta cheese and cilantro, tossing gently to mix.

In a separate bowl, whisk together mayonnaise, sour cream, lime juice, chili powder, garlic powder, salt, and pepper until smooth.

Pour the dressing over the pasta mixture, tossing gently until well coated with the dressing.

Cover the salad and refrigerate for at least 30 minutes to allow flavors to meld.

Before serving, give the salad a gentle stir and adjust seasoning as needed. Serve chilled or at room temperature.