Nov 12 (Reuters) - U.S. stock indexes opened higher on Friday, as Johnson & Johnson and big technology stocks led gains at the end of a week scarred by deepening concerns over prolonged inflation. The Dow Jones Industrial Average (.DJI) rose 42.55 points, or 0.12%, at the open to 35,963.78. The S&P 500 (.SPX) opened higher by 5.97 points, or 0.13%, at 4,655.24, while the Nasdaq Composite (.IXIC) gained 48.34 points, or 0.31%, to 15,752.62 at the opening bell. Reporting by Devik Jain in Bengaluru; Editing by Aditya Soni