What is printed besides the stack trace caused by the NullPointerException from line 16?
❌ A. AE ❌ B. AEBCD ✅ C. AEC ❌ D. AECD ❌ E. No output appears other than the stack trace
Explanation: The main() method invokes go and A is printed on line 3. The stop method is invoked and E is printed on line 14. Line 16 throws a NullPointerException, so stop immediately ends and line 17 doesn’t execute. The exception isn’t caught in go, so the go method ends as well, but not before its finally block executes and C is printed on line 9. Because main() doesn’t catch the exception, the stack trace displays and no further output occurs, so AEC was the output printed before the stack trace.
What is printed besides the stack trace caused by the NullPointerException from line 16?
❌ A. AE ❌ B. AEBCD ✅ C. AEC ❌ D. AECD ❌ E. No output appears other than the stack trace
Explanation: The main() method invokes go and A is printed on line 3. The stop method is invoked and E is printed on line 14. Line 16 throws a NullPointerException, so stop immediately ends and line 17 doesn’t execute. The exception isn’t caught in go, so the go method ends as well, but not before its finally block executes and C is printed on line 9. Because main() doesn’t catch the exception, the stack trace displays and no further output occurs, so AEC was the output printed before the stack trace.
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Telegram and Signal Havens for Right-Wing Extremists
Since the violent storming of Capitol Hill and subsequent ban of former U.S. President Donald Trump from Facebook and Twitter, the removal of Parler from Amazon’s servers, and the de-platforming of incendiary right-wing content, messaging services Telegram and Signal have seen a deluge of new users. In January alone, Telegram reported 90 million new accounts. Its founder, Pavel Durov, described this as “the largest digital migration in human history.” Signal reportedly doubled its user base to 40 million people and became the most downloaded app in 70 countries. The two services rely on encryption to protect the privacy of user communication, which has made them popular with protesters seeking to conceal their identities against repressive governments in places like Belarus, Hong Kong, and Iran. But the same encryption technology has also made them a favored communication tool for criminals and terrorist groups, including al Qaeda and the Islamic State.