❌ A. 1 ✅ B. 2 ❌ C. 3 ❌ D. Compilation error ❌ E. Runtime error ❌ F. None of the above
Explanation: In this code snippet, the processMap method uses the computeIfAbsent method of the Map interface. If the specified key is not already associated with a value (or is mapped to null), this method associates it with the result of the given function. In this case, the key "Two" is already present in the map with the value 2. Therefore, the computeIfAbsent method does not execute the provided function (k -> k.length()), and it returns the current value associated with the key "Two," which is 2. Option A might be tempting, but it is incorrect because the computeIfAbsent method doesn't execute the function when the key is already present in the map. Option B is the correct answer, representing the value associated with the existing key "Two." Options C and D are incorrect as there is no compilation error or runtime exception in this code. The behavior is as expected with the use of the computeIfAbsent method.
❌ A. 1 ✅ B. 2 ❌ C. 3 ❌ D. Compilation error ❌ E. Runtime error ❌ F. None of the above
Explanation: In this code snippet, the processMap method uses the computeIfAbsent method of the Map interface. If the specified key is not already associated with a value (or is mapped to null), this method associates it with the result of the given function. In this case, the key "Two" is already present in the map with the value 2. Therefore, the computeIfAbsent method does not execute the provided function (k -> k.length()), and it returns the current value associated with the key "Two," which is 2. Option A might be tempting, but it is incorrect because the computeIfAbsent method doesn't execute the function when the key is already present in the map. Option B is the correct answer, representing the value associated with the existing key "Two." Options C and D are incorrect as there is no compilation error or runtime exception in this code. The behavior is as expected with the use of the computeIfAbsent method.
BY Explanations “Top Java Quiz Questions”
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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.
Traders also expressed uncertainty about the situation with China Evergrande, as the indebted property company has not provided clarification about a key interest payment.In economic news, the Commerce Department reported an unexpected increase in U.S. new home sales in August.Crude oil prices climbed Friday and front-month WTI oil futures contracts saw gains for a fifth straight week amid tighter supplies. West Texas Intermediate Crude oil futures for November rose $0.68 or 0.9 percent at 73.98 a barrel. WTI Crude futures gained 2.8 percent for the week.
