❌ A. Max Integer: 4 Max Double: 3.3 ❌ B. Max Integer: 2 Max Double: 2.2 ❌ C. Max Integer: 1 Max Double: 1.1 ✅ D. Compilation error ❌ E. Runtime error
Explanation: 1. Method Overloading with Generics: • There are two overloaded findMax methods, one using extends Number and the other using extends Comparable<T>. • findMax(List<T extends Number>): Compares Number values using doubleValue() for comparison. • findMax(List<T extends Comparable<T>>): Compares values using the compareTo method, which is available for all classes implementing Comparable.
2. Type Inference and Ambiguity: • When the findMax method is called with List<Integer> or List<Double>, Java tries to infer which method to use. • Both Integer and Double implement Comparable<T>, so both methods are applicable. • This results in a method ambiguity error because Java cannot decide whether to use doubleValue() or compareTo() to compare the elements.
3. Compilation Error: • The ambiguity occurs because the Comparable interface is implemented by both Integer and Double, which causes the compiler to be unable to choose between the two overloaded methods.
❌ A. Max Integer: 4 Max Double: 3.3 ❌ B. Max Integer: 2 Max Double: 2.2 ❌ C. Max Integer: 1 Max Double: 1.1 ✅ D. Compilation error ❌ E. Runtime error
Explanation: 1. Method Overloading with Generics: • There are two overloaded findMax methods, one using extends Number and the other using extends Comparable<T>. • findMax(List<T extends Number>): Compares Number values using doubleValue() for comparison. • findMax(List<T extends Comparable<T>>): Compares values using the compareTo method, which is available for all classes implementing Comparable.
2. Type Inference and Ambiguity: • When the findMax method is called with List<Integer> or List<Double>, Java tries to infer which method to use. • Both Integer and Double implement Comparable<T>, so both methods are applicable. • This results in a method ambiguity error because Java cannot decide whether to use doubleValue() or compareTo() to compare the elements.
3. Compilation Error: • The ambiguity occurs because the Comparable interface is implemented by both Integer and Double, which causes the compiler to be unable to choose between the two overloaded methods.
Correct answer: D
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Should You Buy Bitcoin?
In general, many financial experts support their clients’ desire to buy cryptocurrency, but they don’t recommend it unless clients express interest. “The biggest concern for us is if someone wants to invest in crypto and the investment they choose doesn’t do well, and then all of a sudden they can’t send their kids to college,” says Ian Harvey, a certified financial planner (CFP) in New York City. “Then it wasn’t worth the risk.” The speculative nature of cryptocurrency leads some planners to recommend it for clients’ “side” investments. “Some call it a Vegas account,” says Scott Hammel, a CFP in Dallas. “Let’s keep this away from our real long-term perspective, make sure it doesn’t become too large a portion of your portfolio.” In a very real sense, Bitcoin is like a single stock, and advisors wouldn’t recommend putting a sizable part of your portfolio into any one company. At most, planners suggest putting no more than 1% to 10% into Bitcoin if you’re passionate about it. “If it was one stock, you would never allocate any significant portion of your portfolio to it,” Hammel says.
