Given: public class Foo { private K key; private V value; public Foo(K key, V value) { this.key = key; this.value = value; } public static Foo twice(T value) { return new Foo (value, value); } public K getKey() { return key; } public V getValue() { return value; } } Which option fails?

A. Foo mark = new Foo ("Steve", 100);

B. Foo pair = Foo.twice("Hello World");

C. Foo percentage = new Foo ("Steve", 100);

D. Foo grade = new Foo <> ("John", "A");

Oracle

1Z0-809 · Question #264

1Z0-809 Question #264: Real Exam Question with Answer & Explanation

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Question

Given:
public class Foo<K, V> {
private K key;
private V value;
public Foo(K key, V value) { this.key = key; this.value = value; }
public static <T> Foo<T, T> twice(T value) { return new Foo<T, T>(value, value); }
public K getKey() { return key; }
public V getValue() { return value; }
}
Which option fails?

Options

AFoo<String, Integer> mark = new Foo<Object, Object>("Steve", 100);
BFoo<String, String> pair = Foo.twice("Hello World");
CFoo<Object, Object> percentage = new Foo<Object, Object>("Steve", 100);
DFoo<String, String> grade = new Foo <> ("John", "A");

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