Oracle 1Z0-853 問題集

質問 1：
DRAG DROP
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正解：


質問 2：
Given:
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public class Person {
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private String name, comment;
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private int age;
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public Person(String n, int a, String c) {
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name = n; age = a; comment = c;
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}
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public boolean equals(Object o) {
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if (! (o instanceof Person)) return false; 19, Person p = (Person)o;
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return age == p.age && name.equals(p.name);
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}
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}
What is the appropriate definition of the hashCode method in class Person?
A. return name.hashCode() + age * 7;
B. return name.hashCode() + comment.hashCode() / 2;
C. return name.hashCode() + comment.hashCode() / 2 - age * 3;
D. return super.hashCode();
正解：A

質問 3：
DRAG DROP
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正解：


質問 4：
DRAG DROP
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正解：


質問 5：
DRAG DROP
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正解：


質問 6：
Which three statements concerning the use of the java.io.Serializable interface are true? (Choose three.)
A. It is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable.
B. An object serialized on one JVM can be successfully deserialized on a different JVM.
C. The values in fields with the volatile modifier will NOT survive serialization and deserialization.
D. The values in fields with the transient modifier will NOT survive serialization and deserialization.
E. Objects from classes that use aggregation cannot be serialized.
正解：A,B,D