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单选题
Given that the elements of a PriorityQueue are ordered according to natural ordering，and： What is the result？（）
A
apple pear
B
banana pear
C
apple apple
D
apple banana
E
banana banana
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Assuming that the serializeBanana2（） and the deserializeBanana2（） methods will correctly use Java serialization and given： import java.io.*； class Food {Food（） { System.out.print（”1”）； } } class Fruit extends Food implements Serializable { Fruit（） { System.out.print（”2”）； } } public class Banana2 extends Fruit { int size = 42； public static void main（String [] args） { Banana2 b = new Banana2（）； b.serializeBanana2（b）； // assume correct serialization b = b.deserializeBanana2（b）； // assume correct System.out.println（” restored “+ b.size + “ “）； } // more Banana2 methods } What is the result？（） A、 Compilation fails.B、 1 restored 42C、 12 restored 42D、 121 restored 42E、 1212 restored 42F、 An exception is thrown at runtime.
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Assuming that the serializeBanana（） and the deserializeBanana（） methods will correctly use Java serialization and given： import java.io.*； class Food implemertts Serializable {int good = 3；} class Fruit externds Food {int juice = 5；} public class Banana extends Fruit { int yellow = 4； public static void main（String [] args） { Banana b = new Banana（）； Banana b2 = new Banana（）； b.serializeBanana（b）； // assume correct serialization b2 = b.deserializeBanana（）； // assume correct System.out.println（”restore “+b2.yellow+ b2.juice+b2.good）； } // more Banana methods go here } What is the result？（） A、 restore 400B、 restore 403C、 restore 453D、 Compilation fails.E、 An exception is thrown at runtime.
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单选题import java.util.*； public class PQ { public static void main（String[] args） { PriorityQueue pq = new PriorityQueue（）； pq.add（”carrot”）； pq.add（”apple”）； pq.add（”banana”）； System.out.println（pq.poll（） +”：” + pq.peek（））； } } What is the result？（）A
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单选题If you find a hard and green apple that is not sour, you should _____.A
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单选题Assuming that the serializeBanana2（） and the deserializeBanana2（） methods will correctly use Java serialization and given： import java.io.*； class Food {Food（） { System.out.print（”1”）； } } class Fruit extends Food implements Serializable { Fruit（） { System.out.print（”2”）； } } public class Banana2 extends Fruit { int size = 42； public static void main（String [] args） { Banana2 b = new Banana2（）； b.serializeBanana2（b）； // assume correct serialization b = b.deserializeBanana2（b）； // assume correct System.out.println（” restored “+ b.size + “ “）； } // more Banana2 methods } What is the result？（）A
Compilation fails.B
1 restored 42C
12 restored 42D
121 restored 42E
1212 restored 42F
An exception is thrown at runtime.
考题
单选题Do you like an apple or a banana?（）A
Thank youB
You are so niceC
I want orangesD
Either will do
考题
单选题Assuming that the serializeBanana（） and the deserializeBanana（） methods will correctly use Java serialization and given： import java.io.*； class Food implemertts Serializable {int good = 3；} class Fruit externds Food {int juice = 5；} public class Banana extends Fruit { int yellow = 4； public static void main（String [] args） { Banana b = new Banana（）； Banana b2 = new Banana（）； b.serializeBanana（b）； // assume correct serialization b2 = b.deserializeBanana（）； // assume correct System.out.println（”restore “+b2.yellow+ b2.juice+b2.good）； } // more Banana methods go here } What is the result？（）A
restore 400B
restore 403C
restore 453D
Compilation fails.E
An exception is thrown at runtime.
考题
单选题import java.util.*； class Banana3 ｛ public static void main（String [] args） ｛ int x ＝ 2； Banana3 b ＝ new Banana3（）； b.go（x）； ｝ static ｛ x +＝ x； ｝ void go（int x） ｛ ++x； System.out.println（x）； ｝ ｝ 结果为：（）A
2B
3C
5D
编译失败
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