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What must be true about valid equals() and hashCode() methods? O 01.equals(02) = o1.hashCodel) == 02.hashCode() O 01.hashCode() == 02.hashCode = 01.equals(02) O !01.equals(o2) = 01.hashCode() != 02.hashCode() O 01.hashCode() != 02.hashCode() = !o1.equals(o2) O hashCode must have a low collision rate for the hash table to work correctly

What must be true about valid equals() and hashCode() methods? O 01.equals(02) = o1.hashCodel) == 02.hashCode() O 01.hashCode() == 02.hashCode = 01.equals(02) O !01.equals(o2) = 01.hashCode() != 02.hashCode() O 01.hashCode() != 02.hashCode() = !o1.equals(o2) O hashCode must have a low collision rate for the hash table to work correctly

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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What must be true about valid equals() and hashCode() methods? O 01.equals(02) = o1.hashCodel) == 02.hashCode() O 01.hashCode() == 02.hashCode = 01.equals(02) O !01.equals(o2) = 01.hashCode() != 02.hashCode() O 01.hashCode() != 02.hashCode() = !o1.equals(o2) O hashCode must have a low collision rate for the hash table to work correctly
Transcribed Image Text:What must be true about valid equals() and hashCode() methods? O 01.equals(02) = o1.hashCodel) == 02.hashCode() O 01.hashCode() == 02.hashCode = 01.equals(02) O !01.equals(o2) = 01.hashCode() != 02.hashCode() O 01.hashCode() != 02.hashCode() = !o1.equals(o2) O hashCode must have a low collision rate for the hash table to work correctly
If I have the following code Map<Cat, Dog> x = new TreeMap<Cat,Dog>(); which of the following statements are true? O If you override Cat.equals you must override Cat.hashCode You must override Cat.equals O You must override Dog.equals Cat must be comparable Dog must be comparable
Transcribed Image Text:If I have the following code Map<Cat, Dog> x = new TreeMap<Cat,Dog>(); which of the following statements are true? O If you override Cat.equals you must override Cat.hashCode You must override Cat.equals O You must override Dog.equals Cat must be comparable Dog must be comparable
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