Exam 1z0-809 topic 1 question 17 discussion

Actual exam question from Oracle's 1z0-809

Question #: 17
Topic #: 1

Given:
class Book {
int id;
String name;
public Book (int id, String name) {
this.id = id;
this.name = name;
}
public boolean equals (Object obj) { //line n1
boolean output = false;
Book b = (Book) obj;
if (this.name.equals(b name))}
output = true;
}
return output;
}
}
and the code fragment:
Book b1 = new Book (101, "Java Programing");
Book b2 = new Book (102, "Java Programing");
System.out.println (b1.equals(b2)); //line n2
Which statement is true?

A. The program prints true.
B. The program prints false.
C. A compilation error occurs. To ensure successful compilation, replace line n1 with: boolean equals (Book obj) {
D. A compilation error occurs. To ensure successful compilation, replace line n2 with: System.out.println (b1.equals((Object) b2));

Show Suggested Answer

Suggested Answer: A 🗳️

by M_Jawad at Jan. 13, 2020, 1:37 p.m.

Comments

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M_Jawad

Highly Voted 4 years, 11 months ago

the code prints true

upvoted 10 times

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asdfjhfgjuaDCV

Most Recent 9 months, 4 weeks ago

A is the correct answer

upvoted 1 times

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steefaand

10 months, 3 weeks ago

Selected Answer: A

A is correct.

upvoted 1 times

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duydn

1 year, 3 months ago

Selected Answer: A

Code compile successfully and override the equals() correct -> TRUE -> A

upvoted 1 times

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r1muka5

1 year, 10 months ago

Correct answer is A: public class Book { int id; String name; public Book(int id, String name) { this.id = id; this.name = name; } @Override public boolean equals(Object obj) { boolean output = false; Book b = (Book) obj; if (this.name.equals(b.name)) { output = true; } return output; } } public class Main { public static void main(String[] args) { Book b1 = new Book(101, "Java Programing"); Book b2 = new Book(102, "Java Programing"); System.out.println(b1.equals(b2)); } }

upvoted 1 times

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Svetleto13

3 years, 8 months ago

A,tested

upvoted 4 times

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