Exam 1z0-809 topic 1 question 34 discussion

Actual exam question from Oracle's 1z0-809

Question #: 34
Topic #: 1

Given:
public class Test<T> {
private T t;
public T get () {
return t;
}
public void set (T t) {
this.t = t;
}
public static void main (String args [ ] ) {
Test<String> type = new Test<>();
Test type 1 = new Test (); //line n1
type.set("Java");
type1.set(100); //line n2
System.out.print(type.get() + " " + type1.get());
}
}
What is the result?

A. Java 100
B. java.lang.string@<hashcode>java.lang.Integer@<hashcode>
C. A compilation error occurs. To rectify it, replace line n1 with: Test<Integer> type1 = new Test<>();
D. A compilation error occurs. To rectify it, replace line n2 with: type1.set (Integer(100));

Show Suggested Answer

Suggested Answer: A 🗳️

by jduarte at Feb. 2, 2021, 7:23 p.m.

Comments

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jduarte

Highly Voted 3 years, 11 months ago

Answer A. tested

upvoted 8 times

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asdfjhfgjuaDCV

Most Recent 9 months, 3 weeks ago

A is the correct answer public class Test<T> { private T t; public T get() { return t; } public void set(T t) { this.t = t; } public static void main(String args[]) { Test<String> type = new Test<>(); Test type1 = new Test<>(); // corrected line n1 type.set("Java"); type1.set(100); // corrected line n2 System.out.print(type.get() + " " + type1.get()); } }

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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DangNHH

1 year, 9 months ago

Answer A At line n1, Generic type data was not defined. Thus, line n2 is valid. The generic type will be set as an integer. Test type 1 = new Test (); //line n1 type1.set(100); //line n2 Besides, the variable name "type 1" should be removed space.

upvoted 2 times

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r1muka5

1 year, 10 months ago

Correct answer is C, the space should be removed.

upvoted 1 times

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WilsonKKerll

2 years, 9 months ago

Answer is A.

upvoted 1 times

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YasinGaber

2 years, 10 months ago

I think answer should be C, because at line #1 there is a space in (type 1), it has to be either (type1) or (type<Integer>1): public class TestCode<T> { private T t; public T get () { return t; } public void set (T t) { this.t = t; } public static void main(String[] args) { TestCode<String> type = new TestCode<>(); TestCode<Integer> type1 = new TestCode (); //line n1 type.set("Java"); type1.set(100); //line n2 System.out.print(type.get() + " " + type1.get()); } }

upvoted 1 times

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