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Oracle 1z0-804 Exam Actual Questions

The questions for 1z0-804 were last updated on Sept. 30, 2024.
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  • Viewing questions 1-4 out of 150 questions

Topic 1 - Single Topic

Question #1 Topic 1

Given:

Which three values will appear in the output?

  • A. 5
  • B. 7
  • C. a1
  • D. a2
  • E. b1
  • F. b2 ADE
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Correct Answer: Explanation 🗳️
Static method of base class is invoked >>
A myA = new B();
System.out.print(myA.doA() + myA.doA2() + myA.a);
class B String doA() { return "b1 "; }
class A protected static String doA2 () { return "a2 "; }
class B int a = 7;

Question #2 Topic 1

Given:

What is the result?

  • A. false false
  • B. true false
  • C. true true
  • D. Compilation fails
  • E. An exception is thrown at runtime
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Correct Answer: A 🗳️
(this == obj) is the object implementation of equals() and therefore FALSE, if the reference points to various objects and then the super.equals() is invoked, the object method equals() what still result in FALSE better override of equals() is to compare the attributes like: public boolean equals (Object obj) { if (obj != null){
Product p = (Product)obj;
return this.id == p.id;
}
return false;
}

Question #3 Topic 1

Given:

What is the result?

  • A. tolting cantering tolting
  • B. cantering cantering cantering
  • C. compilation fails
  • D. an exception is thrown at runtime
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Correct Answer: C 🗳️
Compiler says: Cannot reduce the visibility of the inherited method from Rideable. mssen PUBLIC sein public String ride() { return "cantering "; } public String ride() { return "tolting "; } if this is given then the result would be:
A : tolting cantering tolting

Question #4 Topic 1

Which four are syntactically correct?

  • A. package abc; package def; import Java.util . * ; public class Test { }
  • B. package abc; import Java.util.*; import Java.util.regex.* ; public class Test { }
  • C. package abc; public class Test {} import Java.util.* ;
  • D. import Java.util.*; package abc; public class Test {}
  • E. package abc; import java.util. *; public class Test{}
  • F. public class Test{} package abc; import java.util.*{}
  • G. import java.util.*; public class Test{}
  • H. package abc; public class test {}
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Correct Answer: BEGH 🗳️

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C (25%)
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