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Free Oracle 1Z0-830 Exam Questions

Absolute Free 1Z0-830 Exam Practice for Comprehensive Preparation 

  • Oracle 1Z0-830 Exam Questions
  • Provided By: Oracle
  • Exam: Java SE 21 Developer Professional
  • Certification: Oracle Java
  • Total Questions: 84
  • Updated On: Apr 04, 2025
  • Rated: 4.9 |
  • Online Users: 168
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  • Question 1
    • Which of the following statements oflocal variables declared with varareinvalid?(Choose 4) 

      Answer: B,C,D,E
  • Question 2
    • Given: java double amount = 42_000.00; NumberFormat format = NumberFormat.getCompactNumberInstance(Locale.FRANCE, NumberFormat.Style. SHORT); System.out.println(format.format(amount)); What is the output?

      Answer: D
  • Question 3
    • Which three of the following are correct about the Java module system? 

      Answer: B,C,F
  • Question 4
    • Given: java String bread = optionalName.orElse("Baguette"); System.out.print("bread:" + bread); String dish = optionalName.orElseGet(() -> "Frog legs"); System.out.print(", dish:" + dish); try { String cheese = optionalName.orElseThrow(() -> new Exception()); System.out.println(", cheese:" + cheese); } catch (Exception exc) { System.out.println(", no cheese."); } What is printed?

      Answer: B
  • Question 5
    • Given: java public class Test { public static void main(String[] args) throws IOException { Path p1 = Path.of("f1.txt"); Path p2 = Path.of("f2.txt"); Files.move(p1, p2); Files.delete(p1); } } In which case does the given program throw an exception?

      Answer: C
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