Java SE 17 (1Z0-829) Practice Questions - Oracle Java SE 17 Developer Certified Professional (1Z0-829) Exam - Java SE 17 (1Z0-829) Practice Questions - Oracle Java SE 17 Developer Certified Professional (1Z0-829) Exam

Question 1

Which statement about Java's `var` local-variable type inference (introduced in SE 10) is true in Java SE 17?

`var` can be used as a class field type `var x = null;` is a valid declaration `var` infers the type at compile time and can only be used for local variables, indexes in for-loops, and try-with-resources `var` is a reserved Java keyword and cannot be used as a variable name

Correct Answer:

`var` infers the type at compile time and can only be used for local variables, indexes in for-loops, and try-with-resources

Question 2

Given: ``` int a = 5; int b = 2; double c = a / b; System.out.println(c); ``` What is printed?

2.5 2.0 2 Compilation error

Correct Answer:

2.0

Question 3

What is the value of `s.length()` after `String s = "caf\u00e9";`?

3 4 5 Compilation error

Correct Answer:

Question 4

Which `String` method introduced before Java 17 returns `true` only when the string is empty or contains only whitespace characters as defined by `Character.isWhitespace`?

`isEmpty()` `isBlank()` `strip().isEmpty()` is the only valid approach `trim().equals("")`

Correct Answer:

`isBlank()`

Question 5

Given the text block: ``` String s = """ hello world """; ``` What is the value of `s` (using ` ` to represent a newline)?

`hello world ` ` hello world ` `hello world` Compilation error: text blocks must use double quotes

Correct Answer:

`hello world `

Question 1

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Prepare with the Java SE 17 (1Z0-829) Practice Questions - Oracle Java SE 17 Developer Certified Professional (1Z0-829) Exam practice quiz. This question bank includes 100 questions covering java, string, list, stream, and println. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Java SE 17 (1Z0-829) Practice Questions - Oracle Java SE 17 Developer Certified Professional (1Z0-829) Exam

This practice set contains 100 questions from the matching question bank and focuses on java, string, list, stream, and println. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Java SE 17 (1Z0-829) Practice Questions - Oracle Java SE 17 Developer Certified Professional (1Z0-829) Exam

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