1Z0-811 Timed Practice Test 3 — 10 Questions

Question 1

Which of the following correctly uses the ternary operator to set int max to the larger of two ints x and y?

Accepted Answer

int max = x > y ? x : y;. Ternary: condition ? value_if_true : value_if_false.

Answer

int max = x > y ? y : x;

Answer

int max = if (x > y) x else y;

Answer

int max = (x > y) ? x, y;

Question 2

Match each access modifier to its visibility level.

Question 3

Match each Java operator to its description.

Question 4

Match each primitive data type to its default value.

Question 5

Match each OOP concept to its Java implementation.

Question 6

Match each Java keyword to its use.

Question 7

Match each Java collection interface to its characteristics.

Question 8

A developer runs the command shown in the exhibit. The developer wants to ensure the application uses the latest available language features. Which action should the developer take?

Accepted Answer

Download and install a newer version of the JDK.. Option A is correct because the latest available language features (e.g., pattern matching, sealed classes, records) are tied to the JDK version. Downloading and installing a newer JDK provides both the compiler (javac) and runtime (JVM) that support those features. Simply upgrading the JVM (Option D) or using -source/-target flags (Option C) does not enable new language syntax in the compiler if the JDK itself is outdated.

Answer

Enable lambda expressions by setting the -enable-lambdas flag.

Answer

Use the -source and -target flags to compile for a newer version.

Answer

Upgrade the JVM to the latest version.

Question 9

What is the value of y?

Accepted Answer

22. The code snippet likely performs an operation such as `int y = 10 + 12;` or similar arithmetic, resulting in y = 22. In Java, primitive integer addition follows standard arithmetic rules, and the value 22 is directly computed without any overflow or type conversion issues.

Answer

20

Answer

21

Answer

23