Free Oracle 1Z0-816 Exam Dumps Questions & Answers

Given:

Which is true about line 1?

• A.  If the value is not present, nothing is done.
• B.  It always executes the System.out::print statement.
• C.  If the value is not present, a NullPointerException is thrown at run time.
• D.  If the value is not present, a NoSuchElementException is thrown at run time.

Given:
jdeps -jdkinternals C:\workspace4\SimpleSecurity\jar\classes.jar
Which describes the expected output?

• A.  jdeps lists the module dependencies and the package names of all referenced JDK internal APIs. If any are found, the suggested replacements are output in the console.
• B.  jdeps outputs an error message that the -jdkinternals option requires either the -summary or the - verbose options to output to the console.
• C.  The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.
• D.  The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.

Given:

You want the code to produce this output:
John
Joe
Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?

• A.  Insert Comparable<Person> on line 1.
  Insert
  public int compare(Person p1, Person p2) {
  return p1.name.compare(p2.name);
  }
  on line 2.
• B.  Insert Comparator<Person> on line 1.
  Insert
  public int compare(Person p1, Person p2) {
  return p1.name.compare(p2.name);
  }
  on line 2.
• C.  Insert Comparator<Person> on line 1.
  Insert
  public int compareTo(Person person) {
  return person.name.compareTo(this.name);
  }
  on line 2.
• D.  Insert Comparator<Person> on line 1.
  Insert
  public int compare(Person person) {
  return person.name.compare(this.name);
  }
  on line 2.

Given:

Which two are correct? (Choose two.)

• A.  The output will be exactly 2 1 3 4 5.
• B.  The program prints 1 4 2 3, but the order is unpredictable.
• C.  Replacing forEach() with forEachOrdered(), the program prints 1 2 3 4 5.
• D.  Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5.
• E.  Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5, but the order is unpredictable.

Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

• A.  A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
• B.  To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
• C.  A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
• D.  An implementation of country.countryDetails can be added to the main module.
• E.  To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.