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Oracle 1Z0-819 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Deploy and execute modular applications, including automatic modules
  • Implement functional interfaces using lambda expressions
Topic 2
  • Handle text using String and StringBuilder classes
  • Utilize polymorphism and casting to call methods, differentiate object type versus reference type
Topic 3
  • Create and use subclasses and superclasses, including abstract classes
  • Use local variable type inference, including as lambda parameters
Topic 4
  • Understand variable scopes, apply encapsulation and make objects immutable
  • Connect to and perform database SQL operations, process query results using JDBC API
Topic 5
  • Develop code that mitigates security threats such as denial of service
  • Use Java Streams to filter, transform and process data
Topic 6
  • Define and use fields and methods, including instance, static and overloaded methods
  • Working with Arrays and Collections
Topic 7
  • Implement serialization and deserialization techniques on Java objects
  • Declare and instantiate Java objects including nested class objects
Topic 8
  • Secure resource access including filesystems, manage policies and execute privileged code
  • Develop thread-safe code, using different locking mechanisms

Oracle Java SE 11 Developer Sample Questions (Q129-Q134):

NEW QUESTION # 129
Given:

Which three are true? (Choose three.)

  • A. b1.foo(c) prints Hello world!
  • B. f2.foo(c) prints Ola Mundo!
  • C. f1.foo(c) prints Ola Mundo!
  • D. f2.foo(c) prints Hello world!
  • E. f2.foo(c) prints Bonjour le monde!
  • F. f1.foo(c) prints Bonjour le monde!
  • G. b1.foo(c) prints Ola Mundo!
  • H. f1.foo(c) prints Hello world!
  • I. b1.foo(c) prints Bonjour le monde!

Answer: E,G,H


NEW QUESTION # 130
Given:

What is the result?

  • A. NullPointerException is thrown at line 4.
  • B. NullPointerException is thrown at line 10.
  • C. Hello
  • D. A compilation error occurs.

Answer: C

Explanation:


NEW QUESTION # 131
Given the code fragment:

Which two statement inserted independently at line 1 enable this code to print PRRT?

  • A. break a ;
  • B. break b;
  • C. continue a;
  • D. i-;
  • E. j--;
  • F. continue b;

Answer: A


NEW QUESTION # 132
Given:
/code/a/Test.java
containing:

and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?

  • A. java -cp /code a.Test
  • B. javac -d /code /code/a/Test.java /code/b/Best.java
  • C. javac -d /code /code/a/Test.java
  • D. java /code/a/Test.java /code/b/Best.java
  • E. java /code/a/Test.java
  • F. javac -d /code /code/a/Test

Answer: B


NEW QUESTION # 133
Given the code fragment:

Which code fragment replaces the for statement?

  • A. intstream.rangeclosed(l, 100).mapToObj{FizzBuzz::convert).forEach(System.out::printIn);
  • B. IntStream.ranged, 100).map(FizzBuzz::convert).forEach(System.out::println);
  • C. IntStream.range(1, 100).mapToObj(FizzBuzz::convert).forEach(System.out::println);
  • D. IntStream.rangeClosed(l, 100).map(FizzBuzz::convert).forEach(System.out::println);

Answer: D


NEW QUESTION # 134
......

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