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Oracle 1Z0-819 Exam Syllabus Topics:

Topic Details
Topic 1
  • Handle text using String and StringBuilder classes
  • Utilize polymorphism and casting to call methods, differentiate object type versus reference type
Topic 2
  • Create and use interfaces, identify functional interfaces
  • Initialize objects and their members using instance and static initialiser statements and constructors
Topic 3
  • Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
  • Sort collections and arrays using Comparator and Comparable interfaces
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
  • Secure resource access including filesystems, manage policies and execute privileged code
  • Develop thread-safe code, using different locking mechanisms
Topic 6
  • Implement serialization and deserialization techniques on Java objects
  • Declare and instantiate Java objects including nested class objects
Topic 7
  • Define and use fields and methods, including instance, static and overloaded methods
  • Working with Arrays and Collections
Topic 8
  • Deploy and execute modular applications, including automatic modules
  • Implement functional interfaces using lambda expressions
Topic 9
  • Create and use subclasses and superclasses, including abstract classes
  • Use local variable type inference, including as lambda parameters

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Oracle Java SE 11 Developer Sample Questions (Q72-Q77):

NEW QUESTION # 72
Given:

What is the result?

  • A. 2,54,54,5
  • B. 2,34,54,3
  • C. 2,34,54,5
  • D. 2,34,34,5

Answer: A Explanation:

NEW QUESTION # 73
Given:

When is the readObject method called?

  • A. The method is never called.
  • B. before this object Is serialized
  • C. before this object is deserialized
  • D. after this object is serialized
  • E. after this object is deserialized

Answer: E
NEW QUESTION # 74
Given:

Which is true?

  • A. The code throws an exception at runtime.
  • B. The code prints 25.
  • C. The code compiles but does not print any result.
  • D. The code does not compile.

Answer: D
NEW QUESTION # 75
Given:

and
checkQuality(QUALITY.A);
and

Which code fragment can be inserted into the switch statement to print Best?

  • A. A
  • B. QUALITY.A
  • C. QUALITY.A.ValueOf()
  • D. A.toString()

Answer: A
NEW QUESTION # 76
Given:

Which two interfaces can be used in lambda expressions? (Choose two.)

  • A. MyInterface3
  • B. MyInterface2
  • C. MyInterface1
  • D. MyInterface4
  • E. MyInterface5

Answer: B,E
NEW QUESTION # 77
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