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Oracle 1Z0-819 Exam
- Topic 1: Define and use fields and methods, including instance, static and overloaded methods/ Working with Arrays and Collections
- Topic 2: Create and use subclasses and superclasses, including abstract classes/ Use local variable type inference, including as lambda parameters
- Topic 3: Understand variable scopes, apply encapsulation and make objects immutable/ Connect to and perform database SQL operations, process query results using JDBC API
- Topic 4: Handle text using String and StringBuilder classes/ Utilize polymorphism and casting to call methods, differentiate object type versus reference type
- Topic 5: Implement serialization and deserialization techniques on Java objects/ Declare and instantiate Java objects including nested class objects
- Topic 6: Create and use interfaces, identify functional interfaces/ Initialize objects and their members using instance and static initialiser statements and constructors
- Topic 7: Deploy and execute modular applications, including automatic modules/ Implement functional interfaces using lambda expressions
- Topic 8: Develop code that mitigates security threats such as denial of service/ Use Java Streams to filter, transform and process data
- Topic 9: Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting/ Sort collections and arrays using Comparator and Comparable interfaces
- Topic 10: Secure resource access including filesystems, manage policies and execute privileged code/ Develop thread-safe code, using different locking mechanisms
Free Oracle 1Z0-819 Exam Actual Questions
The questions for 1Z0-819 were last updated On Feb. 02, 2023
Why would you choose to use a peek operation instead of a forEach operation on a Stream?
And the code fragment:
Which situation will occur on code fragment execution?
Given the code fragment:
You want to display the value of currency as $100.00.
Which code inserted on line 1 will accomplish this?
Your organization makes mlib.jar available to your cloud customers. While working on a new feature for mlib.jar, you see that the customer visible method
public void enableService(String hostName, String portNumber)
executes this code fragment
and you see this grant is in the security policy file:
What security vulnerability does this expose to your cloud customer's code?
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI
module?
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