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1Z0-816 Certification Detail Exam Code
1Z0-816
Full Exam Name
Oracle Java SE 11 Programmer II
Number of Questions
80
Practice Exams
1Z0-816 Online Practice Exam
Passing Score
63%
Time Limit
180 minutes
Recommended Training
Java SE: Programming II Java Programming Learning Subscription Core Java Learning Subscription Unlimited Product Learning Subscription
Syllabus Topics for Oracle 1Z0-816 Exam Topic Name Java Fundamentals Java Interfaces Functional Interface and Lambda Expressions Built-in Functional Interfaces Migration to a Modular Application Concurrency I/O (Fundamentals and NIO2) Database Applications with JDBC Annotations Exception Handling and Assertions Generics and Collections Java Stream API Lambda Operations on Streams Services in a Modular Application Parallel Streams Secure Coding in Java SE Application Localization
Oracle 1Z0-816 Exam Questions
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01. Which interface in the java.util.function package can return a primitive type? Option a) ToDoubleFunction b) Supplier
c) BiFunction d) LongConsumer
ANSWER a) ToDoubleFunction
02. Which two statements independently compile? (Choose two.) Option a) List<? super Short> list = new ArrayList<Number>(); b) List<? super Number> list = new ArrayList<Integer>();
c) List<? extends Number> list = new ArrayList<Byte>(); d) List<? extends Number> list = new ArrayList<Object>(); e) Listlist = new ArrayList();
ANSWER a) List<? super Short> list = new ArrayList<Number>(); c) List<? extends Number> list = new ArrayList<Byte>();
03. var numbers = List.of(0,1,2,3,4,5,6,7,8,9); You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.) Option a) double avg = numbers.stream().parallel().averagingDouble(a −> a); b) double avg = numbers.parallelStream().mapToInt (m −> m).average().getAsDouble();
c) double avg = numbers.stream().mapToInt (i −> i).average().parallel(); d) double avg = numbers.stream().average().getAsDouble();
ANSWER b) double avg = numbers.parallelStream().mapToInt (m â&#x2C6;&#x2019;> m).average().getAsDouble();
04. Which code fragment does a service use to load the service provider with a Print interface? Option a) private Print print = com.service.Provider.getInstance(); b) private java.util.ServiceLoader loader = ServiceLoader.load(Print.class); c) private java.util.ServiceLoader loader = new java.util.ServiceLoader<>();
d) private Print print = new com.service.Provider.PrintImpl();
ANSWER b) private java.util.ServiceLoader loader = ServiceLoader.load(Print.class);
05. Which two are guidelines for preventing denial of service attacks? Option a) Release resources in all cases. b) Resource limit checks should not suffer from numeric overflow. c) Purge sensitive information from exceptions. d) Validate file formats before processing untrusted files.
e) Make public static fields final. f) Use mutable classes whenever possible.
ANSWER a) Release resources in all cases. b) Resource limit checks should not suffer from numeric overflow.
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