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Oracle 1z1-809 certification exam is designed to measure the candidate's knowledge and skills required to work with Java Standard Edition 8 (Java SE 8) technologies. It is the second-level certification exam for Java programmers, following the Oracle Certified Associate (OCA) exam. 1z1-809 exam covers a wide range of topics, such as Java class design, generics, collections, concurrency, JDBC API, and much more.

Oracle 1z1-809 Exam is an advanced certification test designed for Java professionals who want to increase their skills in Java programming. It is a Java SE 8 Programmer II exam that makes Java developers competent in advanced Java programming concepts, such as Java Persistence API, Lambda Expressions, Concurrency, Generics and Collections, Java File IO (NIO2), Java Database Connectivity (JDBC), and Java IO Fundamentals.

Oracle Java SE 8 Programmer II Sample Questions (Q107-Q112):

NEW QUESTION # 107
Given the records from the STUDENT table:

Given the code fragment:

Assume that the URL, username, and password are valid.
What is the result?

A. The STUDENT table is not updated and the program prints:114 : John : [email protected]
B. A SQLException is thrown at run time.
C. The STUDENT table is updated with the record:113 : Jannet : [email protected] the program prints:113 : Jannet : [email protected]
D. The STUDENT table is updated with the record:113 : Jannet : [email protected] the program prints:114 : John : [email protected]

Answer: B

NEW QUESTION # 108
Given the definition of the Emp class:
public class Emp
private String eName;
private Integer eAge;
Emp(String eN, Integer eA) {
this.eName = eN;
this.eAge = eA;
}
public Integer getEAge () {return eAge;}
public String getEName () {return eName;}
}
and code fragment:
List<Emp>li = Arrays.asList(new Emp("Sam", 20), New Emp("John", 60), New Emp("Jim", 51));
Predicate<Emp> agVal = s -> s.getEAge() > 50;//line n1
li = li.stream().filter(agVal).collect(Collectors.toList());
Stream<String> names = li.stream()map.(Emp::getEName);//line n2
names.forEach(n -> System.out.print(n + " "));
What is the result?

A. A compilation error occurs at line n2.
B. Sam John Jim
C. A compilation error occurs at line n1.
D. John Jim

Answer: D

NEW QUESTION # 109
Which two reasons should you use interfaces instead of abstract classes?

A. You want to declare non-static on non-final fields.
B. You want to share code among several closely related classes.
C. You want to take advantage of multiple inheritance of type.
D. You expect that unrelated classes would implement your interfaces.
E. You expect that classes that implement your interfaces have many common methods or fields, or require access modifiers other than public.

Answer: C,E

Explanation:
Explanation/Reference:
Reference: http://www.programmerinterview.com/index.php/java-questions/interface-vs-abstract-class/

NEW QUESTION # 110
Which statement is true about the single abstract method of the java.util.function.Function interface?

A. It accepts one argument and always produces a result of the same type as the argument.
B. It accepts an argument and produces a result of any data type.
C. It accepts one argument and returns boolean.
D. It accepts one argument and returns void.

Answer: B

NEW QUESTION # 111
Given the code fragment:
List<String> listVal = Arrays.asList("Joe", "Paul", "Alice", "Tom");
System.out.println (
// line n1
);
Which code fragment, when inserted at line n1, enables the code to print the count of string elements whose length is greater than three?

A. listVal.stream().filter(x -> x.length()>3).mapToInt(x -> x).count()
B. listVal.stream().filter(x -> x.length()>3).count()
C. listVal.stream().peek(x -> x.length()>3).count().get()
D. listVal.stream().map(x -> x.length()>3).count()

Answer: B

NEW QUESTION # 112
......

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