2026年最新の1z1-809問題集を試そう！更新されたOracle試験合格させます [Q73-Q90]

2026年最新の1z1-809問題集を試そう！更新されたOracle試験合格させます

最新の1z1-809試験問題集でOracle試験にはトレーニングを提供しています

質問 # 73
Given the code fragment:

What is the result?

A. 0
B. 1
C. 2
D. Compilation fails.

正解：C

質問 # 74
Given the code fragments:
public class Book implements Comparator<Book> {
String name;
double price;
public Book () {}
public Book(String name, double price) {
this.name = name;
this.price = price;
}
public int compare(Book b1, Book b2) {
return b1.name.compareTo(b2.name);
}
public String toString() {
return name + ":" + price;
}
}
and
List<Book>books = Arrays.asList (new Book ("Beginning with Java", 2), new book ( "A
Guide to Java Tour", 3));
Collections.sort(books, new Book());
System.out.print(books);
What is the result?

A. A compilation error occurs because the Book class does not override the abstract method compareTo ().
B. An Exceptionis thrown at run time.
C. [Beginning with Java:2, A Guide to Java Tour:3]
D. [A Guide to Java Tour:3, Beginning with Java:2]

正解：D

質問 # 75
Given:
public class Counter {
public static void main (String[ ] args) {
int a = 10;
int b = -1;
assert (b >=1) : "Invalid Denominator";
int = a / b;
System.out.println (c);
}
}
What is the result of running the code with the option?

A. 0
B. 1
C. A compilation error occurs.
D. An AssertionError is thrown.

正解：D

質問 # 76
Given the code fragment:

Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, userName, and passWordexists The Employeetable has a column ID of type integer and the SQL query matches one record.
What is the result?

A. Compilation fails at line 14.
B. The code prints the employee ID.
C. Compilation fails at line 15.
D. The code prints Error.

正解：A

質問 # 77
Given the information: The employee table has 10 records.
Given the code fragment:

What is the result?

A. deletes the second row and prints the emp_id of the first row
B. deletes the first row and prints the emp_id of the second row
C. throws a runtime exception at Line n1
D. deletes the first row and throws an exception at Line n2

正解：D

質問 # 78
Given the code fragment:

What is the result?

A. 1 2 3
B. 1 2 3 4
followed by an ArrayIndexOutOfBoundsException
C. 1 2 3 4
D. Compilation fails.

正解：A

質問 # 79
Given:

and

Which interface from the java.util.function package should you use to refactor the class Txt?

A. Supplier
B. Function
C. Predicate
D. Consumer

正解：B

解説：
References:

質問 # 80
Given the code fragment:

and the information:
* The required database driver is configured in the classpath.
* The appropriate database is accessible with the dbURL, username, and passWord exists.
What is the result?

A. A SQLException is thrown at runtime.
B. A ClassNotFoundException is thrown at runtime.
C. The program prints nothing.
D. The program prints Connection Established.

正解：D

質問 # 81
Given:

and the code fragment:

What is the result?

A. 2000.0
B. 1500.0
C. A compilation error occurs.
D. 0.0

正解：B

質問 # 82
Given the code fragment:
List<String> codes = Arrays.asList ("DOC", "MPEG", "JPEG");
codes.forEach (c -> System.out.print(c + " "));
String fmt = codes.stream()
.filter (s-> s.contains ("PEG"))
.reduce((s, t) -> s + t).get();
System.out.println("\n" + fmt);
What is the result?
DOC MPEG JPEG

A. MPEGJPEG
B. The order of the output is unpredictable.
C. MPEGJPEG
DOC MPEG MPEGJPEG
D. MPEGMPEGJPEG
MPEGJPEG

正解：C

質問 # 83
Given the code fragments:

and

Which two modifications enable to sort the elements of the empslist? (Choose two.)

A. Replace line n1 with
class Person extends Comparator<Person>
B. At line n2 insert
public int compareTo (Person p) {
return this.name.compareTo (p.name);
}
C. At line n2 insert
public int compare (Person p1, Person p2) {
return p1.name.compareTo (p2.name);
}
D. Replace line n1 with
class Person implements Comparator<Person>
E. At line n2 insert:
public int compareTo (Person p, Person p2) {
return p1.name.compareTo (p2.name);
}
F. Replace line n1 with
class Person implements Comparable<Person>

正解：B、F

質問 # 84
Given the code fragment:
List<Integer> codes = Arrays.asList (10, 20);
UnaryOperator<Double> uo = s -> s +10.0;
codes.replaceAll(uo);
codes.forEach(c -> System.out.println(c));
What is the result?

A. 0
B. 20.0
30.0
C. A NumberFormatExceptionis thrown at run time.
D. A compilation error occurs.

正解：B

質問 # 85
Given:
class UserException extends Exception { }
class AgeOutOfLimitException extends UserException { }
and the code fragment:
class App {
public void doRegister(String name, int age)
throws UserException, AgeOutOfLimitException {
if (name.length () <= 60) {
throw new UserException ();
} else if (age > 60) {
throw new AgeOutOfLimitException ();
} else {
System.out.println("User is registered.");
}
}
public static void main(String[ ] args) throws UserException {
App t = new App ();
t.doRegister("Mathew", 60);
}
}
What is the result?

A. User is registered.
B. An AgeOutOfLimitException is thrown.
C. A UserException is thrown.
D. A compilation error occurs in the main method.

正解：C

質問 # 86
Given the code fragment:
ZonedDateTime depart = ZonedDateTime.of(2015, 1, 15, 3, 0, 0, 0, ZoneID.of("UTC-7")); ZonedDateTime arrive = ZonedDateTime.of(2015, 1, 15, 9, 0, 0, 0, ZoneID.of("UTC-5")); long hrs = ChronoUnit.HOURS.between(depart, arrive); //line n1 System.out.println("Travel time is" + hrs + "hours"); What is the result?

A. Travel time is 8 hours
B. An exception is thrown at line n1.
C. Travel time is 6 hours
D. Travel time is 4 hours

正解：B

質問 # 87
Given the code fragment:
List<Integer> nums = Arrays.asList (10, 20, 8):
System.out.println (
//line n1
);
Which code fragment must be inserted at line n1to enable the code to print the maximum number in the numslist?