[Jun-2026] Free 1z1-809 Exam Dumps to Improve Exam Score
2026 Realistic 1z1-809 Dumps Exam Tips Test Pdf Exam Material
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NEW QUESTION # 103
Given the code fragments:
interface CourseFilter extends Predicate<String> {
public default boolean test (String str) {
return str.equals ("Java");
}
}
and
List<String> strs = Arrays.asList("Java", "Java EE", "Java ME");
Predicate<String> cf1 = s - > s.length() > 3;
Predicate cf2 = new CourseFilter() { //line n1
public boolean test (String s) {
return s.contains ("Java");
}
};
long c = strs.stream()
. filter(cf1)
. filter(cf2 //line n2
. count();
System.out.println(c);
What is the result?
- A. A compilation error occurs at line n1.
- B. A compilation error occurs at line n2.
- C. 0
- D. 1
Answer: C
NEW QUESTION # 104
Given the following array:
Which two code fragments, independently, print each element in this array?
- A. Option B
- B. Option D
- C. Option F
- D. Option A
- E. Option E
- F. Option C
Answer: D,E
NEW QUESTION # 105
View the exhibit. Given the code fragment:
Which change enables the code to print the following?
James age: 20
Williams age: 32
- A. Enclosing line 6 and line 7 within a try block and adding: catch(Exception e1) { //code goes here} catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here}
- B. Enclosing line 6 and line 7 within a try block and adding: catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here}
- C. Replacing line 5 with public static void main (String [] args) throws.Exception {
- D. Replacing line 5 with public static void main (String [] args) throws MissingInfoException, AgeOutofRangeException {
Answer: A
NEW QUESTION # 106
Given:
and the code fragment:
What is the result?
- A. 0
- B. An Exceptionis thrown at run time.
- C. 1
- D. A compilation error occurs at line n1.
Answer: D
NEW QUESTION # 107
Given that these files exist and are accessible:
and given the code fragment:
Which code fragment can be inserted at line n1 to enable the code to print only /company/emp?
- A. Stream<Path> stream = Files.walk (Paths.get ("/company"));
- B. Stream<Path> stream = Files.find(Paths.get ("/company"), 1,(p,b) -> b.isDirectory (),
FileVisitOption.FOLLOW_LINKS); - C. Stream<Path> stream = Files.list (Paths.get ("/company/emp"));
- D. Stream<Path> stream = Files.list (Paths.get ("/company"));
Answer: B
NEW QUESTION # 108
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?
- A. nums.stream().max()
- B. nums.stream().max(Integer : : max).get()
- C. nums.stream().map(a -> a).max()
- D. nums.stream().max(Comparator.comparing(a -> a)).get()
Answer: D
NEW QUESTION # 109
Given:
and the code fragment:
What is the result?
- A. A compilation error occurs at line n1.
- B. A compilation error occurs because the tryblock doesn't have a catchor finallyblock.
- C. A compilation error occurs at line n2.
- D. The program compiles successfully.
Answer: B
NEW QUESTION # 110
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?
- A. DOC MPEG JPEG
MPEGJPEG - B. The order of the output is unpredictable.
- C. MPEGJPEG
MPEGJPEG - D. DOC MPEG MPEGJPEG
MPEGMPEGJPEG
Answer: A
NEW QUESTION # 111
Given the content of the files:
Given the code fragment from the Test. java file:
What is the result?
- A. Have a nice day!
- B. Compilation fails at line 14.
- C. A MissingResourceException is thrown at run time.
- D. Hi!
Answer: B
NEW QUESTION # 112
Which statement is true about the single abstract method of the java.util.function.Predicate interface?
- A. It accepts an argument and produces a result of any data type.
- B. It accepts one argument and returns boolean.
- C. It accepts one argument and returns void.
- D. It accepts one argument and always produces a result of the same type as the argument.
Answer: B
Explanation:
References:
NEW QUESTION # 113
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. An exception is thrown at line n1.
- B. Travel time is 8 hours
- C. Travel time is 6 hours
- D. Travel time is 4 hours
Answer: D
NEW QUESTION # 114
Given that /green.txt and /colors/yellow.txt are accessible, and the code fragment:
Path source = Paths.get("/green.txt);
Path target = Paths.get("/colors/yellow.txt);
Files.move(source, target, StandardCopyOption.ATOMIC_MOVE);
Files.delete(source);
Which statement is true?
- A. The yellow.txt file content is replaced by the green.txt file content and an exception is thrown.
- B. The file green.txt is moved to the /colors directory.
- C. A FileAlreadyExistsException is thrown at runtime.
- D. The green.txt file content is replaced by the yellow.txt file content and the yellow.txt file is deleted.
Answer: C
NEW QUESTION # 115
Given the code fragment:
What is the result?
- A. Compilation fails.
- B. A DateTimeException is thrown at runtime.
- C. 2012-02-10
- D. 2012-02-11
Answer: B
NEW QUESTION # 116
Given:
Book.java:
public class Book {
private String read(String bname) { return "Read" + bname }
}
EBook.java:
public class EBook extends Book {
public class String read (String url) { return "View" + url }
}
Test.java:
public class Test {
public static void main (String[] args) {
Book b1 = new Book();
b1.read("Java Programing");
Book b2 = new EBook();
b2.read("http://ebook.com/ebook");
}
}
What is the result?
- A. Read Java Programming View http:/ ebook.com/ebook
- B. The EBook.java file fails to compile.
- C. The Test.java file fails to compile.
- D. Read Java Programming Read http:/ ebook.com/ebook
Answer: C
NEW QUESTION # 117
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 passWord exists
The Employee table 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. Compilation fails at line 15.
- C. The code prints the employee ID.
- D. The code prints Error.
Answer: A
NEW QUESTION # 118
Given the code fragment:
What is the result?
- A. 3 : 3 : 4
- B. 6 : 5 : 6
- C. 4 : 4 : 4
- D. 5 : 3 : 6
Answer: C
NEW QUESTION # 119
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. 20.0
30.0 - B. A compilation error occurs.
- C. 0
- D. A NumberFormatExceptionis thrown at run time.
Answer: A
NEW QUESTION # 120
Given the for loop construct:
for ( expr1 ; expr2 ; expr3 ) {
statement;
}
Which two statements are true?
- A. The expression expr3 must be present. It is evaluated after each iteration through the loop.
- B. The expression expr1 is optional. it initializes the loop and is evaluated once, as the loop begin.
- C. When expr2 evaluates to false, the loop terminates. It is evaluated only after each iteration through the loop.
- D. This is not the only valid for loop construct; there exits another form of for loop constructor.
Answer: B,C
Explanation:
The for statement have this forms:
for (init-stmt; condition; next-stmt) {
body
}
There are three clauses in the for statement.
The init-stmt statement is done before the loop is started, usually to initialize an iteration variable.
The condition expression is tested before each time the loop is done. The loop isn't executed if the boolean expression is false (the same as the while loop). The next-stmt statement is done after the body is executed. It typically increments an iteration variable.
NEW QUESTION # 121
Given the code fragment:
What is the result?
- A. A compilation error occurs.
- B. Val: Val: Val:
- C. Val:10 Val:20 Val:30
- D. Val:20 Val:40 Val:60
Answer: D
NEW QUESTION # 122
Given the content of /resourses/Message.properties:
welcome1="Good day!"
and given the code fragment:
Properties prop = new Properties ();
FileInputStream fis = new FileInputStream ("/resources/Message.properties"); prop.load(fis); System.out.println(prop.getProperty("welcome1")); System.out.println(prop.getProperty("welcome2", "Test"));//line n1 System.out.println(prop.getProperty("welcome3")); What is the result?
Good day!
- A. Test
followed by an Exceptionstack trace
Good day! - B. A compilation error occurs at line n1.
- C. followed by an Exceptionstack trace
Good day! - D. Test
null
Answer: D
NEW QUESTION # 123
Given:
and the code fragment:
Which definition of the ColorSorterclass sorts the blocks list?
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION # 124
Assume customers.txtis accessible and contains multiple lines.
Which code fragment prints the contents of the customers.txtfile?
Stream<String> stream = Files.find (Paths.get (“customers.txt”));
- A. stream.forEach( c) -> System.out.println(c));
Stream<Path> stream = Files.list (Paths.get (“customers.txt”)); - B. lines.forEach( c) -> System.out.println(c));
- C. stream.forEach((String c) -> System.out.println(c));
Stream<Path> stream = Files.find (Paths.get (“customers.txt”)); - D. stream.forEach( c) -> System.out.println(c));
Stream<String> lines = Files.lines (Paths.get (“customers.txt”));
Answer: C
NEW QUESTION # 125
Given the content of /resourses/Message.properties:
welcome1="Good day!"
and given the code fragment:
Properties prop = new Properties ();
FileInputStream fis = new FileInputStream ("/resources/Message.properties"); prop.load(fis);
System.out.println(prop.getProperty("welcome1"));
System.out.println(prop.getProperty("welcome2", "Test"));//line n1
System.out.println(prop.getProperty("welcome3"));
What is the result?
- A. Good day!
Test
followed by an Exceptionstack trace - B. Good day!
followed by an Exceptionstack trace - C. Good day!
Test
null - D. A compilation error occurs at line n1.
Answer: D
NEW QUESTION # 126
Given:
What is the result?
- A. 10 : 22 : 6
- B. 10 : 30 : 6
- C. 10 : 22 : 20
- D. 10 : 22 : 22
Answer: A
NEW QUESTION # 127
Given:
and the code fragment:
The threads t1 and t2 execute asynchronously and possibly prints ABCA or AACB.
You have been asked to modify the code to make the threads execute synchronously and prints ABC.
Which modification meets the requirement?
- A. Replace line n1 with:private synchronized int count = 0;
- B. Replace line n2 with:volatile int count = 0;
- C. start the threads t1 and t2 within a synchronized block.
- D. Replace line n2 with:public synchronized void run () {
Answer: C
NEW QUESTION # 128
......
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