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NEW QUESTION 104
Given the definition of the Employee class:
and this code fragment:
What is the result?
- A. [sales:Ada, hr:Bob, sales:Bob, hr:Eva]
- B. [hr:Eva, hr:Bob, sales:Bob, sales:Ada]
- C. [hr:Bob, hr:Eva, sales:Ada, sales:Bob]
- D. [Ada:sales, Bob:sales, Bob:hr, Eva:hr]
Answer: A
NEW QUESTION 105
Given the code fragments:
and
What is the result?
- A. DogCatMouse
- B. [Dog, Cat, Mouse]
- C. A compilation error occurs.
- D. null
Answer: B
NEW QUESTION 106
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 -ea option?
- A. An AssertionError is thrown.
- B. 0
- C. A compilation error occurs.
- D. 1
Answer: A
NEW QUESTION 107
Given:
And given the code fragment:
- A. Compilation fails only at line n2.
- B. null 0 Auto
4W 150 Manual - C. Compilation fails at both line n1 and line n2.
- D. Compilation fails only at line n1.
- E. 4W 100 Auto
4W 150 Manual
Answer: A
NEW QUESTION 108
Given:
and the code fragment:
What is the result?
- A. A compilation error occurs because the try block is declared without a catch or finally block.
- B. 0
- C. A compilation error occurs at line n1.
- D. An exception is thrown at line n2.
Answer: C
NEW QUESTION 109
Which statement is true about java.time.Duration?
- A. It tracks time zones.
- B. It defines date-based values.
- C. It preserves daylight saving time.
- D. It defines time-based values.
Answer: D
Explanation:
http://tutorials.jenkov.com/java-date-time/duration.html#accessing-the-time-of-a-duration
NEW QUESTION 110
Given the code fragment:
BiFunction<Integer, Double, Integer> val = (t1, t2) -> t1 + t2; //line n1 System.out.println(val.apply(10, 10.5)); What is the result?
- A. 20.5
- B. A compilation error occurs at line n1.
- C. 0
- D. A compilation error occurs at line n2.
Answer: B
NEW QUESTION 111
Given the code fragment:
What is the result?
- A. 0 2 4 6
- B. 2 4
Compilation fails. - C. 0 2 4
Answer: C
NEW QUESTION 112
Given the code fragments:
and
Which two modifications enable to sort the elements of the emps list? (Choose two.)
- A. Replace line n1 withclass Person implements Comparator<Person>
- B. Replace line n1 withclass Person extends Comparator<Person>
- C. At line n2 insert:public int compareTo (Person p, Person p2) {return p1.name.compareTo (p2.name);}
- D. At line n2 insertpublic int compareTo (Person p) {return this.name.compareTo (p.name);}
- E. Replace line n1 withclass Person implements Comparable<Person>
- F. At line n2 insertpublic int compare (Person p1, Person p2) {return p1.name.compareTo (p2.name);}
Answer: D,E
NEW QUESTION 113
Given the code fragment:
public void recDelete (String dirName) throws IOException {
File [ ] listOfFiles = new File (dirName) .listFiles();
if (listOfFiles ! = null && listOfFiles.length >0) {
for (File aFile : listOfFiles) {
if (aFile.isDirectory ()) {
recDelete (aFile.getAbsolutePath ());
} else {
if (aFile.getName ().endsWith (".class"))
aFile.delete ();
}
}
}
}
Assume that Projectscontains subdirectories that contain .classfiles and is passed as an argument to the recDelete ()method when it is invoked.
What is the result?
- A. The method executes and does not make any changes to the Projectsdirectory.
- B. The method deletes all the .classfiles in the Projectsdirectory and its subdirectories.
- C. The method throws an IOException.
- D. The method deletes the .classfiles of the Projectsdirectory only.
Answer: D
NEW QUESTION 114
Given the code fragment:
Path file = Paths.get ("courses.txt");
// line n1
Assume the courses.txt is accessible.
Which code fragment can be inserted at line n1 to enable the code to print the content of the courses.txt file?
- A. List<String> fc = Files.list(file);
fc.stream().forEach (s - > System.out.println(s)); - B. Stream<String> fc = Files.readAllLines (file);
fc.forEach (s - > System.out.println(s)); - C. List<String> fc = readAllLines(file);
fc.stream().forEach (s - > System.out.println(s)); - D. Stream<String> fc = Files.lines (file);
fc.forEach (s - > System.out.println(s));
Answer: D
NEW QUESTION 115
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. Replace line n2 with:public synchronized void run () {
- D. start the threads t1 and t2 within a synchronized block.
Answer: D
NEW QUESTION 116
Given the definition of the Vehicle class:
Class Vehhicle {
int distance; //line n1
Vehicle (int x) {
this distance = x;
}
public void increSpeed(int time) { //line n2
int timeTravel = time; //line n3
class Car {
int value = 0;
public void speed () {
value = distance /timeTravel;
System.out.println ("Velocity with new speed"+value+"kmph");
}
}
new Car().speed();
}
}
and this code fragment:
Vehicle v = new Vehicle (100);
v.increSpeed(60);
What is the result?
- A. Velocity with new speed
- B. A compilation error occurs at line n3.
- C. A compilation error occurs at line n1.
- D. A compilation error occurs at line n2.
Answer: A
NEW QUESTION 117
Which statement is true about the DriverManager class?
- A. It returns an instance of Connection.
- B. It executes SQL statements against the database.
- C. it is written by different vendors for their specific database.
- D. It only queries metadata of the database.
Answer: A
Explanation:
Explanation
The DriverManager returns an instance of Doctrine\DBAL\Connection which is a wrapper around the underlying driver connection (which is often a PDO instance).
References:
NEW QUESTION 118
Given:
What is the result?
- A. -finally-
-catch- - B. -catch-
- C. -finally
- dostuff-
- catch- - D. -catch-
- finally-
- dostuff-
Answer: A
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION 119
Given the code fragments:
class ThreadRunner implements Runnable {
public void run () { System.out.print ("Runnable") ; }
}
class ThreadCaller implements Callable {
Public String call () throws Exception {return "Callable"; )
}
and
ExecutorService es = Executors.newCachedThreadPool ();
Runnable r1 = new ThreadRunner ();
Callable c1 = new ThreadCaller ();
// line n1
es.shutdown();
Which code fragment can be inserted at line n1to start r1and c1 threads?
Future<String> f1 = (Future<String>) es.submit (r1);
- A. Future<String> f1 = es.submit (c1);
- B. Future<String> f2 = (Future<String>) es.execute(c1);
es.submit(r1); - C. es.execute (c1);
es.execute (r1); - D. Future<String> f1 = es.execute (c1) ;
Future<String> f1 = (Future<String>) es.execute(r1);
Answer: A
NEW QUESTION 120
Given that these files exist and are accessible:
and given the code fragment:
Which code fragment can be inserted at line n1to enable the code to print only
/company/emp?
- A. Stream<Path> stream = Files.list (Paths.get ("/company/emp"));
- B. Stream<Path> stream = Files.list (Paths.get ("/company"));
- C. Stream<Path> stream = Files.walk (Paths.get ("/company"));
- D. Stream<Path> stream = Files.find(
Paths.get ("/company"), 1,
(p,b) -> b.isDirectory (), FileVisitOption.FOLLOW_LINKS);
Answer: D
NEW QUESTION 121
Given:
What is the result?
-catch-
- A. -finally-
- B. -catch-
-finally - C. -dostuff-
-catch- - D. -finally-
-dostuff-
-catch-
Answer: B
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION 122
......
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