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1Z0-805 - Upgrade to Java SE 7 Programmer - Dump Information
Vendor | : | Oracle |
Exam Code | : | 1Z0-805 |
Exam Name | : | Upgrade to Java SE 7 Programmer |
Questions and Answers | : | 90 Q & A |
Updated On | : | December 20, 2017 |
PDF Download Mirror | : | 1Z0-805 Brain Dump |
Get Full Version | : | Pass4sure 1Z0-805 Full Version |
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The
Executors.newSingleThreadExecutor() method creates an Executor
that uses a single worker thread operating off an unbounded queue.
Reference:
java.util.concurrent.Executors
QUESTION: 83
Given the code fragment: public class App {
public static void main (String [] args) {
path
path = paths.get(“C\\educations\\institute\\student\\report.txt”);
system.out.printIn(“getName(0): %s”, path.getName(0));
system.out.prinIn(“subpath(0, 2): %s” path.subpath(0, 2));
}
}
What is the result?
- getName (0): C:\subpath(0, 2): C:\education\report.txt
- getName (0): C:\subpath(0, 2): education\institute
- getName(0): educationsubpath(0, 2: education\institute\student
- getName(0): education subpath(0, 2): education\institute
- getName(0): report.txt subpath (0, 2): institute\student
Answer: D
Explanation:
The
getName(int index) method returns a name element of this path as a Path
object. The subpath(int beginIndex, int endIndex) method returns
a relative Path that is a subsequence of the name elements of this
path.
Reference:
java.nio.file.Path
QUESTION: 84
Given this code fragment: try {
String
query = "SELECT * FROM Item"; Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(query); ResultSetMetaData rsmd =
rs.getMetaData(); int rowCount = rsmd.getRowCount();
System.out.println ("Processing: " + rowCount + " rows."); while (rs.next()) {
// Process each row
}
} catch (SQLException se) {
System.out.println("Error");
}
Assume that the SQL query returns records. What is the result?
- Compilation fails.
- The program prints Error
- An exception is thrown at runtime
- The statement at line 16 execute
Answer: A
Explanation:
There
is no GetRowCount method in java.sql.ResultSetMetaData. The following
line will not compile: int rowCount = rsmd.getRowCount();
Reference:
java.sql.ResultSetMetaData
QUESTION: 85
In the Java SE7 API, which method is most commonly used by factories to instantiate objects?
- new ()
- make ()
- create ()
- getObject ()
- getInstance ()
- createObject ()
Answer: E
Explanation:
For example: KeyFactory.getInstance, ObjectFactory. getObjectInstance.
QUESTION: 86
Which method or methods should you implement to create your own implementation of the java.nio.file.PathMatcher interface?
- matches(Path)
- matches(Path), fails(Path)
- matches(Path) , fails(Path), enable(boolean)
- matches(Path) , fails(Path) , setPreferred (String)
Answer: A
Explanation:
The
interface PathMatcher is an interface that is implemented by objects
that perform match operations on paths. The single method for this
interface ismatches: boolean matches(Path path) Tells if given path
matches this matcher's pattern. Parameters:
path - the path to match Returns: true if, and only if, the path matches this matcher's pattern.
Reference:
java.nio.file.PathMatcher
QUESTION: 87
Given:
public class MyGrades {
private
final List<Integer> myGrades = new ArrayList<Integer>();
private final ReadWriteLock rwlock = new ReentrantReadWriteLock();
public void addGrade(Integer grade) {
// acquire lock myGrades.add(grade);
// release lock
}
public void averageGrades() {
// acquire lock Line ** double sum = 0;
int i = 0;
for (i = 0; i < myGrades.size(); i++) { sum += myGrades.get(i);
}
// release lock Line *** System.out.println("The average is: " + sum/(i+1));
}
}
Which
pair’s statements should you insert at lines ** and lines ***
(respectively) to acquire and release the most appropriate lock?
- rwlock.readLock().acquire(); rwlock.readLock().release();
- rwlock.readLock().lock(); rwlock.readLock().unlock();
- rwlock.getLock().acquire(); rwlock.getLock().release();
- rwlock.getLock().lock(); rwlock.getLock().Unlock();
- relock.WriteLock().acquire(); rwlock.writeLock().release();
- rwlock.writeLock().lock(); rwlock.WriteLock().unlock();
Answer: B
Explanation:
We
need a read lock, not a write lock, we are just reading data, not
writing/updating data.To aquire and release the lock the method lock()
and unlock are used.
Reference:
Class ReentrantReadWriteLock
QUESTION: 88
Given:
public class StringApp {
public static void main(String[] args) {
String[] str="Java SE,java EE,Java ME,java FX".split(","); int count=0;
for(int i=0;i<str.length;i++) { switch(str[i]) {
case
"Java SE": count++; continue; case "Java EE": count++; break; case
"Java ME": count++; break; case "Java FX": count++; break;
}
}
System.out.println("Total match found="+count);
}
}
What is the result?
- 1
- 2
- 3
- 4
Answer: B
Explanation:
Java SE and Java ME will increase the count variable as it matches. java EE and java FX does not match.
QUESTION: 89
Which two file attribute views support reading or updating the owner of a file?
- AclFileAttributeView
- DosFileAttributeView
- FileOwnerAttributeView
- FileStoreAttributeView
- BasicFileAttributeView
Answer: A, C
Explanation:
A:
The AclFileAttributeView is a file attribute view that supports reading
or updating a file's Access Control Lists (ACL) or file owner
attributes. C: The FileOwnerAttributeView.setOwner(UserPrincipal owner)
method updates the file owner.
Reference: Interface AclFileAttributeView,Interface FileOwnerAttributeView
QUESTION: 90
Which two code blocks correctly initialize a Locale variable?
- Locale loc1 = "UK";
- Locale loc2 = Locale.get Instance ( "ru" );
- Locale loc3 = Locale.getLocaleFactory("RU");
- Locale loc4 = Locale.UK;
- Locale loc5 = new Locale("ru", "RU");
Answer: D, E
Reference:
The Java Tutorials,Creating a Locale
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