File Info
| Exam | Upgrade to Java SE 7 Programmer |
| Number | 1Z0-805 |
| File Name | Oracle.1Z0-805.PracticeTest.2024-06-05.89q.vcex |
| Size | 4 MB |
| Posted | Jun 05, 2024 |
| Download | Oracle.1Z0-805.PracticeTest.2024-06-05.89q.vcex |
How to open VCEX & EXAM Files?
Files with VCEX & EXAM extensions can be opened by ProfExam Simulator.
Coupon: MASTEREXAM
With discount: 20%
Demo Questions
Question 1
Which two file attribute views support reading or updating the owner of a file?
- AclFileAttributeView
- DosFileAttributeView
- FileOwnerAttributeView
- FileStoreAttributeView
- BasicFileAttributeView
Correct answer: AC
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 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 2
Given:
What is the result?
- 1
- 2
- 3
- 4
Correct answer: B
Explanation:
Java SE and Java ME will increase the count variable as it matches. java EE and java FX does not match. Java SE and Java ME will increase the count variable as it matches. java EE and java FX does not match.
Question 3
Given:
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();
Correct 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.Incorrect answers:A: No such methods aquire or release.E, F: We do not need writelock.C, D: No method getlock.Reference: Class ReentrantReadWriteLock 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.
Incorrect answers:
A: No such methods aquire or release.
E, F: We do not need writelock.
C, D: No method getlock.
Reference: Class ReentrantReadWriteLock
Question 4
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)
Correct 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 is matches:boolean matches(Path path)Tells if given path matches this matcher's pattern.Parameters:path – the path to matchReturns:true if, and only if, the path matches this matcher's pattern.Reference: java.nio.file.PathMatcher The interface PathMatcher is an interface that is implemented by objects that perform match operations on paths.
The single method for this interface is matches:
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 5
In the Java SE7 API, which method is most commonly used by factories to instantiate objects?
- new ()
- make ()
- create ()
- getObject ()
- getInstance ()
- createObject ()
Correct answer: E
Explanation:
For example: KeyFactory.getInstance, ObjectFactory. getObjectInstance. For example: KeyFactory.getInstance, ObjectFactory. getObjectInstance.
Question 6
Given this code fragment:
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
Correct 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 There is no GetRowCount method in java.sql.ResultSetMetaData.
The following line will not compile:
int rowCount = rsmd.getRowCount();
Reference: java.sql.ResultSetMetaData
Question 7
Which two methods are defined in the FileStore class print disk space information?
- getTotalSpace ()
- getFreeSpace ()
- getUsableSpace ()
- getTotalCapacity ()
- getUsed ()
Correct answer: AC
Explanation:
A: The getTotalSpace() method returns the size, in bytes, of the file store.C: The getUsableSpace() method returns the number of bytes available to this Java virtual machine on the file store.Reference: Class java.nio.file.FileStore A: The getTotalSpace() method returns the size, in bytes, of the file store.
C: The getUsableSpace() method returns the number of bytes available to this Java virtual machine on the file store.
Reference: Class java.nio.file.FileStore
Question 8
Given:
Which pair's statements should you insert at line ** and line *** (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();
- rwlock.WriteLock().acquire();rwlock.writeLock().release();
- rwlock.writeLock().lock();rwlock.WriteLock().unlock();
Correct 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.Incorrect answers:A: No such methods aquire or release.E, F: We do not need writelock.C, D: No method getlock.Reference: Class ReentrantReadWriteLock 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.
Incorrect answers:
A: No such methods aquire or release.
E, F: We do not need writelock.
C, D: No method getlock.
Reference: Class ReentrantReadWriteLock
Question 9
Given the code fragment:
What is the result if the report.txt file contains
Welcome to the world of Java?
- The file contains the first five characters.
- The file contains the first four characters.
- The contents of the file remain unchanged.
- A NonWritableChannelException is thrown at runtime.
Correct answer: C
Explanation:
The truncate line will not change the file since the file size is less than 30.Reference: Interface SeekableByteChannel The truncate line will not change the file since the file size is less than 30.
Reference: Interface SeekableByteChannel
Question 10
What is the minimum SQL standard that a JDBC API implementation must support?
- SQL-92
- SQL 99
- SQL-2003
- JDBC 4.0
Correct answer: A
Explanation:
JDBC sets minimum SQL conformance to the SQL92 entry level SQL standard. This gives guaranteed wide portability for applications designed to run on many platforms. JDBC sets minimum SQL conformance to the SQL92 entry level SQL standard. This gives guaranteed wide portability for applications designed to run on many platforms.
