Oracle Java SE 7 Programmer II Exam 1Z0-804
Exam Number/Code : 1Z0-804
Exam Name : Java SE 7 Programmer II Exam
One year free update
Once failed,100% refund
Questions and Answers : 150Q&As
Update Time : 2013-3-10
Price : $79.00
Exam Number/Code : 1Z0-804
Exam Name : Java SE 7 Programmer II Exam
One year free update
Once failed,100% refund
Questions and Answers : 150Q&As
Update Time : 2013-3-10
Price : $79.00
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1Z0-804 Exam Java SE 7 Programmer II
Building Database Applications with JDBC
Define the layout of the JDBC API
Connect to a database by using a JDBC driver
Update and query a database
Customize the transaction behavior of JDBC and commit transactions
Use the JDBC 4.1 RowSetProvider, RowSetFactory, and RowSet interfaces
Building Database Applications with JDBC
Define the layout of the JDBC API
Connect to a database by using a JDBC driver
Update and query a database
Customize the transaction behavior of JDBC and commit transactions
Use the JDBC 4.1 RowSetProvider, RowSetFactory, and RowSet interfaces
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Question:1
Given:
import java.util.*;
public class AccessTest {
public static void main(String[] args) {
Thread t1 = new Thread(new WorkerThread());
Thread t2 = new Thread(new WorkerThread());
t1.start(); t2.start; // line1
}
}
class WorkPool {
static ArrayList<Integer> list = new ArrayList<>(); // line2
public static void addItem() { // line3
list.add(1); // Line4
}
}
class WorkerThread implements Runnable {
static Object bar = new Object ();
public void run() { //line5
for (int i=0; i<5000;i++) WorkPool.addItem(); // line6
}
}
Which of the four are valid modifications to synchronize access to the valid list between threads t1 and t2?
A. Replace line 1 with:
Synchronized (t2) (t1.start();) synchronized(t1) (t2.start();)
B. Replace Line 2 with:
static CopyWriteArrayList<Integer> list = new CopyWriteArrayList<>();
C. Replace line 3 with:
synchronized public static void addItem () {
D. Replace line 4 with:
synchronized (list) (list.add(1);)
E. Replace line 5 with:
Synchronized public void run () {
F. replace line 6 with:
Synchronized (this) {for (in i = 0, i<5000, i++) WorkPool.addItem(); }
G. Replace line 6 with:
synchronized (bar) {for (int i= 0; i<5000; i++) WorkPool.addItem(); }
Answer:F
Question:1
Given:
import java.util.*;
public class AccessTest {
public static void main(String[] args) {
Thread t1 = new Thread(new WorkerThread());
Thread t2 = new Thread(new WorkerThread());
t1.start(); t2.start; // line1
}
}
class WorkPool {
static ArrayList<Integer> list = new ArrayList<>(); // line2
public static void addItem() { // line3
list.add(1); // Line4
}
}
class WorkerThread implements Runnable {
static Object bar = new Object ();
public void run() { //line5
for (int i=0; i<5000;i++) WorkPool.addItem(); // line6
}
}
Which of the four are valid modifications to synchronize access to the valid list between threads t1 and t2?
A. Replace line 1 with:
Synchronized (t2) (t1.start();) synchronized(t1) (t2.start();)
B. Replace Line 2 with:
static CopyWriteArrayList<Integer> list = new CopyWriteArrayList<>();
C. Replace line 3 with:
synchronized public static void addItem () {
D. Replace line 4 with:
synchronized (list) (list.add(1);)
E. Replace line 5 with:
Synchronized public void run () {
F. replace line 6 with:
Synchronized (this) {for (in i = 0, i<5000, i++) WorkPool.addItem(); }
G. Replace line 6 with:
synchronized (bar) {for (int i= 0; i<5000; i++) WorkPool.addItem(); }
Answer:F
Question:2
Sam has designed an application. It segregates tasks that are critical and executed frequently from tasks that are
non critical and executed less frequently. He has prioritized these tasks based on their criticality and frequency of
execution. After close scrutiny, he finds that the tasks designed to be non critical are rarely getting executed.
From what kind of problem is the application suffering?
A. race condition
B. starvation
C. deadlock
D. livelock
Answer:C
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Sam has designed an application. It segregates tasks that are critical and executed frequently from tasks that are
non critical and executed less frequently. He has prioritized these tasks based on their criticality and frequency of
execution. After close scrutiny, he finds that the tasks designed to be non critical are rarely getting executed.
From what kind of problem is the application suffering?
A. race condition
B. starvation
C. deadlock
D. livelock
Answer:C
Test4actual offer best quality 70-341 dumps test papers and 70-342 VCE test engine.You can get our 100% guaranteed 70-336 exam questions & 70-337 dump to help you in passing the real exam.
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