Code block a.
Code block B.
Code block c.
Code block d.
Code block e.
第1题:
public class Threads3 implements Runnable { public void run() { System.out.print(”running”); } public static void main(String[] args) { Thread t = new Thread(new Threads3()); t.run(); t.run(); t.start(); } } What is the result?()
第2题:
public class Threads5 { public static void main (String[] args) { new Thread(new Runnable() { public void run() { System.out.print(”bar”); } }).start(); } } What is the result?()
第3题:
Which two code fragments will execute the method doStuff() in a separate thread?()
第4题:
class Work implements Runnable { Thread other; Work(Thread other) { this.other = other; } public void run() { try { other.join(); } catch (Exception e) { } System.out.print("after join "); } } class Launch { public static void main(String [] args) { new Thread(new Work(Thread.currentThread())).start(); System.out.print("after start "); } } 结果为:()
第5题:
Given that a static method doIt() in a class Work represents work to be done, what block of code will succeed in starting a new thread that will do the work? CODE BLOCK a: Runnable r = new Runnable() { public void run() { Work.doIt(); } }; Thread t = new Thread(r); t.start(); CODE BLOCK b: Thread t = new Thread() { public void start() { Work.doIt(); } }; t.start(); CODE BLOCK c: Runnable r = new Runnable() { public void run() { Work.doIt(); } }; r.start(); CODE BLOCK d: Thread t = new Thread(new Work()); t.start(); CODE BLOCK e: Runnable t = new Runnable() { public void run() { Work.doIt(); } }; t.run();
第6题:
You work as an application developer at Certkiller .com. You have been given the task of developing a Windows service application that regularly monitors other Windows services on the same computer. This Windows service application must also log any abnormal file system activity. You have added the following class to the Windows service application: public class EnumerateService : ServiceBase { public static EnumerateService () { this.ServiceName = "Enumerate Service"; this.CanStop = true; } protected override void OnStart (string[] args) { // Enumerate all services and initialize the FileSystemWatcher } protected override void OnStop () { // Stop the FileSystemWatcher and perform cleanup } public static void Main () { EnumerateService service = new EnumerateService(); } } You then create the installer for the Windows service application, and install the Windows service application. You have configured the Windows service Startup type to Automatic, and rebooted the system. You then test the new Windows service application, and find that it is not working.You need to ensure that the service is working properly. What should you do?()
第7题:
after join
after start
after join after start
after start after join
第8题:
Cat
Dog
Compilation fails.
The code runs with no output.
An exception is thrown at runtime.
第9题:
Override the OnBoot method instead of the OnStart method.
Replace the Main method code with the following code: EnumerateService service = new EnumerateService (); Service.Run ();
Override the OnLoad method instead of the OnStart method.
Replace the Main method code with the following code: EnumerateService service = new EnumerateService (); Run (service);
第10题:
0
1
2
3
第11题:
Compilation fails.
An exception is thrown at runtime.
The code executes normally and prints “bar”.
The code executes normally, but nothing prints.
第12题:
new Thread() {public void run() { doStuff(); }};
new Thread() {public void start() { doStuff(); }};
new Thread() {public void start() { doStuff(); }}.run();
new Thread() {public void run() { doStuff(); }}.start();
new Thread(new Runnable() {public void run() { doStuff(); }}).start();
第13题:
class MyThread extends Thread { public void run() { System.out.println(“AAA”); } public void run(Runnable r) { System.out.println(“BBB”); } public static void main(String[] args) { new Thread(new MyThread()).start(); } } What is the result?()
第14题:
Runnable r = new Runnable() { public void run() { System.out.print(”Cat”); } }; Threadt=new Thread(r) { public void run() { System.out.print(”Dog”); } }; t.start(); What is the result?()
第15题:
public class TestOne implements Runnable { public static void main (String[] args) throws Exception { Thread t = new Thread(new TestOne()); t.start(); System.out.print(”Started”); t.join(); System.out.print(”Complete”); } public void run() { for (int i= 0; i< 4; i++) { System.out.print(i); } } } What can be a result?()
第16题:
public class Threads4 { public static void main (String[] args) { new Threads4().go(); } public void go() { Runnable r = new Runnable() { public void run() { System.out.print(”foo”); } }; Thread t = new Thread(r); t.start(); t.start(); } } What is the result?()
第17题:
Which two code fragments will execute the method doStuff() in a separate thread?()
第18题:
Compilation fails.
An exception is thrown at runtime.
The code executes and prints “running”.
The code executes and prints “runningrunning”.
The code executes and prints “runningrunningrunning”.
第19题:
AAA
BBB
Compilation fails.
The code runs with no output.
第20题:
Compilation fails.
An exception is thrown at runtime.
The code executes and prints “StartedComplete”.
The code executes and prints “StartedComplete0123”.
The code executes and prints “Started0l23Complete”.
第21题:
Compilation fails.
An exception is thrown at runtime.
The code executes normally and prints „foo”.
The code executes normally, but nothing is printed.
第22题:
new Thread() { public void run() { doStuff(); } }
new Thread() { public void start() { doStuff(); } }
new Thread() { public void start() { doStuff(); } } .run();
new Thread() { public void run() { doStuff(); } } .start();
new Thread(new Runnable() { public void run() { doStuff(); } } ).run();
new Thread(new Runnable() { public void run() { doStuff(); } }).start();
第23题:
Since the method foo() does not catch the exception generated by the method baz(), it must declare the RuntimeException in its throws clause.
A try block cannot be followed by both a catch and a finally block.
An empty catch block is not allowed.
A catch block cannot follow a finally block.
A finally block must always follow one or more catch blocks.
第24题:
Code block a.
Code block B.
Code block c.
Code block d.
Code block e.