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2016 Oct 1Z0-869 free exam questions

Q31. - (Topic 2) 

Given the MIDlet code: 

15.

 boolean main_called; 

16.

 public static void main(String args[]) { 

17.

 main_called = true; 

18.

 } 

19.

 public void startApp() { 

20.

 int a; 

21.

 if (true == main_called) { 

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 a = 1; 

23.

 } else { 

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 a = 5; 

25.

 } 

26.

 } 

What is the result? 

A. A compilation error occurs when compiling this source. 

B. An error occurs at compile time. 

C. The source compiles. The MIDlet is started and a = 1. 

D. The source compiles. The MIDlet is started and a = 5. 

E. The source compiles. The application management system will not load this MIDlet. 

Answer:


Q32. - (Topic 2) 

Which three statements are true regarding the handling of wireless connections? (Choose three.) 

A. Network connections should never be performed on a separate thread, so problems can be handled quickly. 

B. Performing network operations on the same thread used by the display is likely to block refreshes of the display until the network operations complete. 

C. The connection could unexpectedly terminate while processing the input or output streams. 

D. A network connection could interfere with other services on the device, such as the ability to receive phone calls or SMS on a phone. 

E. Devices can only support one HttpConnection at a time; therefore, network access from multiple threads must be serialized. 

Answer: B,C,D 


Q33. - (Topic 2) 

When using X.509 PKI, where must a MIDlet suite's security certificates be placed? 

A. in a user-defined subclass of SecurityInfo in the JAR's META-INF directory 

B. inlined in the JAR manifest, using a base64 encoding 

C. inlined in the JAD, using a base64 encoding 

D. in .cer files in the JAR's META-INF directory 

Answer:


Q34. - (Topic 2) 

A MIDP 2.0 developer is building a game using the MIDP game API that requires user control over the direction of a Sprite within a GameCanvas. The developer wants to keep performance high and reduce memory use. Which two fulfill the goals? (Choose two.) 

A. in the GameCanvas object, use actual key codes rather than mapped game action constants 

B. implement keyPressed(), keyReleased(), and keyRepeated() 

C. suppress key events for the GameCanvas object 

D. poll for the current state of user key input in a loop, using getKeyStates() 

Answer: C,D 


Q35. - (Topic 2) 

Which is true about CLDC support for accessing system property information? 

A. Full support for java.util.Properties is available within CLDC. 

B. CLDC supports a subset of java.util.Properties and also provides additional property information using System.getProperty(). 

C. CLDC supports a subset of java.util.Properties. 

D. Property information is available in CLDC using System.getProperty(). 

Answer:


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Q36. - (Topic 1) 

Which three are true? (Choose three.) 

A. A MIDlet suite consists of only one JAR file. 

B. Different MIDlet suites can share data with each other. 

C. A MIDlet suite can have more than one class that extends the MIDlet class. 

D. A MIDlet suite is an array of MIDlet objects. 

E. The names of MIDlet classes that belong to different MIDlet suites must be different. 

Answer: A,B,C 


Q37. - (Topic 1) 

How would a MIDlet that uses a GameCanvas efficiently update only a small region of the screen, from the data in the off-screen buffer? 

A. call flushGraphics(int, int, int, int) that specifies the region to be flushed 

B. call serviceRepaints() and set a clip region on the Graphics object in paint() 

C. Pixels that are NOT to be flushed should be made transparent. 

D. write extra code to coalesce the flushGraphics() calls over many loops into one call 

Answer:


Q38. - (Topic 2) 

Which method in Canvas is overridden in GameCanvas? 

A. flushGraphics() 

B. paint() 

C. getKeyStates() 

D. flushGraphics(int, int, int, int) 

E. getGraphics() 

Answer:


Q39. DRAG DROP - (Topic 1) 

Click the Task button. 

Place the appropriate platform label on the class name. If the class exists in both CLDC and J2SE, choose the "Exists in BOTH..." option, regardless of whether the package names are different. 

Answer: 


Q40. - (Topic 3) 

Which declaration is illegal? 

A. openRecordStore("Customer_Name_and_Address", true); 

B. openRecordStore("Salesperson_Projections_by_Month", "acme", "sales"); 

C. openRecordStore("High_Scores_Stored_by_City_and_Name", false); 

D. openRecordStore("Customer_Projections", true, RecordStore.AUTHMODE_ANY, true); 

Answer: