Vendor: Android. Exam Code: OA Exam Name: Android Application Engineer Certifications Basic. Version: Demo

Transcription

1 Vendor: Android Exam Code: OA0-002 Exam Name: Android Application Engineer Certifications Basic Version: Demo

2 Topic 1, Volume A QUESTION NO: 1 Which is the incorrect explanation of an Activity? A. If another Activity is instantiated when the Activity is executed, onpause() will be executed. B. When the Activity is displayed in the foreground, onresume() will be executed. C. When the Activity is displayed again, onrestart() will be executed instead of onstart(). D. When the Activity returns from an onpause(), it sometimes can execute from oncreate(). QUESTION NO: 2 Which of these is the incorrect explanation of the androiddebuggable attribute of the AndroidManifest.xm <application> tag? A. If not set, it will be handled as "false". B. It is necessary to set this to "true" in order to use Eclipse's breakpoint function. C. The android:debuggable setup value can be read by an application. D. When releasing the application, deleting android:debuggable is recommended. Answer: B QUESTION NO: 3 Which of these is the correct interface definition used to bind a Service? A. AIDL B. IDL C. KML D. XML Answer: A 2

3 QUESTION NO: 4 Which configuration file holds the permission to use GPS? A. Layout file B. Manifest file C. Source file D. Property file Answer: B QUESTION NO: 5 Which of these is the correct explanation of BroadcastReceiver? A. The process which BroadcastReceiver makes active will be protected so that it cannot be forcequit. B. BroadcastReceiver will only be assumed active when executing getreceive(). C. BroadcastReceiver notifies the source of optional processing results based on the broadcast contact(s). D. BroadcastReceiver displays a user interface. Answer: A QUESTION NO: 6 Which of these is the incorrect explanation of the MenuItem interface? A. The MenuItem instance will be returned by the Menu class add(...) method. B. MenuItem can decide the Intent issued when clicking menu components. C. MenuItem can display either an icon or text. D. MenuItem can set a checkbox. 3

4 QUESTION NO: 7 Which is the correct file name of the NinePatch image created from a PNG using draw9patch? (Assume the file name of the original graphic was sample.png.) A. sample-9.png B. sample_9.png C. sample.png D. sample.9.png QUESTION NO: 8 Which of these is not defined as a screen display state? A. Visible B. Foreground C. Background D. Non-visible QUESTION NO: 9 Which of these is the incorrect folder as a folder that is created automatically after completion of the Android Development Tools Plugin New Project Wizard? A. dat B. gen C. res D. src Answer: A 4

5 QUESTION NO: 10 Which of these is the correct explanation of an XML layout file? A. In order to display a Ul defined in the XML layout file "main.xml", call the setcontentview method of the Activity with the parameter string Bmain.xml". B. There is no distinction between implementation of the layout definition by code, or by XML layout file. C. In an Eclipse project using the ADT plugin, the XML layout file is found in the /res/layout directory. D. Layout information written in the XML layout file will be converted into code by the Android platform when the screen is displayed. QUESTION NO: 11 The DalvikVM core libraries are a subset of which of these? A. Java ME B. Java SE C. Java EE D. Doja Answer: B QUESTION NO: 12 When creating the following Android project, which is the correct combination of (1)~(3)to add to the AndroidManifest.xml? 5

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7 A. Option a B. Option b C. Option c D. Option d QUESTION NO: 13 Which language is not supported in the Android Scripting Environment (ASE)? A. Perl B. JScript C. Lua D. BeanShell Answer: B 7

8 QUESTION NO: 14 Which of these is the correct description of file access? A. Generally, files are handled as dedicated resources per each application. B. Files created by an application can be directly accessed by any application. C. The content of file created by application cannot be accessed by other application. D. In order to access a file, the open FileStream method is provided in the Context class Answer: A QUESTION NO: 15 The following code is a part of an Activity class to create a dialog. Which is the Activity class method used to display this dialog? A. void createdialog(); B. void createdialogfint id); C. void show(); D. void showdialog(int id); QUESTION NO: 16 Which of these is the correct method to persist SharedPreferences? A. XML file B. SQLite C. json file D. Java object Answer: A 8

9 QUESTION NO: 17 Which of these is the incorrect explanation of the Java Native Interface(JNI)? A. JNI does not provide garbage collection on the native side, outside the memory resources of the Java Virtual Machine. B. Even if native code is used with JNI, it does not necessarily mean an improvement in the application processing speed. C. A Java exception can be generated from a native method, but it cannot be caught on the Java side. D. Header files generated on the Java side are included and implemented in the native (C/C++) side source code. QUESTION NO: 18 Which of these is called after the end of each test method of ActivitylnstrumentationTestCase2, a class which provides the unit Activity function tests? A. runtest B. teardown C. setup D. setactivityintent Answer: B QUESTION NO: 19 Which is the correct explanation of ListView? A. It is necessary to use ListView as a set with ListActivity. B. There is a function in ListView which displays a message when there is no information to be displayed. 9

10 C. When displaying an array using an Adapter class in ListView, it is necessary to convert it into a Collection class. D. ListView has a function to display a list of uniquely defined Views other than TextView. QUESTION NO: 20 Which of these Activity class methods must be overridden when creating a Menu that is displayed when the device's Menu button is pressed? A. oncreatecontextmenu B. onmenuopened C. oncreateoptionsmenu D. openoptionsmenu QUESTION NO: 21 Which approval is necessary to execute Bluetooth actions such as connection requests, connection receipt, and data forwarding? A. BLUETOOTH B. BLUETOOTH_ADMIN C. ACCESS_WIFI_STATE D. ACCOUNT MANAGER Answer: A QUESTION NO: 22 Which class is used when a sensor is accessed? A. SensorEventListener 10

11 B. SensorEvent C. SensorManager D. Sensor QUESTION NO: 23 Which of these is the incorrect explanation of the Toast class? A. Toast is a simple class for display, and cannot be set with a custom XML-defined layout B. The display duration time of Toast can be chosen from 2 types, LENGTHJjDNG and LENGTH_SHORT. C. Toast is a class included in the android widget package. D. Since Toast automatically closes after display, a dismiss () method is not provided. Answer: A QUESTION NO: 24 Which ContentProvider does Android not provide as a standard? A. A telephone log B. A database C. A bookmark D. A contact list Answer: B QUESTION NO: 25 Which of these is the incorrect explanation of SQLite? A. There are 5 types of data type stored in column; Null, Integer, Real, Text, and Blob. B. There are restrictions on some functions of SQLite loaded on Android. 11

12 C. It has transaction administration function and it is designed so that the storage is locked after commencing transaction. D. SQLite is a database that saves data in a single file. Answer: B QUESTION NO: 26 Which of these is not recommended in the Android Developer's Guide as a method of creating an individual View? A. Create by extending the android.view.view class. B. Create by extending already existing View classes such as Button or TextView. C. Create by copying the source of an already existing View class such as Button or TextView. D. Create by combining multiple Views. QUESTION NO: 27 Which of these is the incorrect explanation regarding the private key when an application is published? A. RSA cannot be used as the encryption algorithm for key creation B. Can be created by using keytool C. The debug key created by the SDK tool cannot be used D. Can store several keys in 1 key store file Answer: A QUESTION NO: 28 Which of these is the incorrect method setup when playing a video using a MediaPlayer? A. setdatasource sets the path for the data you want to play. 12

13 B. setdisplay sets the SurfaceView object you want to associate. C. setaudiostreamtype sets the type, chosen from those defined in AudioManager. D. setlooping sets the player repeat to ON/OFF. Answer: B QUESTION NO: 29 When executing android.content.context.openfileoutput("sample.txt", 0), which path is the file stored in? A. /data/app/<package name>/files B. /data/data/<package name>/files C. /system/app/<package name>/files D. /system/data/<package name>/files Answer: B QUESTION NO: 30 Which is written in the red frame of the following figure, a manifest file, to show the version number? 13

14 A. android:version-'4" B. android:versioncode="4" C. android:versionname="4" D. android:minsdkversion-'4" QUESTION NO: 31 Which of these is the correct explanation of the Ul/Application Exerciser Monkey (Monkey tool)? A. It can execute tests covering all events. B. It can execute stress tests and sometimes discover new bugs. C. Even if an error is discovered, it cannot repeatedly reproduce the same operating state D. Since it reduces the interval between events as much as possible, it operates in a heavilyloaded state. Answer: B QUESTION NO: 32 Which of the following dialogs is displayed at the time of executing the given code? (Assume no problems in the rest of the application.) 14

15 A. Option a B. Option b C. Option c D. Option d QUESTION NO: 33 Which of these is the incorrect explanation of the Android SDK and AVD Manager? A. They are provided from version 1.6 of the SDK. Up to Version 1.5, there was an AVD Manager but it lacked SDK management functions. B. You can create and startup AVD, and on startup you can delete user data up to that point. C. The "android" command can be used if "<SDK install folder>/tools" is added to the command path. D. The development tools that can be downloaded from Android SDK and AVD Manager are SDK- 15

16 platform, NDK-platform, emulator images, and USB drivers for handsets. QUESTION NO: 34 Which is the correct explanation of the Foo.java source code? A. Since mapping will occur to C/C++, int must be declared as jint. B. String, which is a reference type, cannot be used in the native method C. Visibility cannot be declared as private in the native method. D. The compile will succeed without problems. QUESTION NO: 35 Which of these is the correct explanation regarding the following methods? (1 )android.content.context.sendbroadcast (2)android.content.Context.startActivity A. Both methods are defined by overloading. 16

17 B. Both methods throw an exception. C. Both methods are asynchronous. D. Both methods are able to broadcast an Intent. QUESTION NO: 36 Which of these is the incorrect role for an Intent? A. Start an Activity B. Start a BroadcastReceiver C. Start a ContentProvider D. Start a Service QUESTION NO: 37 Which is not included in the Android application framework? A. WindowManager B. NotificationManager C. DialerManager D. PackageManager QUESTION NO: 38 The emulator supports mounting disk image files instead of an actual SD card. Which is the correct creation method of this? A. mksdcard-l 2048 mysd.img B. mksdcard -create -I mysd 2048 mysd.img 17

18 C. mksdcard -create -I mysd 2GB mysd.img D. mksdcard-l mysd 2048MB mysd.img QUESTION NO: 39 Which is of these is the incorrect explanation of layoutopt? A. It is a tool used on the command line and does not have GUI. B. It helps optimize application layout and layout hierarchy. C. It operates on the layout file. D. It can be used as an SDK tool from revision 4 and later. QUESTION NO: 40 Which of these is the correct explanation of the Android Interface Description Language? A. It enables data exchange between different applications. B. You cannot use Java primitive types as method parameters. C. Multiple methods can be defined in one AIDL file. D. It provides an environment for executing script languages. QUESTION NO: 41 Which of these is the incorrect package which holds classes needed for Android network connections? A. java.net B. org.apache.http C. android.location 18

19 D. android.net QUESTION NO: 42 Which shows the correct Android architecture? A. (1)Linux Kernel (2)Application framework (3)Library (4)Android runtime (5)Application B. (1)Linux Kernel (2)Android runtime (3)Library(4)Application framework (5)Application C. (1)Android runtime (2)Linux Kernel (3)Library (4)Application framework (5)Application D. (1 )Linux Kernel (2) Library (3)Android runtime (4)Application framework (5)Application QUESTION NO: 43 The following code is a part of a program which sends a status bar notification. Which is the correct code to put into (1) so that it will automatically cancel the notification after it occurs? 19

20 A. notification.flags = Notification.FLAG_INSISTENT; B. notification.flags = Notification.FLAG_AUTO_CANCEL; C. notification.setflags(notification.flag_auto_cancel); D. notification.setflags(notification. FLAGJNSISTENT); Answer: B QUESTION NO: 44 Which of these is the incorrect explanation of ProgressDialog? A. ProgressDialog inherits from the AlertDialog class. B. ProgressDialog can be set as 2 types of style: STYLEJHORIZONTAL and STYLE_SPINNER. C. ProgressDialog is able to apply a custom XML-defined layout by using the setcontentview(...) method. D. ProgressDialog can be freely configured to use a Drawable class to display as its progress bar. QUESTION NO: 45 Which of these is the correct function of Traceview? A. Displays a graphical task execution log. B. Displays graphically a memory acquisition and release log C. Displays graphically the call stack. D. Displays graphically the Ul state hierarchy. Answer: A QUESTION NO: 46 Which is the required plugin to develop Android with Eclipse? A. ADT 20

21 B. AJDT C. CDT D. RDT Answer: A QUESTION NO: 47 Which is the tool that creates certificates for signing an application? A. adb B. etc 1 tool C. fastboot D. keytool QUESTION NO: 48 Which manifest file permission is necessary to read data from the standard installed address book? A. READ_ADDRESS_DATA B. READ_PHONE_STATE C. READ_OWNER_DATA D. READ CONTACTS QUESTION NO: 49 Which component cannot receive an Intent? A. Service B. Activity 21

22 C. ContentProvider D. BroadcastReceiver QUESTION NO: 50 Which function is not supported by the "android" command? A. The SDK Update function B. Functions to create and edit an Android Virtual Device (AVD) C. Startup function for Android SDK and the AVD Manager tool D. Functions to create and delete an Android project QUESTION NO: 51 Which is the permission added to the Android manifest file in order to access GPS? A. ACCESS_FINE_LOCATION B. ACCESS_COARSE_LOCATION C. ACCESS_CHECKIN_PROPERTIES D. ACCESS MOCK LOCATION Answer: A QUESTION NO: 52 Which of these is the correct precaution when publishing an application update to the Android Market? A. The package name must be the same, but the.apk may be signed with a different private key. B. The package name does not have to be the same and the.apk can be signed with a different private key. 22

23 C. The package name must be the same and the.apk must be signed with the same private key. D. The package name does not have to be the same, but the.apk must be signed with the same private key. QUESTION NO: 53 Which of these is the correct way to configure access permissions? A. Add a <uses-permission> tag as a child tag of the <manifest> tag in AndroidManifest.xml. B. Add a <permission> tag as a child tag of the <manifest> tag in AndroidManifest.xml. C. Add a <uses-permission> tag as a child tag of the <application> tag in AndroidManifest.xml. D. Add a <permission> tag as a child tag of the <application> tag in AndroidManifest.xml. Answer: A QUESTION NO: 54 Which of these is the incorrect explanation of the adb command? A. The "adb start-server" command starts the adb server. B. The "adb devices" command lists connected handsets and emulators. C. You can copy a file to the target with the "adb copy" command. D. You install an apk with the "adb install" command. QUESTION NO: 55 Which does not have a lifecycle? A. Service B. MediaPlayer C. ContentProvider 23

24 D. Activity QUESTION NO: 56 Which of these is the correct explanation of SQLite? A. It is an object database. B. It is client-server format. C. It is possible to create and access a database by using SQLOpenHelper. D. It can be accessed by other applications through ContentProvider. QUESTION NO: 57 When reading videos from a resource, which is the recommended Android storage location for video files? A. /res/anim B. /res/raw C. /res/movie D. /res/values Answer: B QUESTION NO: 58 Which of these is the correct processing necessary for data update notification at the time of creating an individual ContentProvider and using it? A. In the update method of the ContentProvider class, notify by calling the ContentResolver.setNotificationUri method. B. In the update method of ContentProvider class, notify by calling the Cursor.notifyChange 24

25 method. C. In the update method of ContentProvider class, notify by calling the ContentResolver.notifyChange method. D. In the update method of the ContentProvider class, notify by calling the Cursor.setNotificationUri method. QUESTION NO: 59 Which of these is the incorrect explanation of Traceview? A. In order to create a Tracefile, you must write methods specifying the starting and ending positions of the part to be profiled. B. Since Tracefiles are saved on SD cards, the developer must specify a file name. C. Traceview is one of the tools of the SDK, and can be used from the command line or DDMS. D. Since Traceview cannot use tracefiles as is, a development machine with adb must be used. Answer: B QUESTION NO: 60 Which of these is the incorrect description of the code executed when a Button widget is clicked? 25

26 A. Option a B. Option b C. Option c D. Option d 26

27 Answer: A QUESTION NO: 61 Which is the processing that cannot be executed by using the emulator during development? A. Displaying information of the heap and threads. B. Emulation of outgoing calls C. Ending a process D. Receiving QUESTION NO: 62 Which of these is the correct explanation of the Android license form? A. It is necessary to register with Android Market and pay a license fee in order to develop a paidfor application on Android. B. There is no special provision regarding application license operation on Android. C. If an application is developed using Android, it is not a licensing violation if the source code is not made public. D. Since Android uses libraries licensed in various ways such as GPL, BSD, and LGPL, applications developed under Android are subject to the severest license, GPL. QUESTION NO: 63 For playing an audio file, where does the Android Developer's Guide recommend placing the file? A. res/raw B. res/values C. data/data D. system/data 27

28 Answer: A QUESTION NO: 64 Which of these URI schemes is not supported by Android? A. android:// B. content:// C. D. market://search? Answer: A QUESTION NO: 65 Which function is not provided by the Android Development Tools Plugin? A. Creating an Android project B. Creating supporting resource files C. Executing an Android application D. Supporting creation of a View QUESTION NO: 66 The following program uses an Intent to open a Web page designated by a Web browser. Which is the correct code that goes into (1)? A. android.intent.view B. android.intent.action.view 28

29 C. android.intent.view D. androidjntent.action.view Answer: B QUESTION NO: 67 Which code acquires a MediaPlayer class instance? A. MediaPlayer.create(this, R.raw.music); B. newmediaplayer(this, R.raw.music); C. MediaPlayer.getSource(this, R.raw.music); D. MediaPlayer.newInstancefthis, R.raw.music), Answer: A QUESTION NO: 68 Which is the correct description of a string resource file? 29

30 A. Option a B. Option b C. Option c D. Option d QUESTION NO: 69 30