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Description
| SESSION | JULY 2026 |
| PROGRAM | BACHELOR OF COMPUTER APPLICATIONS (BCA) |
| SEMESTER | VI |
| COURSE CODE & NAME | DCA3201 MOBILE APPLICATION DEVELOPMENT |
Assignment Set 1
- Draw the android architecture diagram with functions of each layer.
(5+5 = 10 Marks)
Ans 1.
Android Architecture
Android is a layered system which allows applications to be separated from low level services and hardware. Every layer offers facilities to the layers above it. The main groups are depicted in the diagram of a simplified
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- a) How would you create an empty project in Android Studio? Enlist the major steps.
b) Describe about the function of .java and .xml files in an Android project?
(5+5 = 10 Marks)
Ans 2a.
Steps to Create an Empty Android Studio Project
Launch Android Studio and be sure that the necessary Android SDK is installed. On the welcome screen click on New Project. If another project is currently open, choose File, New, New Project. Select desired device category and blank activity template.
If the project is a traditional project with a java and xml layout, then choose Empty Views Activity if available. Empty Activity is the typical template that has been used to start a Jetpack Compose project using Kotlin
- Describe Dalvik Virtual Machine and Android Run Time (ART). (5+5 = 10 Marks)
Ans 3.
Purpose of Android Runtimes
Android applications are run in managed environments: Dalvik Virtual Machine and Android Runtime. They both run Dalvik Executable, or DEX, bytecode instead of plain old Java class files. Build tools are responsible for making a compiled version of the application code into the code that the Android runtime understands.
Dalvik Virtual Machine
Dalvik was created for devices that were running on a low memory and low processing. It uses a register based virtual
Assignment Set 2
- Explain the role of LoaderManager. LoaderCallbacks in managing Cursor Loaders and the significance of its methods in the Android Loader framework (5+5 = 10 Marks)
Ans 4.
Role of the Android Loader Framework
Android Loader framework was created for the purpose to load data asynchronously and reconnect to an activity or fragment. A CursorLoader makes a ContentResolver query on a background thread and returns a Cursor. This prevents a query to the provider from happening in the interface thread itself, which would be rather slow.
LoaderManager manages
- Discuss how Broadcast Receivers work in Android and provide an example scenario where they might be useful (5+5 = 10 Marks)
Ans 5.
Meaning of Broadcast Receivers
A Broadcast Receiver is an Android part that reacts to broadcast intents sent by both the framework as well as applications. An event such as a change of charging status or an application specific update is broadcasted. The receiver deals with the event without the sender having to call its class directly.
A broadcast Intent includes an
- Discuss the various CRUD operations available in SQLite database. Explain them with the help of suitable examples. (5+5 = 10 Marks)
Ans 6.
CRUD Operations in SQLite
CRUD is an acronym for Create, Read, Update and Delete. These operations are used to add records, retrieve information, change the stored values and remove unwanted rows. These can be done with SQLiteDatabase APIs in Android, and SQLiteOpenHelper can be used for creating the database as well as handling version changes.
The database has a table of student information. The table below contains a unique identifier, a name and marks. Normally, the