Free Printable Quiz Android 1

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Quiz Android 1

Total questions: 15

Worksheet time: 15mins

Name

Class

Date

How to share view model between fragment-fragment, activity-fragments?

Init view model using "by viewmodels()" function of fragment-ktx

Init view model using "by activityViewModels()"" function of fragment-ktx

Init view mode by using "ViewModelProvider(fragment context).get"

Init view model by using "ViewModelProvider(activity context).get"

What is different between DataBinding and FindViewById method?

DataBinding generate binding class at runtime and findViewById run at compile time.

DataBinding generate binding class at compile time and findViewById run at runtime.

DataBinding and findViewById run at compile time.

DataBinding and findViewById run at runtime

What happens when you use the API 15 features but set compile Sdk Version to 14?

Get error when run application

Get error when compilation

All of above

No errors

Which sentences is wrong when say about lateinit and lazy keyword

lateinit if for non-null properties, it means no need to check null for it.

lateinit can only be used with var (mutable) properties whereas lazy can only be used for val (immutable) properties.

lateinit and lazy can work with primitive type.

While using Singleton Pattern (Object Declaration in Kotlin) we should use lazy, as it will be initialized upon first use.

How many threads can be executed at a time?

Only one thread

Only main (main() method) thread

Multiple threads

Two threads

Android uses “Intents” to communicate and send data between different components which make it vulnerable to malicious attacks. Which of the following choices are component level Permissions to protect this type of communication? (Multi select)

Activity

Service

Content Provider

Widgets

Android SQLite database files are stored under the ………………………………… directory

/data/database/<application-path>/databases/

/data/data/<application-path>/databases/

/data/files/<application-path>/databases/

/data/mydata/<application-path>/databases/

What is contained within the manifest xml file?

The permissions the app requires

The list of strings used in the app

The source code

All above choices

AIDL stands for ….

Android Interface Definition Language

Android Intermediate Definition Language

Android Interface Description Language

Android Internal Definition Language

10.

SQLite is an Open Source Database system embedded into every Android device.

True

False

11.

Which of the following classes has methods to create, delete, execute SQLite commands and perform other common SQLite database management tasks?

SQLiteOpenHelper

SQLiteDatabase

Cursor

Progressbar

12.

Which does definition fit best with the image below?

Static View

Class Diagram

SAD

SDD

13.

What type of relationship is represented by Shape class and Square?

Realization

Generalization

Aggregation

Dependency

14.

A flowchart needs to represent the a situation where the user is asked to enter 20 marks in succession. This is an example of which of the algorithm constructs?

Decision

Loop

Sequence

All of the above

15.

Which is type of Singleton allows instance is loaded into memory when calling method get Instance() ?

Double Check Locking

Thread Safe

Bill Pugh

Lazy Initialization

Reset

Quiz Android 1

Total questions: 15

Worksheet time: 15mins

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