Google Updated Associate-Android-Developer Exam Questions and Answers by youssef

Data Access Objects are the main classes where you define your database interactions. They can include a variety of query methods.

The class marked with @Dao should either be an interface or an abstract class. At compile time, Room will

generate an implementation of this class when it is referenced by a Database.

An abstract @Dao class can optionally have a constructor that takes a Database as its only parameter.

It is recommended to have only one Dao class in your codebase for all tables.

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while (reader.readLine().also { line = it } != null) { builder.append(line)

}

val json = JSONObject(builder.toString())

return json

} catch (exception: IOException) {

exception.printStackTrace()

} catch (exception: JSONException) {

exception.printStackTrace()

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var line: JSONObject ? try {

while (reader.readJSONObject ().also { line = it } != null) {

builder.append(line)

}

val json = JSONObject(builder.toString())

return json

} catch (exception: IOException) {

exception.printStackTrace()

} catch (exception: JSONException) {

exception.printStackTrace()

}

var line: String? try {

while (reader.readLine().also { line = it } != null) { builder.append(line)

}

val json = JSONObject(builder.toString())

return json

} catch (exception: RuntimeException) {

exception.printStackTrace()

} catch (exception: ArrayIndexOutOfBoundsException) {

exception.printStackTrace()

}

onKey

onClick

onOptionsItemSelected