
Análise de Código React Native
Quiz
•
Instructional Technology
•
University
•
Practice Problem
•
Medium
Angelo Casten
Used 1+ times
FREE Resource
Enhance your content in a minute
5 questions
Show all answers
1.
OPEN ENDED QUESTION
3 mins • 1 pt
O que acontece quando o usuário pressiona o botão? Além disso, descreva a estrutura geral da interface apresentada.
import React from 'react';
import { Text, View, Button } from 'react-native';
export default function App() {
return (
<View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
<Text>Bem-vindo ao meu app!</Text>
<Button title="Clique aqui" onPress={() => alert('Botão pressionado!')} />
</View>
);
}
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Explique a funcionalidade da variável 'contador' e como ela é alterada no aplicativo. O que aparece na tela após o botão ser pressionado 3 vezes?
import React, { useState } from 'react';
import { Text, View, Button } from 'react-native';
export default function App() {
const [contador, setContador] = useState(0);
return (
<View style={{ padding: 40 }}>
<Text>Contador: {contador}</Text>
<Button title="Aumentar" onPress={() => setContador(contador + 1)} />
</View>
);
}
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
Descreva como a estilização afeta a aparência da tela. O que acontece se removermos 'justifyContent: center' do container?
import React from 'react';
import { View, Text, StyleSheet } from 'react-native';
export default function App() {
return (
<View style={styles.container}>
<Text style={styles.titulo}>Meu Aplicativo</Text>
</View>
);
}
const styles = StyleSheet.create({
container: {
backgroundColor: 'lightblue',
flex: 1,
justifyContent: 'center',
alignItems: 'center',
},
titulo: {
fontSize: 24,
fontWeight: 'bold',
}
});
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Este código tem um erro. Qual é o erro e como pode ser corrigido?
import React from 'react';
import { View, Text } from 'react-native';
export default function App() {
return (
<View>
<Text>Olá mundo!</Text>
<TextInput placeholder="Digite algo" />
</View>
);
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Explique como a exibição de mensagens funciona no componente. O que acontece quando o botão é pressionado?
import React, { useState } from 'react';
import { View, Text, Button } from 'react-native';
export default function App() {
const [logado, setLogado] = useState(false);
return (
<View style={{ padding: 40 }}>
<Text>{logado ? "Bem-vindo!" : "Por favor, faça login."}</Text>
<Button title="Entrar" onPress={() => setLogado(true)} />
</View>
);
}
Evaluate responses using AI:
OFF
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