
Campi e metodi statici
Authored by Stefano Marcugini
Computers
University
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6 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Nella seguente classe, quale campo potrebbe essere definito statico?
public class Automobile{
public Color Colore;
public String Targa;
public int NumeroTotaleAutoPossedute; ...}
Colore
Targa
NumeroTotaleAutoPossedute
Tutti
Nessuno
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Nella seguente classe, quale metodo potrebbe essere definito statico?
public class Automobile{
public Color colore;
public void vernicia(Color c) {colore = c;}
public double costoBollo(double potenza)
{return potenza * 40;} }
vernicia
costoBollo
Tutti
Nessuno
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
La seguente classe è corretta?
public class Automobile{
public Color colore;
public static void vernicia(Color c) {colore = c;}
}
SI
NO
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Perché la seguente classe non è corretta?
public class Automobile{
public Color colore;
public static void vernicia(Color c) {colore = c;}
}
Non è possibile definire statico un metodo void
Non è possibile definire statico un metodo pubblico
Non è possibile definire statico un metodo con parametri
Non è possibile definire statico un metodo che si riferisce ad un campo di istanza
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
public class Automobile{
public static double costoBollo(double p)
{return p * 40;} }
Data la classe sopra, nel metodo main della classe Applicazione quali chiamate sono possibili?
1) double b = Automobile.costoBollo(10.0);
2) Automobile a = new Automobile();
double b = a.costoBollo(10.0);
solo la 1)
solo la 2)
Entrambe
Sono entrambe sbagliate
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
public class Automobile{
public double costoBollo(double p)
{return p * 40;} }
Data la classe sopra, nel metodo main della classe Applicazione quali chiamate sono possibili?
1) double b = Automobile.costoBollo(10.0);
2) Automobile a = new Automobile();
double b = a.costoBollo(10.0);
solo la 1)
solo la 2)
Entrambe
Sono entrambe sbagliate
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