Questions on enum data type in java and answers
(1)
(1)
enum Barcode{
a,b,c,d,e;
}
public class EnumTest {
public static void main(String[] args) {
System.out.println(Barcode.b);
}
}
What will output when you compile and run the above java code?
(a)1
(b)2
(c)b
(d)Compiler error
Answer:(c)
(2)
enum Barcode{
a,b,c,d,e;
}
public class EnumTest {
public static void main(String[] args) {
Barcode bar=Barcode.c;
System.out.println(bar);
}
}
What will output when you compile and run the above java code?
(a)2
(b)3
(c)c
(d) Compiler error
Answer: (c)
(3)
enum Barcode{
a,b,c,d,e;
}
public class EnumTest {
public static void main(String[] args) {
Barcode bar=Barcode.c;
System.out.println(bar.ordinal());
}
}
What will output when you compile and run the above java code?
(a)ab
(b)2
(c)c
(d) Compiler error
Answer: (b)
(4)
enum Barcode{
a,b,c,d,e;
}
public class EnumTest {
public static void main(String[] args){
for(Barcode bar:Barcode.values())
System.out.print(bar+"");
}
}
What will output when you compile and run the above java code?
(a)1 2 3 4 5
(b)0 1 2 3 4
(c)a b c d e
(d)97 98 99 100 101
Answer: (c)
(5)
enum Color{
black,white,green,yellow;
}
public class EnumTest {
public static void main(String[] args){
for(Color bar: Color.values())
System.out.println(bar.ordinal());
}
}
What will output when you compile and run the above java code?
(a)1 2 3 4 5
(b)0 1 2 3 4
(c)a b c d e
(d)97 98 99 100 101
Answer: (b)
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