Which modifier should be used to define a constant member variable?
A. static
B. final
C. abstract
D. No modifier can be used
Explanation:
If a member variable is marked as final, it is a constant.
Correct Answer: B 29 of 60
Question: 30
Which one of the following is correct to declare a native method?
A. public native void test();
B. public native void test(){}
C. public void native test();
D. public native test(){}
Explanation:
A native method can not have a method body. And the keyword native can't be put in front of the return value of the method.
Correct Answer: A 30 of 60
Question: 31
Given the following definition of a class:
public class Test {
private float f = 1.0;
int m = 12;
static int n=1;
public static void main(String arg[]) {
Test t = new Test();
// some code...
}
}
Which of the following usage are legal?
A. t.f
B. this.n
C. Test.m
D. Test.n
Explanation:
The f and m are instance variables. They should be accessed through an object. The n is a class variable and it should be accessed through the class name.
Correct Answer: A,D 31 of 60
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