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11 April, 11:39

The code segment below is intended to randomly print one of the values 2, 4, 6, or 8 with equal probability.

int val = / * missing code * /;

val * = 2;

System. out. print (val);

Which of the following can be used to replace / * missing code * / so that the code segment works as intended?

a. Math. random () * 4 + 1

b. Math. random () * 8

c. (int) (Math. random () * 4)

d. (int) (Math. random () * 4 + 1)

e. (int) (Math. random () * 8 + 1)

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Answers (1)
  1. 11 April, 11:49
    0
    D. (int) (Math. random () * 4 + 1)

    Explanation:

    The first two options (A and B) will give a compiler error incompactible types since the Math. random () functions returns a double and val has been declared as an int. To overcome this, a type casting to integer is carried out. Option D (int) (Math. random () * 4 + 1) will return a value after been casted to an int of 1,2,3,4 which when this line val * = 2; is executed gives the expected output of 2,4,6 or 8.
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