C - Arrays - Discussion

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Q.

Which of the following correctly initializes an array arr to contain four elements each with value 0?

I int [] arr = {0, 0, 0, 0};
II int [] arr = new int [4];
III int [] arr = new int [4];
for (int i = 0; i < arr. length; i ++)
arr [i] = 0;

A. I only B. III only
C. II and III only D. I, II, and III

Answer: Option D
Explaination:

 


Segment l is an initializer list which is equivalent to int () arr = new int(4);

arr(0) = 0;
arr(1) = 0;
arr(2) = 0;
arr(3) = 0;
Segment II creates four interger, which by are initialized to 0. The for loop in segment III is therefore unnecessary. It is not, however, incorrect.


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