Class C { public static void main(String[] args) { int[]a1[]=new int[3][3]; //3 int a2[4]={3,4,5,6}; //4 int a2[5]; //5 } } What is the result of attempting to compile and run the program ?

Line 3 (int[]a1[]=new int[3][3];) is valid Java syntax — using brackets in mixed pre/post-identifier positions to declare a 2D array is legal, if unusual style. Lines 4 and 5, however, both attempt to specify an array's size inside the declaration brackets (int a2[4] and int a2[5]), which is illegal in Java — array sizes can only be specified when using new, not in the type/variable declaration itself, so both lines fail to compile.

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