Given the code fragment: // line n1 num = new int[10]; Which code fragment can be inserted at line n1 to enable the code to compile?

Question

Options

• Anew int num[];
• Bint[] num;
• Cint[10] num;
• Dint num[10];

• A
  4% (1)
• B
  96% (26)

Explanation

Option B (int[] num;) is correct because Java requires a variable to be declared before it can be assigned a value - num = new int[10]; is an assignment statement, so num must already exist as an int[] type reference, which int[] num; provides.

Option A (new int num[]) is invalid syntax entirely - new is used for object instantiation, not variable declaration. Option C (int[10] num) is wrong because Java does not allow a size inside the brackets during declaration; the size is only specified during instantiation (the new side). Option D (int num[10]) is similarly invalid - while int num[] is legal C-style syntax in Java, placing a size (10) inside the brackets on the declaration side is never allowed.

Memory tip: Think of it as a two-step process - declare the type, then allocate the memory. The brackets in the declaration (int[] num) are always empty; the size only appears on the new side (new int[10]).

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