### Question:
VectorUtil { public static double getVectorDotProduct(Vector v1, Vector v2) { double dotProduct = 0d; for (Integer key : v1.getVector().keySet()) { if (v2.getVector().containsKey(key)) { dotProduct += v1.getVector().get(key) * v2.getVector().get(key); } } return dotProduct; }  static double getVectorAbsValue(Vector vector); static double getVectorDotProduct(Vector v1, Vector v2); static void main(String[] args);  }### Answer:
@Test public void calculateSimScoreTest(){ Vector v1 = new Vector(); Vector v2 = new Vector(); double dotproduct = VectorUtil.getVectorDotProduct(v1, v2); System.out.println(" hello world >> " + dotproduct); }