### Question:
FloatVectorUtil { public static float magnitude(float[] vector) { float magnitude = 0; for (float value : vector) { magnitude += value * value; } return (float) Math.sqrt(magnitude); } private  FloatVectorUtil(); static float[] add(float[] vector1, float[] vector2); static float[] normalize(float[] vector); static float cosine(float[] vector1, float[] vector2); static float dot(float[] vector1, float[] vector2); static float magnitude(float[] vector); static float generalizedJaccard(float[] vector1, float[] vector2); static float[] scalar(float[] vector, float scalar);  }### Answer:
@Test public void testMagnitude() { assertEquals(Math.sqrt(2 * 2 + 5 * 5 + -8 * -8 + 2 * 2), FloatVectorUtil.magnitude(new float[] { 2, 5, -8, 2, 0 }), 0.0001); }