Examination hints

Figure 615. Personal examination cheat sheets Slide presentation

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  • Upload your cheat sheet here

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Figure 616. Unit tests in examinations Slide presentation

  • Task definitions by Javadoc™.

  • Corresponding Unit tests.

  • Automated evaluation scoring your achievements.

  • Individual weights reflecting a test's significance.


Figure 617. Example interface definition Slide presentation 
/**
* Finde das n-te ungerade Element einer Wertefolge.
* 
* <p>Beispiel: Im Array {3, 2, 0, 1, 4} ist der Wert «1» an der Index-
*   position «3» das zweite ungerade Element.</p>
* 
* @param werte Die zu durchsuchenden Werte.
* @param n Die gewünschte Position, Start bei 1.
* 
* @return Den Index des n-ten ungeraden Wertes falls es mindestens n
* ungerade Werte gibt, ...
*/
static public int getNtesUngeradesElement(final int[] werte, final int n){     
    return 12345; // TODO: Implementiere mich korrekt!
}

Figure 618. Corresponding test Slide presentation 
@Test
@Marking(points=1) /* 1 point if test passes */
public void test_400() {
  Assert.assertEquals(
    2, /* Expected result */
    Helper.getNtesUngeradesElement(new int[]{-4,  6,  1, -2,   8}, 1));
}

Figure 619. Don't cheat! Slide presentation
Unit Tests Your solution 
assertFalse(isPrime(1));
assertTrue (isPrime(2));
assertTrue (isPrime(3));
assertFalse(isPrime(4));
assertTrue (isPrime(5));
assertFalse(isPrime(6));
assertTrue (isPrime(7));
assertFalse(isPrime(8));
assertFalse(isPrime(9));
assertFalse(isPrime(10));
 
... boolean isPrime(final int p) {
  switch (p) {
    case 2:
    case 3:
    case 5:
    case 7:
      return true;
    default:
      return false;    }

Will be treated as an attempt at deception / Täuschungsversuch.


Figure 620. Unit tests strategy in examinations Slide presentation

  • Unit testing is relentless: You are no longer at high school where a result having “just” a wrong sign used to matter next to nothing.

  • Focus on completing units of work rather than “nearly” finishing a large number of tasks.

  • Watching a test fail just happens. Learn to systematically fix bugs:

    1. Use your IDE's debugger. Practise debugging Junit tests individually addressing failures one by one.

    2. Insert log statements using log4j.


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