Practice Quiz Lesson 9

1. 1This code will run:
   
   int [][] numbers = new int numbers[3][];

   1. ATrue
   2. BFalse
2. 2What is the 2D array location for the following?
   
   int [][] numbers = {{1,2,3,4},{8,7,6}};
   
   What is the 'array address' of 7?

   1. A[0][1]
   2. B[1][1]
   3. C[1][2]
   4. D[0][2]
3. 3Can 2D Arrays vary in length?

   1. AVerdadero
   2. BFalso
4. 4What is the correct formula for a for loop?

   1. Afor( <statement>; <initialization>; <condition>;)
      <update>;
   2. Bfor( <condition>; <initialization>; <update>;)
      <statement>;
   3. Cfor( <initialization>; <condition>; <statement>;)
      <update>;
   4. Dfor( <initialization>; <condition>; <update>;)
      <statement>;
5. 5What would print out?
   
   String [][] names = new String {{"Gary", "Albert", "Athena"}, {"Ashley", "Po Ming", "Kate", "Pedram"}};
   
   System.out.println(names[1][2]);

   1. AAlbert
   2. BAthena
   3. CPo Ming
   4. DKate
6. 6In Java, collections...

   1. Acannot vary in size
   2. Bcan only contain any reference types
   3. Care sets, lists and maps
   4. Dall of the above
7. 7ArrayLists are Arrays

   1. ATrue
   2. BFalse
8. 8what is the correct for-each loop?

   1. Afor(int i = 0 ; i < numbers.length ; i++)
      {
      System.out.println(i)
      }
   2. Bfor( n Numbers : numbers)
      {
      System.out.rpintln(n)
      }
   3. Cfor(int i = 5 ; 5 == 5 ; i++)
      {
      System.out.println(i)
      }
   4. Dfor(Numbers n : numbers)
      {
      System.out.println(n)
      }
9. 9This creates an anonymous object in memory:
   Book book1 = new Book();
   library.add(book1);

   1. AVerdadero
   2. BFalso
10. 10Arrays are measured with what operator?

    1. A.length()
    2. B.length
    3. C.size()
    4. D.size

Descripción

Test sobre Practice Quiz Lesson 9, creado por Athena Kozak el 22/03/2019.

Autor

Athena Kozak

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