Java Illuminated, 5th Edition

9.10 Exercises, Problems, and Projects

9.10.1 Multiple Choice Exercises

1.   1. What is/are the valid way(s) to declare a two-dimensional integer array named a? (Check all that apply.)

   • ❑ int [ ][ ] a;

   • ❑ int a [ ][ ];

   • ❑ array [ ] int a;

   • ❑ int array [ ] a;

2.   2. A two-dimensional array is an array of arrays.

   • ❑ true

   • ❑ false

3.   3. In a two-dimensional array, every row must have the same number of columns.

   • ❑ true

   • ❑ false

4.   4. What is the default value of the elements of a two-dimensional array of booleans after declaration and instantiation of the array?

   • ❑ true

   • ❑ false

   • ❑ undefined

5.   5. How do you access the element of array a located at row 2 and column 4?

   • ❑ a{2}{4}

   • ❑ a( 2,4 )

   • ❑ a[2][4]

   • ❑ a[4][2]

6.   6. How do you retrieve ...