BCSC0006 - Quiz 1 - Arrays

What is the possible output of the following code?

String[] strings = new String[2];

System.out.println(strings);

• [null, null]

• [ , ]

• String@74a14482

• None of the above

How many lines does the following code output?

String[] days = new String[] { “sun”, ”mon”, ”tue”, ”wed”, ”thr”, ”fri”, ”sat”, ”sun”} ;

for(int i =1;i<=days.length ;i++)

System.out.println (days[i]);

• six

• seven

• The code does not compile

• The code compiles but throws an exception at runtime

How many dimensions does the array reference moreBools allow?

boolean[][] bools[], moreBools;

• one dimension

• two dimensions

• three dimensions

• none of the above

If an index value is less than 0 or greater than or equal to 'array name'.length in an array element access expression, an . . . . . . is thrown.

• ArrayOutOfBoundsException

• ArraysIndexOutOfBoundsException

• ArrayIndexOutOfBoundsException

• ArrayIndexIsOutOfBoundsException

To declare a one-dimensional array, you will use this general form

• type[] array-name = new [size];

• type[size] array-name = new type[];

• type[] array-name = new type[size];

• type[] array-name = type[size];

Which of these array declaration statements are not legal?

• int[ ][ ] i = { { 1, 2 }, { 1 }, {}, { 1, 2, 3 } };

• int[ ] x = new int[2] {1, 2};

• int[ ][ ] x = new int[ ][ ] { {1, 2, 3}, {4, 5, 6} };

• int[ ][ ] x = { { 1, 2 }, new int[ 2 ] };

Which of these operators is used to allocate memory to array variables in Java?

• malloc

• alloc

• new

• new malloc

Which of these is necessary to specify at time of array initialization?

• row

• column

• both row and column

• none of the above

When you pass an array to a method, the method receives _____________________.

• A copy of the array.

• A copy of the first element.

• The reference of the array.

• The length of the array.

The i th element in the array has an index______________

• i

• i - 1

• i + 1

• none of the above