Understanding Strings and Arrays

What is the process of combining more than one string together known as?

• Concatenation

• Separation

• Division

• Multiplication

What is the algorithm to concatenate two strings without using any inbuilt methods?

• CONCATENATE (STR1, STR2, STR3)

• JOIN (STR1, STR2)

• MERGE (STR1, STR2)

• LINK (STR1, STR2)

What is a multidimensional array?

• An array of arrays

• A single-dimensional array

• A string array

• An object array

How do you create a two-dimensional array in Java?

• data_type[1st dimension][2nd dimension][]..[Nth dimension] array_name = new data_type[size1][size2]....[sizeN];

• data_type[array_name][size];

• array_name[data_type][size];

• data_type[size][array_name];

What does a two-dimensional array represent?

• A table with rows and columns

• A single list of items

• A string of characters

• A collection of objects

What is the size of a 2D array specified by?

• rows and columns

• length and width

• height and depth

• size and capacity

How do you access an element in a two-dimensional array in Java?

• array_name[row_index][column_index];

• array_name[column_index];

• array_name[column_index][row_index];

• array_name[row_index];

What happens if you try to access an index outside the bounds of a 2D array?

• ArrayIndexOutOfBoundsException is thrown

• The program will crash

• It returns null

• It returns 0

How can you initialize a two-dimensional array with predefined values in Java?

• data_type[][] array_name = new data_type[2][2]{{value1, value2}, {value3, value4}};

• data_type array_name[][] = new data_type{{value1, value2}, {value3, value4}};

• data_type[][] array_name = new data_type[2][2];

• data_type[][] array_name = {{value1, value2}, {value3, value4}};

What is the primary purpose of a two-dimensional array?

• To represent a single value

• To store a single list of items

• To create a dynamic list

• To store data in a grid format