ProgramModerate2 marks
(a) Write the Java statement to initialise the first 6 odd numbers in a 3 x 2 array. (b) What is the result of x[0][1] + x[2][1] of the above array?
Topic: Two-dimensional arrays
Previous-year question practice database
Answer
Exam answer
(a) int x[][] = {{1, 3}, {5, 7}, {9, 11}}; (b) 14
Explanation
(a) A 3 x 2 array has 3 rows and 2 columns, so the initialiser holds three inner braces of two values each. The first six odd numbers are 1, 3, 5, 7, 9, 11, filled row by row. (b) Read each subscript as [row][column]: x[0][1] is row 0, column 1 = 3 x[2][1] is row 2, column 1 = 11 so the sum is 3 + 11 = 14. Note that the question names the array x in part (b) while part (a) asks you to declare it — use the name x so the two parts agree.
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