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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a 2D array?
💡 Hint: Think about how data is organized in a table.
Question 2
Easy
How do you access the first element of a 2D array?
💡 Hint: Remember, indexing starts at zero!
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the output of the following code snippet where mat is initialized as {{1, 2}, {3, 4}}?
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
System.out.print(mat[i][j] + " ");
}
}
- 1 2 3 4
- 1 3 2 4
- 1 2 3 4
💡 Hint: Pay attention to how the elements are printed.
Question 2
True or False: A 2D array can be considered as an array in which each element is also an array.
- True
- False
💡 Hint: Think about the definition of a 2D array.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a program that checks if a given 2D array is symmetric (the same forwards and backwards).
💡 Hint: Think about how elements are mirrored in a symmetric matrix.
Question 2
Create a function that finds the maximum value in a 2D array and returns its position.
💡 Hint: Be methodical in checking each position as you search.
Challenge and get performance evaluation