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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the size of the following array after declaration? int[] arr = new int[10];
💡 Hint: Recall that the size is specified during declaration.
Question 2
Easy
How do you access the third element of the array int[] arr = {1, 2, 3, 4, 5};?
💡 Hint: Consider what the index of the third element would be.
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 value of the first element in an array int[] arr = {10, 20, 30};?
- 10
- 20
- 30
💡 Hint: Think about what element is stored at the starting index.
Question 2
True or False: The size of an array can be changed after it is declared.
- True
- False
💡 Hint: Consider how arrays allocate memory at the time of declaration.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Implement a function in Java that takes an array and a value and returns the index of that value, or -1 if it's not found.
💡 Hint: Consider using a loop to check each element for a match.
Question 2
Given an array int[] arr = {1, 2, 3, 4, 5}, write code to reverse the array in-place.
💡 Hint: Think about swapping elements from the start with those from the end.
Challenge and get performance evaluation