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Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is an array in Java?
💡 Hint: Think about how an array stores data.
Question 2
Easy
How do you declare an array in Java?
💡 Hint: Remember the syntax we discussed!
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: int[] arr = {10, 20, 30}; int sum = 0; for (int num : arr) { sum += num; } System.out.println(sum);?
- 60
- 30
- 20
💡 Hint: Add the values of the numbers in the array.
Question 2
True or False: The index of the first element in an array starts at 1.
- True
- False
💡 Hint: Remember how indexing works in programming.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a program that creates an array of your five favorite food items and then displays a message that combines all of them together.
💡 Hint: Remember how to use loops to go through each item of the array.
Question 2
Create an array of ten random numbers, sum them, and then find the average. Include error checks for ensuring all numbers are valid.
💡 Hint: Use a method to validate the numbers and another to calculate both sum and average.
Challenge and get performance evaluation