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Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the method charAt() do?
💡 Hint: Think about how you access elements in an array.
Question 2
Easy
How do you determine the length of a string?
💡 Hint: It's a method that gives you the number of characters.
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 does the length() method do in a string?
- Returns the first character
- Returns the number of characters
- Concatenates two strings
💡 Hint: It's a method that counts.
Question 2
True or false: The index of the first character in a string is 1.
- True
- False
💡 Hint: Check where indexing starts.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a Java program that takes a string input from the user and prints each character with its corresponding index.
💡 Hint: Use Scanner to get input and remember to build a proper for loop.
Question 2
How would you modify the program to skip vowels while printing the characters?
💡 Hint: Think about using conditional statements to filter out characters based on their properties.
Challenge and get performance evaluation