Practice - Arrays
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Practice Questions
Test your understanding with targeted questions
What is the declaration of an array in Java?
💡 Hint: Look at how we define the array’s type.
What index does the first element of an array have?
💡 Hint: Think about how we start counting in programming.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is an array?
💡 Hint: Think about the purpose of arrays.
True or False: The length of an array can change during program execution.
💡 Hint: Consider how arrays are defined.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
You have an integer array with the numbers {5, 10, 20, 30, 2}. Write a program that finds and returns the second largest number.
💡 Hint: Consider how you would eliminate the largest number to find the next largest.
Given a two-dimensional array representing a grid of values, write a method to calculate the sum of all values.
💡 Hint: You'll need two loops: one for rows and another for columns.
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Reference links
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