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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the declaration of an array in Java?
💡 Hint: Look at how we define the array’s type.
Question 2
Easy
What index does the first element of an array have?
💡 Hint: Think about how we start counting in programming.
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 an array?
- A method of storage for random data types.
- A collection of similar data types.
- A single value stored in variable.
💡 Hint: Think about the purpose of arrays.
Question 2
True or False: The length of an array can change during program execution.
- True
- False
💡 Hint: Consider how arrays are defined.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
Question 2
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.
Challenge and get performance evaluation