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Questions and Answers
What is the crucial difference between a built-in array and an ArrayList in Java?
What is the crucial difference between a built-in array and an ArrayList in Java?
- Adding or removing elements in an array requires creating a new array, while elements can be added or removed from an ArrayList directly. (correct)
- The size of an array can be modified, while the size of an ArrayList cannot be changed.
- An ArrayList can only store primitive data types, while a built-in array can store objects.
- An ArrayList can have a fixed size, while an array can dynamically resize.
Which method is used to add elements to an ArrayList in Java?
Which method is used to add elements to an ArrayList in Java?
- addToEnd()
- append()
- insert()
- add() (correct)
How do you access an element in an ArrayList?
How do you access an element in an ArrayList?
- get() method (correct)
- retrieve() method
- access() method
- find()
Which method is used to change an element in an ArrayList?
Which method is used to change an element in an ArrayList?
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What is the method to remove an item from an ArrayList?
What is the method to remove an item from an ArrayList?
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How do you find out the number of elements in an ArrayList?
How do you find out the number of elements in an ArrayList?
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What type must be used to store elements like int in an ArrayList?
What type must be used to store elements like int in an ArrayList?
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How would you clear all elements from an ArrayList?
How would you clear all elements from an ArrayList?
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When looping through an ArrayList, which method should you use to determine the number of iterations?
When looping through an ArrayList, which method should you use to determine the number of iterations?
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What is the correct way to iterate over all elements of an ArrayList using a loop in Java?
What is the correct way to iterate over all elements of an ArrayList using a loop in Java?
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