Which of the following is true about arrays and ArrayLists in Java?Question 2Answera.Arrays are always faster than ArrayLists.b.Arrays can store both primitive and object types, while ArrayLists can only store object types.c.Arrays and ArrayLists have the same syntax for accessing and modifying elements.d.Arrays have a fixed size, while ArrayLists can dynamically resize.
Question
Which of the following is true about arrays and ArrayLists in Java?Question 2Answera.Arrays are always faster than ArrayLists.b.Arrays can store both primitive and object types, while ArrayLists can only store object types.c.Arrays and ArrayLists have the same syntax for accessing and modifying elements.d.Arrays have a fixed size, while ArrayLists can dynamically resize.
Solution
The correct answer is:
d. Arrays have a fixed size, while ArrayLists can dynamically resize.
Explanation:
a. It's not always true that arrays are faster than ArrayLists. The performance depends on the specific use case.
b. While it's true that arrays can store both primitive and object types, ArrayLists can also store primitive types through their wrapper classes (like Integer, Character, Boolean etc.).
c. The syntax for accessing and modifying elements is not the same for arrays and ArrayLists. For arrays, we use square brackets (like arr[index]), while for ArrayLists, we use the get and set methods (like arrayList.get(index) and arrayList.set(index, element)).
d. This is true. Once an array is created, its size is fixed. On the other hand, ArrayLists can dynamically resize, which means elements can be added or removed, and the ArrayList will adjust its size accordingly.
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