OOPs INTERVIEW QUESTION & ANSWERS
| 46. |
What is the difference between Array and Arraylist? |
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An array is a collection of the same type. The size of the array is fixed in its declaration. A linked list is similar to an array but it doesn't have a limited size. |
| 47. |
What is Jagged Arrays? |
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A jagged array is an array whose elements are arrays. The elements of a jagged array can be of different dimensions and sizes. A jagged array is sometimes called an array-of-arrays. |
| 48. |
What is the difference between an Array and a List? |
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The main difference between an array and a list is how they internally store the data. whereas Array is collection of homogeneous elements. List is collection of heterogeneous elements. |
| 49. |
What is virtual function? |
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A virtual function is a member function that is declared within a base class and redefined by a derived class .To create a virtual function, the function declaration in the base class is preceded by the keyword virtual. |
| 50. |
What are the different ways a method can be overloaded? |
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A method can be overloaded :- By varying the numbers of parameters
- By using different data types for the parameters
- By using different sequence of the parameters.
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