Which data structure can change its size dynamically as items are added or removed?

Which data structure can change its size dynamically as items are added or removed?

• A. Array
• B. Vector
• C. Char
• D. String

Answer: (B)

A vector is a dynamic data structure that automatically adjusts its size when items are added or removed. This means that unlike an array, which has a fixed size determined at its creation, a vector can grow or shrink as needed. When additional elements are added, the vector handles memory allocation to accommodate the new items, which allows for flexible and efficient management of data. The other options do not possess this dynamic resizing capability. Arrays, for example, are static and require pre-defined sizes at creation, while char represents a single character and does not have any connection to data structure size. Strings, while they can grow in certain programming contexts, are often backed by a fixed-size array, making their resizing behavior dependent on the specific implementation rather than inherent to the string itself. This emphasis on the ability to dynamically adjust makes vectors particularly useful in situations where the amount of data being handled cannot be predetermined.

A vector is a dynamic data structure that automatically adjusts its size when items are added or removed. This means that unlike an array, which has a fixed size determined at its creation, a vector can grow or shrink as needed. When additional elements are added, the vector handles memory allocation to accommodate the new items, which allows for flexible and efficient management of data.

The other options do not possess this dynamic resizing capability. Arrays, for example, are static and require pre-defined sizes at creation, while char represents a single character and does not have any connection to data structure size. Strings, while they can grow in certain programming contexts, are often backed by a fixed-size array, making their resizing behavior dependent on the specific implementation rather than inherent to the string itself. This emphasis on the ability to dynamically adjust makes vectors particularly useful in situations where the amount of data being handled cannot be predetermined.