Which of the following statement is false?
deques offer rapid insertions and deletions at front
or back and direct access to any element.
The container member function cbegin returns an
iterator that refers to the container’s
first element.
Associative containers are nonlinear data structures
that typically can locate elements
stored in the containers quickly.
multimaps offer one-to-many mapping with
duplicates allowed and rapid key-based
lookup.

Question

UpStudy AI · Accepted Answer

The false statement is:

- **"The container member function cbegin returns an iterator that refers to the container's first element."**

In C++ the member function

$$
\texttt{cbegin()}
$$

does indeed return an iterator that “points” to the container’s first element, but more precisely it returns a **const_iterator** rather than a regular (modifiable) iterator. (The term “iterator” by itself might be taken to mean a non‐const iterator, which can be used to modify the pointed-to value. In contrast, a const_iterator does not permit modification of the pointed-to element.)

All of the other statements are true:
- A **deque** supports rapid insertions and deletions at both the front and back, and also provides random (direct) access to its elements.
- **Associative containers** (like $$\texttt{set}$$, $$\texttt{map}$$, etc.) are nonlinear data structures that allow fast element lookup (usually in $$O(\log n)$$ time).
- A **multimap** permits one-to-many mapping, allows duplicate keys, and permits key-based lookups in logarithmic time.

Thus, the only misleading or false statement is the one about $$\texttt{cbegin()}$$ returning an (modifiable) iterator when it actually returns a const_iterator.
The statement "The container member function cbegin returns an iterator that refers to the container's first element" is false.

Solución de inteligencia artificial de Upstudy

Responder

Solución

Extra Insights

preguntas relacionadas

Latest Computer Technology Questions