C++ Structures and Pointers Quiz

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What is a characteristic of structures in C++?

Structures cannot contain functions.

All data members are private by default.

Structures can only hold variables of one data type.

All data members are public by default. (correct)

In what context are structure pointers particularly useful?

For serializing data to files.

For passing structures to functions. (correct)

For accessing global variables.

For creating static arrays.

Which operator is used to access data members of a structure through a pointer?

::

&

-> (correct)

.

What can a structure in C++ contain?

An instance of another structure. Signup and view all the answers

What must be done if dynamic memory is used for any of the members of a structure?

It must be freed before the program exits. Signup and view all the answers

What type of structures can be declared in C++?

Both global and local structures. Signup and view all the answers

Which of the following is NOT a feature of nested structures?

Nested structures must contain at least one member variable. Signup and view all the answers

What happens if you forget to free dynamic memory used in a structure's members?

It causes a memory leak. Signup and view all the answers

What is the return value of the functions like find_last_of() if no matches are found?

string::npos Signup and view all the answers

Which function is used to erase a part of a string and reduce its length?

erase() Signup and view all the answers

What should ideally be used when passing a string during a function call to avoid unnecessary copies?

Pass by reference Signup and view all the answers

What is the function 'begin()' used for in relation to STL containers?

To return the beginning position of the container Signup and view all the answers

How many overloads does the insert() member function have based on the C++ version?

More than six Signup and view all the answers

What is a primary advantage of using std::string over C-style strings?

std::string does not require null termination. Signup and view all the answers

Which member function can be used to add a character to the end of a std::string?

push_back() Signup and view all the answers

What happens if you attempt to access an out-of-bounds index in a std::string using the at(i) function?

It throws an exception. Signup and view all the answers

What does the find() member function of std::string return if the specified sequence is not found?

std::string::npos. Signup and view all the answers

How is memory allocated for the characters in std::string managed?

It is handled automatically by the std::string class. Signup and view all the answers

Which std::string function would you use to retrieve the last character of a string without removing it?

back() Signup and view all the answers

Which character does a C-style string require at the end to define its termination?

'\0' Signup and view all the answers

What is the function of find_first_of() in std::string?

To search for the first character that matches any specified characters. Signup and view all the answers