What is the difference between begin() and cbegin() in vectors? - CPP Quiz

CPP - Quiz(MCQ)

What is the difference between begin() and cbegin() in vectors?

A)

both are same

B)

begin() returns returns first element cbegin() returns void

C)

begin() returns iterator to first element and cbegin() returns iterator to last element

D)

begin() returns an iterator to first element whereas cbegin() returns constant iterator to first element

Correct Answer : begin() returns an iterator to first element whereas cbegin() returns constant iterator to first element

Explanation : Both begin() and cbegin() are used to access the first element of the vector. The function begin() returns an iterator to first element whereas cbegin() returns a constant iterator to first element.

Recently Updated in CPP Questions

What is the signature of math in function using command line arguments?

A)

int main(int argc, char **argv);

B)

int main(int argc, char const **argv);

C)

int main(int argc, char const *argv[]);

D)

All of the above

Correct Answer : All of the above

Explanation : Any of the above signature can be used while using command line arguments in C++ programs

Which of the following gives the name of the program if the second parameter to the main fucntion is char **argv?

A)

argv[0]

B)

argv[1]

C)

argv[2]

D)

argv[3]

Correct Answer : argv[0]

Explanation : The first string in the list of command line arguments represents the name of the program which can be accessed by using argv[0].

What does the first parameter of the main function represent?

A)

List of command line arguments

B)

Stack of command line arguments

C)

Number of command line arguments

D)

Dictionary of command line arguments

Correct Answer : Number of command line arguments

Explanation : The first argument of the main() function represents the number of command line arguments that are passed.

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