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21. 

Which of the following control structures is used in every program?
A. repetition
B. selection
C. sequence
D. switching
22. 

In the C language, a string is assigned to the
A. char type of variable
B. string type of variable
C. conversion specification %s
D. All of the above
23. 

Which of the following statements declares a one-dimensional Character array named item that consists of five elements?
A. char item[0 to 4] = "";
B. char item[0 to 5] = "";
C. char item[4] = "";
D. char item[5] = "";
E. string item[5] = ' ';
24. 

A derived class may also be called a
A. subclass
B. super class
C. parent class
D. derived class
25. 

The main() function is always
A. a called function
B. a calling function
C. recursive function
D. used at the end of the program
E. None of the above