Using C++ Language Write a program to implement the following: • Declare two C-strings str1 and str2 of appropriate sizes. • Use strcpy() to copy the string "Hello World." into str1 • Using a suitable message, read the user input into str2. The user may enter more than one word. • Determine and store the length of both char arrays using strlen() • Check if both char arrays are the same length using the stored lengths o If they are the same length, tell the user they are the same length o If they are not the same length, tell the user the strings are different and end the program using a return statement. • Compare both strings using strcmp to check if they are the same string. o If they are the same string, inform the user of this o If they are not the same string, inform the user of this o Note that you compare only if they are of the same length, hence the return statement in the earlier step.

Without using arrays, write a c++ program that continues reading an instructor marks untill he inputs 999. The program should display the minimum, maximum,and the average of his entered marks.

The following functions are all intended to check whether a string representing a dna sequence contains any characters that are not 'a','c','g','t', 'A', 'C', 'G', or 'T'. At least some of these functions are wrong. Which ones are correct? A) def valid_dna1(dna): for c in dna: if c in 'acgtACGT': return True else: return False B) def valid_dna3(dna): for c in dna: flag = c in 'acgtACGT' return flag C) def valid_dna4(dna): for c in dna: if not c in 'acgtACGT': return False return True -------------------------------------------------------------------------------------------------------------------------------------------------------- valid_dna1 only valid_dna4 only None of them. valid_dna1, and valid_dna4 only

you will develop a c++ program to find all the duplicate elements in a character array. Your program should ask the user to input 7 elements (of type char) and display all the duplicates. For instance, if the user enters d a b g a c b, your program should display: a b

Match the std::string constructor on right to its function on left. Source: https://cplusplus.com/reference/string/string/string/ E string() string (const string& str) string (const char* s) string (size_t n, char c) [Choose] [Choose ] constructs a copy of str. constructs an empty string, with a length of zero characters. copies the null-terminated character sequence (C-string) pointed by s. fills the string with n consecutive copies of character c. [Choose ]

Which of the following are true? O The C-library has many functions that are useful in manipulating strings. V If a and b are two different C-string variables, the value in a can be assigned the value in b with the following C-statement: a = b; %3D O The length of the char array holding the string must be at least one character longer than the string itself. O An array identifier cannot be used as a pointer. V The identifier, name, of a C-string is also a pointer to a char data type. The ending character in a C-string must be the newline character, '\n'. O The name of a 1-D array is a pointer to the data type of the array, while the name of a 2-D array is a pointer to a 1-D array of the data type.