Which of the following is true about interfaces: A. Can not contain constants but can have variables. B. None of the items listed. C. All methods in an interface must be abstract. D. A class can only implement one interface. E. An interface can have only non abstract methods.

Write a program that prompts the user to input a string. the program then uses the function substr to remove all the vowels from the string. for example, if str = "there", then after removing all the vowels, str = "thr". after removing all the vowels, output the string. your program must contain a function to remove all the vowels and a function to determine whether a character is a vowel.

Which element will you include to present numerical on a slide? a: graph b: text c: flowchart d: shapes

What need most led to the creation of the advanced research projects agency network? darpa wanted scientists to be able to collaborate and share research easily. darpa wanted american and russian politicians to be able to communicate. darpa wanted astronauts to be able to contact nasa and the white house. darpa wanted factory owners to be able to coordinate supply chains.