Assume the existence of an interface, CommDevice, with the following methods:
transmit: accepts two string parameters and returns nothing
receive: accepts two string parameters and returns a boolean
Define a class, Firewall, that implements the above interface, and has the following members:
• a string instance variable, permittedReceiver
• a string instance variable, buffer
• a constructor that accepts a string parameter that is used to initialize the
permittedReceiver variable
• an implementation of the transmit method that assigns the first parameter to
the destination instance variable and the second to the buffer variable. It also
send to System. out the message "Data scheduled for transmission to dest"
where dest is replaced by the actual value of the destination string.
• an implementation of the receiver method that checks if the first parameter is
equal to the permittedReceiver and if so it sets the buffer instance variable to
the second parameter and returns true; otherwise it sets the buffer to the
empty string, prints the message "Attempted breach of firewall by "
where is replaced by the method's first parameter, and returns false.

What engine component is shown in the above figure?

Consider the following function main: int main() { int alpha[20]; int beta[20]; int matrix[10][4]; . . } a. write the definition of the function inputarray that prompts the user to input 20 numbers and stores the numbers into alpha. b. write the definition of the function doublearray that initializes the elements of beta to two times the corresponding elements in alpha. make sure that you prevent the function from modifying the elements of alpha. c. write the definition of the function copyalphabeta that stores alpha into the first five rows of matrix and beta into the last five rows of matrix. make sure that you prevent the function from modifying the elements of alpha and beta. d. write the definition of the function printarray that prints any onedimensional array of type int. print 15 elements per line. e. write a c11 program that tests the function main and the functions discussed in parts a through d. (add additional functions, such as printing a two-dimensional array, as needed.)

Read this excerpt from helen keller’s autobiography, the story of my life. have you ever been at sea in a dense fog, when it seemed as if a tangible white darkness shut you in, and the great ship, tense and anxious, groped her way toward the shore with plummet and sounding-line, and you waited with beating heart for something to happen? i was like that ship before my education began, only i was without compass or sounding-line, and had no way of knowing how near the harbour was. "light! give me light! " was the wordless cry of my soul, and the light of love shone on me in that very hour. . the morning after my teacher came she led me into her room and gave me a doll. the little blind children at the perkins institution had sent it and laura bridgman had dressed it; but i did not know this until afterward. when i had played with it a little while, miss sullivan slowly spelled into my hand the word "d-o-l-l." i was at once interested in this finger play and tried to imitate it. when i finally succeeded in making the letters correctly i was flushed with childish pleasure and pride. running downstairs to my mother i held up my hand and made the letters for doll. i did not know that i was spelling a word or even that words existed; i was simply making my fingers go in monkey-like imitation. in the days that followed i learned to spell in this uncomprehending way a great many words, among them pin, hat, cup and a few verbs like sit, stand and walk. based on this excerpt, which words best describe helen keller?