This one should: Create a child process If it is the child process then Open FILENAME for reading and tell the process that that file its standard input. Tell the process that it should use the file descriptor for talking to the client as its standard output. Do this: char awkCmd[BUFFER_LEN]; snprintf(awkCmd, BUFFER_LEN,"{print $%d}",columnIndex); which composes the command to give to awk Run /usr/bin/awk with awkCmd as the command line argument If any of these fail then it should send STD_ERROR_MSG of length STD_ERROR_MSG_LEN to the client and do exit(EXIT_FAILURE) Meanwhile the parent should wait for the child process to finish.

Which of the following is true of operations within a spreadsheet program’s built-in functions? a. operations within parentheses, then multiplication and division, and then addition and subtraction are computed. b. operations within parentheses, then addition and subtraction, and then multiplication and division are computed. c. multiplication and division, then addition and subtraction, and then operations within parentheses are computed. d. addition and subtraction, then multiplication and division, and then operations within parentheses are computed

Which of the following calculates the total from the adjacent cell through the first nonnumeric cell by default, using the sum function in its formula? -average -autosum -counta -max

Write a new lc-3 trap subroutine (i. e. a subroutine that will be invoked via the trap instruction) that will receive a numeric digit entered at the keyboard (i. e. an ascii character), echo it to the screen, and return in r0 the corresponding numeric value: so if the user types the digit '7', the character '7' will appear on the screen, but the value returned in r0 will be b0000 0000 0000 0111 (#7) you may not use any trap calls in your code - you must implement the "polling" code that interrogates the keyboard status and data registers. ; getnum_tsr ; a subroutine for obtaining a numeric value ; given ascii numeric digit input to keyboard. ; the numeric digit is echoed to the console (e. g. '7' = b0000 0000 0011 0111), ; but the value returned in r0 is the actual numeric value ; corresponding to the digit (e. g. b0000 0000 0000 0111 =