Programs that control the operation of the computer hardware is called O a. System Software O b. Application Software O c. Central Processing Unit O d. Software Which of the following is an output device? O a. Printer O b. Keyboard O c. Scanner O d. Microphone Which language consists of numbers (ultimately reduced to 1s and Os)? O a. High Level O b. Machine . O d. Assembly Which among the following is not true about secondary memory? a. It is also called external storage devices or persistent storage. b. It is volatile C. It retains data even if the computer is switched off. d. Can hold much more memory than RAM Which data type is used to initialize the variable k with value 25. a. int O b. char O c. float O d. string Which format specifier is used if a variable named grade is declared as data type of character? a. %d O b. %lf C. %c