Three approaches can be used for input and output. in the most basic manner. A system call is made by a user program, and the  Blank 1. Fill in the blank, read surrounding text. converts it to a procedure call to the relevant driver.

Describe the following input/output operations in assembly language:i: Input a character from the keyboard without echo.ii. Send a character to the monitor.

A system call is (A) the interface between a user program and the operating system. (B) executed in user mode. (C) the memory manager in a computer system. (D) used to perform only I/O operations. (E) used to perform only inter-process communication.

Which of the following is the best model to use to document the inputs to and outputs from a system?

Procedure Call:Purpose: Call a function or procedure.Example: result = add(a, b);Three-Address Code: param a, param b, result = call add

system call and system program in os