Operating Systems 2015F: Assignment 1
Please submit your answers to the following on CULearn. This assignment is due before class on September 23, 2015.
Choose the *most* accurate definition for the following terms/concepts:
- system calls
- function calls
- library calls
- process
- fork
- execve
- file
- filesystem
- signal
- library
- kernel
- environment variable
- shell variable
- zombie process
Definitions:
- A system call that creates a new process by creating a logical copy of the current process.
- The part of the operating system that runs in supervisor mode on the CPU and has the code that is run for all interrupts
- A stream of bytes associated with a hierarchical name.
- The API used by a process to access outside resources (disk/user input/network)
- A variable that can only be accessed within the current shell.
- A variable that can be accessed within the current process and in child processes (unless filtered).
- A variable that can be accessed globally by all processes.
- A process that has terminated but its parent has not retrieved its return value.
- An indexed collection of object files that may be linked into a program.
- A system call that loads an executable into the current process and runs it (erasing the process's old code and data).
- A schedulable entity with its own CPU context that can share its memory with other schedulable entities.
- A type of inter-process communication that is also used in UNIX to manage processes.
- An invocation of code present inside of a process that was included when the program was compiled.
- A system call that creates a new process, loads an executable, and runs it in the new process.
- An invocation of code present inside of a process that was loaded into the process at runtime.
- A system call to get the return value of a process that has terminated.
- The main abstraction for running programs that gives each program its own memory and virtual CPU.
- A hierarchical collection of key/value pairs, where the values are streams of bytes of arbitrary length.
- A device for storing data.
- The first process that runs on a UNIX-like system.