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What is the role of the OS? To manage a computer's hardware Which OS service provides functions that are helpful to the user? Program execution Which OS service provides functions that are helpful to the user? Program execution Which system call is used for device manipulation? ReadConsole() Which system calls can be grouped under the

What is the role of the OS? a) To build the bootstrap program b) To write to memory c) To develop the kernel d) To manage a computer's hardware d) To manage a computer's hardware Which OS service provides functions that are helpful to the user? a) Resource allocation b) Program execution c) System calls d) Accounting b) Program execution Which system call is used for device manipulation? a) ReadConsole() b) Sleep() c) umas() d) CreateFileMapping() e) chmod() a) ReadConsole() Wh...

What is a valid process state? Waiting What are two valid components of a process control block (PCB) The process counter; The process state What is the difference between kernel and user threads? Kernel threads are directly managed by the operating system, whereas user threads are managed without kernel support. Which advantage does short-term scheduling have compared with long-term scheduling? It takes less time to select a process to execute next. What is considered stable when the ave...

goals of protection ensure that each object is accessed correctly and only by those processes that are allowed to do so. guiding principle of protection - Programs, users and systems should be given just enough privileges to perform their tasks - principle of least privilege access rights where rights-set is a subset of all valid operations that can be performed on the object domain set of access-rights system has two domains user

Network Attached Storage (NAS) A storage made available over a network rather than over a local connection (such as a bus) - NFS and CIFS are common protocols - Implemented via remote procedure calls (RPCs) - SCSI protocol uses IP network to carry the SCSI protocol Socket A connection point via which an OS communicates with a device PCI bus The common system bus connecting the process-memory subsystem to fast devices Interrupt The hardware mechanism that enables a device to notify the CPU...

Magnetic disks What is the most common secondary storage? Transfer rate The rate at which data flow between drive and computer Positioning time (random-access time) Time to move disk arm to desired cylinder (seek time) and time for desired sector to rotate under the disk head (rotational latency) Head crash Results from disk head making contact with the disk surface (it's bad) EIDE, ATA, SATA, USB, Fiber Channel, SCSI, SAS, Firewire What are examples of I/O busses? Host controller Uses ...

Temporary data such as function parameters, return addresses, and local variables. What does a stack contain? 1. The parent continues to execute concurrently with its children. 2. The parent waits until some or all of its children have terminated. 3. The child process is a duplicate of the parent process (it has the same program and data as the parent). 4. The child process has a new program loaded into it. When a parent creates a child process what are the possibilities? Context Switch ...

OS A program that manages the computers hardware an provides the environment in which programs are executed - its a resource allocator and control program CPU The processor that performs the computations I/O devices Items such as the terminal, disks, video board, printer, network card key are all considered one of these Main Memory This contains data and programs used by the CPU System bus This is the communication medium between CPU, memory and peripherals kernel the one program running...

Program group of related projects that are managed together using coordinated processes and techniques Portfolio Collections of programs, subportfolios, and projects that support strategic business goals or objectives Operations Ongoing functions that support the production of goods or services Initiation Phase During which phase of the project process group is the following done: Creating the project charter, creating a business case and justification, defining a high-level scope definit...

Acceptance criteria Requirements and conditions that must be met before the project deliverables are formally accepted. Acceptance test A group of end-users work with the final product to test it for unidentified issues that may appear during routine use. Also known as User Acceptance Testing (UAT). Actual duration The number of hours or days expanded to complete a project activity. Actual effort The actual number of person hours or days expended to complete an activity. Activity A spec...