Operating System

Operating System

Let's Review

Multiple Choice

What is volatile?

• is used to describe memory content that is lost when the power is interrupted or switched off.

• is used to describe memory content that is lost when the power is on.

Multiple Choice

Is RAM volatile or nonvolatile?

• Volatile, because all information will be erased when turned off.

• Nonvolatile, because information will remain in the memory even when turned off.

Multiple Choice

What is a storage device?

• A memory module that stores information and erased when turned off.

• a piece of computer equipment on which information can be stored.

Multiple Choice

Is Hard Disk Drive(HDD) volatile or nonvolatile?

• Volatile, because it can only store information when turned off

• Nonvolatile, because it can store information even when the computer is turned off

Multiple Choice

Which of the following devices is NOT examples of a Storage device?

• Mouse

• SSD

• RAM

• Flash Drive

Multiple Choice

What RAID stands for?

• Redundant Array of Independent Drive

• Repetitive Array of Independent Drive

Multiple Choice

is a removable flash memory storage device that you insert and remove from a slot in a computer, mobile device, or card reader/writer

• Memory Card

• Hard drive

Multiple Choice

consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser

• Optical Disc

• Memory Card

Multiple Choice

What is SDHC ?

• Secure Digital High Capacity

• Secure Digital Extended Capacity

• Security Digital High Capacity

• Security Digital Extended

Objectives

• Explain the purpose of an operating system

• Describe the start-up process and shutdown options on computers and mobile devices

• Explain how an operating system provides a user interface, manages programs, manages memory, and coordinates tasks

• Describe how an operating system enables users to configure devices, establish an Internet connection, and monitor performance

Operating System

• Most operating systems perform similar functions, some of which are illustrated on the right.

Starting Computers and Mobile Devices

If a computer or mobile device is off, you press a power button to turn it on

An operating system includes various power options

• Sleep mode saves any open documents and running programs or apps to RAM, turns off all unneeded functions, and then places the computer in a low-power state

• Hibernate mode saves any open documents and running programs or apps to an internal hard drive before removing power from the computer or device

An operating system includes various power options

• A user interface (UI) controls how you enter data and instructions and how information is displayed on the screen

• With a graphical user interface (GUI), you interact with menus and visual images

Examples of operating system graphical user interfaces on some computers and mobile devices

Command Line Enterface

• A command-line interface requires you to enter exact spelling, form, and punctuation

How an operating system handles programs directly affects your productivity

• Single tasking and multitasking

• Foreground and background

• Single user and multi user

• Memory management optimizes the use of the computer or device’s internal memory

• Virtual memory is a portion of a storage medium functioning as additional RAM

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The operating system determines the order in which tasks are processed

Operating Systems Functions

• A driver is a small program that tells the operating system how to communicate with a specific device

• Plug and Play automatically configures new devices as you install or connect them

• A performance monitor is a program that assesses and reports information about various computer resources and devices

• Operating systems typically provide a means to establish Internet connections

Operating Systems Functions

• Many programs, including operating systems, include an automatic update feature that regularly provides new features or corrections to the program

Operating systems often provide users with a variety of tools related to managing a computer, its devices, or its programs

• File Manager

• Search

• Image Viewer

• Uninstaller

• Disk Cleanup Disk

• Defragmenter

Operating systems often provide users with a variety of tools related to managing a computer, its devices, or its programs

• Screen Saver

• File Compression

• PC Maintenance

• Backup and Restore

• Power Management

Some operating systems are designed to work with a server on a network

A network administrator uses the server operating system to:

• Add and remove users, computers, and other devices

• Configure the network, install software and administer network security

A user account enables a use to sign in to, or access resources on, a network or computer

• A user name, or user ID, identifies a specific user

• A password is a private combination of characters associated with the user name

End of Part 1

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Watch Video Clip About Operating System

https://www.youtube.com/watch?v=GjNp0bBrjmU