Section 1 Flashcards
The computer and human have what similar characteristics (4)
- Perform simple and complex tasks
- Enter, receive, and store information
- Give instructions
- Short-term vs. long-term memory
A programmable, electronic device that performs specifically tasks (simple and complex) assigned by a computer program through an IPOS cycle is a __________.
Computer
While performing tasks, computers store and process _____ to generate __________.
data, information
A computers ________ gives commands tot he ________ to perform tasks.
software, hardware
The physical components of a computer system (keyboard, mouse, CPU, monitor, printer, hard disks, etc) is it’s ___________.
hardware
Programs that allow computers to perform specific tasks or applications are called _________. It has two main categories; _________ __________ and ___________ _________.
software
system software and application software
A new computer comes with system software known as the _____________ _______. It is required to interface with the computer and manages all the computer ________ and ________.
Operating system; hardware and software
Microsoft Word, Powerpoint, and Excel are examples of ____________ ________ __________.
Application Software Packages
The Information Processing Cycle is known as IPOS, which stands for?
Input/Processing/Output/Storage
Entering Data into the computer is which part of the IPOS acronym?
Input
Performing operations on the data is which part of the IPOS acronym?
Processing
Presenting the results is which part of the IPOS acronym?
Output
Saving data, programs, or output for future use is which part of the IPOS acronym?
Storage
_______ is a collection of text, numbers, images, audio, and video that has not been processed yet.
Data
__________ is processed data that may aid in making decisions, answering questions, or getting results that take a meaningful form.
Information
6 basic types of data
- Text
- Graphic
- Audio
- Video
- Date/Time
- Multimedia
Which data type? Collection of alphabet letters, numbers, and special characters.
Text Data
Which data type? Photographs, mathematical charts, and drawings.
Graphic Data
Which data type? Sounds, such as music and voice.
Audio Data
Which data type? Moving pictures and images.
Video Data
Which data type? Date and time of a specific event
Date/Time Data
Which data type? Combinations of text, number, and/or audio/video.
Multimedia
A systematic way to write or represent any number is called a _________ _______.
number system
Any character or piece of data typed on a keyboard must be converted to a ________ _______ _______, which is interpreted and processed by a computer.
binary number system
The _______ of a number system tell you how many digits will be used to represent a number.
base
All characters typed on a computer are first converted to their decimal equivalent and then to the a _______ code.
binary
To transfer a decimal number to binary code you must:
- Divide the decimal number by 2, giving you a quotient and a remainder
- Divide the quotient from step 1 by 2, giving another quotient and another remainder.
- The division by 2 continues until the quotient is 0 and remainder is 1.
The very last remainder digit it written first, then the next is second, until all digits are written.
Find the binary code for letter A, where the decimal number is 65.
- 65/2= quotient 32 remainder 1
- 32/2=quotient 16 remainder 0
- 16/2=quotient 8 remainder 0
- 8/2=quotient 4 remainder 0
- 4/2=quotient 2 remainder 0
- 2/2=quotient 1 remainder 0
- 1/2=quotient 0 remainder 1
binary code = 1000001
Machine language uses what two digits? Hint” Binary numbers”
0 and 1
What language does computers use to process data or information that is made solely from two numerical values (0 and 1)?
Machine
bits is short for?
Binary Digits
To represent data in a computer system, any character typed must be converted into an eight big binary code that is a combination of eight 0’s and 1’s in _______ (or Uni-code) coding schemes.
ASCII
Digits 0 and 1 (bits) represent the smallest unit of information - computers use a group of eight bits, known as ______, which is a combination of 0’s and 1’s, to present any _____________ typed.
bytes, character
Binary digits 0 and 1 act like an _________ switch, where 0 is the _____ state and 1 is the _____ state.
electrical; off, on
______ ____ is any data in computer machine language or binary digit form that is handled by computers or mobile devices.
Digital Data
ASCII stands for
American Standard Code for Information Interchange
EBDCIC stands for
Extended Binary-Coded Decimal Interchange Code
_____ is the universal international coding standard that represents characters from other languages and uses a 16 binary digit (2 bytes) patterns. The first 256 characters are the same as the ASCII coding system.
Unicode
Operators are special symbols used to manipulate numeric values and perform __________ on one, two, or three operands and return a single result.
operations
Examples of arithmetic operators are:
+ - / *
Examples of comparison operators are:
> < >= <= and !=
Name the 6 categories of computers
- Supercomputers
- Mainframe computers
- Personal Computers (PC)
- Mobile Devices
- Wearable computers
- Embedded computers
All computers go through the _______ cycle and need hardware, an operating system, and __________ to perform their operations.
IPOS, software
____________ were designed to perform complex mathematical calculations at extremely high speed. They are used by governments and are also used for scientific research. They are the most expensive and are very large in size.
Supercomputers
____________ computers are large, expensive, and powerful computers that allow thousands of users to perform tasks simultaneously. Large companies use these computers, so multiple employees can access computer records at the same time.
Mainframe
__________ computers are often referred to as a desktop computer, they are compact and include a mouse, keyboard, CPU, monitor and printer, an internal hard disk and flash drives, etc.
Personal
___________ computers are portable and easy-to-carry devices. They include cell phones, GPS, PDA, laptops, and pagers.
Mobile Devices
______ _______ is a mobil computing device that has its own operating system and includes a small keyboard, some have a touch-sensitive screen, a built-in processing hardware device, LCD or other screen, storage via read-only memory (ROM) chip, network connectivity, anti-virus software, and a rechargeable battery.
Cell Phones
_______ _________ _________ are handheld devices that carry information in a digital (binary number) form. They can store contact information, photos, games, songs, calculator. They can connect to the internet, have a mini keyboard and stylus, LCD screen, ROM, and a RAM chip for additional programs, can transfer data to other devices, anti-virus software, and can sync to a computer with a USB cable.
Personal Digital Assistant (PDA)
_________ ___________ ______ is a collection of satellites that constantly orbit earth. Designed, built, and operated by the US Military - provides precise 3-dimensional geographic locations to a GPS receiver on earth by analyzing signals sent by satellites. Today they are built into newer mobile devices, used for navigation.
Global Positioning System (GPS)
_________ _________ __________ is a mobile electronic device that plays and supports digital audio files and images on it’s hard drive or flash memory cards.
Portable Media Player
_________ __________ are portable, thin, lightweight, and easy-to-carry computer that can have the same power and capabilities as desktop computers
Laptop computers
__________ _________ are worn on some part of the body, used in applications that require people to record and send data via the Internet or to perform computations while doing something else. Come in he form of headsets, watches, jackets, and eyeglasses. An example is an insulin pump.
Wearable computers
__________ computers are small computer chips that are built inside another operating product or device and perform a specialized function. Used in almost every product or appliance we encounter in our daily lives.
Embedded
___________ devices are attached to the computer system in order to perform a variety of tasks.
Peripheral
6 categories of computer hardware devices
- input device hardware
- processing device hardware
- output device hardware
- storage device hardware
- communication device hardware
- network device hardware
Keyboard, mouse, I-pen, Digital pen, point of sale POS terminals, ATM’s, audio devices, imaging and video devices, sound card devices, touch input devices, gaming input devices, biometric input devices, scanning devices, and devices for the handicap are all examples of ________ devices.
input
fax machines, page and handheld scanners, optical mark readers (scantron), magnetic card readers,, magnetic ink character recognition readers (MICR), bar code readers, and RFID’s are examples of __________ devices.
scanning
______________ is the main circuit board of a computer system unit. It includes the CPU, RAM, chipset, expansion slots, basic input/output system (BIOS), serial and parallel ports for peripheral devices, a battery-operated chip for the clock, controllers, and expansion buses to connect expansion cards.
Motherboard
___________ ______ are located on the back of the system unit, are opening in the motherboard where you insert extra cards such as a sound card or modem card.
Expansion slot
____________ _____ are added to a system in order to provide additional functionality, such as expanding your sound options or a network interface card (NIC) to connect to a network.
Expansion card
Hierarch of Computer Memory
- CPU Registers
- Cache level 1
- Cache level 2
- Cache level 3
- Random Access Memory (RAM)
- Secondary Storage Device (Hard Disk)
* *Virtual Memory - when RAM runs out of space to store programs.
_____ _________ is used to access certain pieces of data or instructions quickly and has 3 levels
Cache
_______ ______ ________ is a volatile, temporary working memory of the computer where all data, instructions, programs, or documents are stored while the computer is in use. All contents are lost when the computer is turned off.
Random Access Memory (RAM)
________ _______ is used when there is not enough RM left to store programs that a user is trying to execute, an OS sets aside a certain portion of storage on the hard disk to act s addition RAM and store the data.
Virtual Memory
________ are connectors located on the back or front of a computer system and are used to connect various peripheral devices to the system unit, such as a printer or scanner.
Ports
_______ ports send one bit of data at a time, like one care moving on one lane of a highway.
Serial
__________ ports sent two or more bits of data at a time and are much faster than serial ports. They are like a multilane highway.
Parellel
_______ ________ _____ ports are used to connect a wide variety of input, output, or peripheral devices, such as printers, keyboards, external hard drives., etc.
Universal serial bus (USB)
___________ ports help a computer communicate with other computers or get access to networks.
Connectivity
___________ ports look similar to phone jacks but wider and are used to connect a computer to another computer, local network, or external DS or cable model.
ethernet
_________ ports are digital devices that connect via USB 2.0 and allow the fastest transfer of data.
FireWire
Graphics ports or video ports are used to connected a _________ to a computer.
monitor