LIS final
A pixel is:
-abbreviated as "px" -a single point of color
The main types of data in information systems are (select all that apply):
-text -images -audio
Port
A channel for internet communications
Web design guidelines can never be broken; i.e., the same guidelines work for every project and never change.
False
When a message is sent over the Internet, data packets from the same message will always take the same route and arrive at their destination in the same order.
False
The CSMA/CD and CSMA/CA protocols are designed to manage what?
Message collisions
In many ways, a Web development project is similar to planning a database.
True
Metadata is data that defines other data in a database.
True
Modems modulate/demodulate signals to enable digital signals to be sent over analog networks.
True
Packet Switching is used by computer networks, while Circuit Switching is used predominantly in telegraph and telephone communications.
True
Programming languages are used to communicate instructions to computers.
True
TCP/IP is the standard protocol to support Internet communcations.
True
The 7-layer OSI model is a framework for conceptualizing the various functions a network must handle, not a plan for a specific network implementation.
True
The Relational Database Model represents data in the form of related tables.
True
The VPN (Virtual Private Network) creates a virtual, secure "tunnel" through which authentication data and private network traffic can pass over a public network.
True
Utility software and programming software belong to application software.
True
We need to know the cardinalities of the relationships to correctly transform ERD into relations.
True
Western Web page readers tend to focus on the upper left corner of the website, according to eye tracking studies.
True
Wi-Fi is a technology that takes an Internet signal and converts it into radio waves.
True
Topology
The physical layout of a wired network
Which of the following is NOT true for cloud computing:
Your information on the cloud will be lost if your hard drive crashes
Record
a set of fields related to the same thing, person or event...
File
a set of related records
Raster Graphics
bitmap, creates images by filling in squares within a grid, has aliased edges
Three elements are essential for computer networks. They are...
computers, connectivity, common language
The term Ethernet is often used as a synonym with which of the following types of local area networks?
connection bus network
Vector Graphics
creates images by mathematically defined formulas
sampling technology
representing analog signal as digital data
From Miller Text: Moore's Law predicts that the number of transistors on an integrated circuit will double every 18 months, while prices declined at a similar rate.
true
From Miller Text: The Internet is a global network of computer networks that utilizes packet switching and TCP/IP standard.
true
From Miller Text: The core idea of net neutrality is that all packets are equal; no packets are given "priority" status on the Internet over others.
true
GIF
uses LZW compression
logical view of data
description of the structure of data in a database to assist designers and users in understanding the data and the database
When data can be transmitted in both directions but not simultaneously, the transmission type is referred to as:
half-duplex
JPEG
has a lossy nature
PNG
has no ownership or licensing issues
Typography
how characters appear on a page or screen
Different network topologies discussed in the text include (select all that apply):
-Bus -Token Ring -Mesh
The essential components of an electronic computer are:
-CPU -Main memory -Storage -Input/Output
Which hardware components contribute to the speed of the computer?
-CPU -RAM -Motherboard -Hard drive
A "well-structured relation" should have the following features:
-Contains a minimum amount of redundancy -allows users to insert, modify, and delete the rows from a table without errors
ERDS are:
-Entity relationship diagram -tools to identify the data in a system and ensure it is represented properly -tools for identifying the entity types and diagramming the relationships between them
From Miller Text: Which of the follow are cloud computing services (select all that apply):
-Google Drive -iCloud -Amazon virtual machine -OneDrive
When evaluating data as a resource there are four factors, which include (select all that apply):
-Information Quality -Information Accessibility -information Security
What are the functions of an operating system?
-Manage hardware resources of a computer -Provide a platform for application software -Provide user-interface for users to use a computer
Which of the following are application software:
-Microsoft Word -Google Chrome -Computer games
There are two primary categories of software. They are:
-Operating systems -Application software
Select the tasks that are often intended for computers to complete (select all apply):
-Requires a high degree of accuracy -Repetitous, and would exceed human patience or capacity -Requires high speed
According to the reading, there are certain concepts common to all programming languages, including (select all apply):
-Sequence of commands -Conditional structures -Looping structures
Computer systems store data using which of the following methods (select all that apply):
-Sequential -Direct
View Integration problems can include (select all that apply):
-Synonyms -Homonyms -Dependencies between nonkeys
Which of the following are correct for User Experience (UX) design:
-UX design puts user in the center of the design process -UX design requires a deep understanding of user desires, needs, and preferences. -Usability tests help inform UX design
A web design should involve which of the following expertise:
-artistic design -technology expertise -content delivery
From Miller Text: Examples of Open Source Software include (select all that apply):
-drupal -MySQl -Apache
Which of the following are mobile Operating Systems:
-iOS -Android
Information Presentation is discussed in terms of
-level of summarization and format
Normalization is a technique that (select all that apply):
-organizes a database into its simplest form -eliminates redundancies -eliminates inconsistent dependencies
Which of the following is/are characteristic(s) of a wireless LAN?
-reasonably easy to plan and install -permits users of mobile devices to connect to the LAN -Less secure than a wired LAN
A successful entry/home page of a website needs to accomplish which goals (select all that apply):
-site branding -clear content presentation -excellent navigation
Field
A group of characters that have a predefined meaning...
3G
A number of technologies based on UMTS, WIMAX, Speeds of 55 to 614 Kbps
protocol
A set of rules used to facilitate interdevice communication
SVG
An XML-based vector graphic format
Ist "G"
Analog radio waves, speeds of 9.6 to 14.4 Kbps
Node
Any device connected to a network
What is the function of the CPU:
CPU carries out the commands sent to it by the software and returns results to be acted upon
Miller's book summarizes the web design process in a "25 step plan"
False
2G
Digitally encrypted, used GSM based on TDMA, speeds of 9.6 to 115 Kbps
Which of the following is NOT a conditional structure:
Do the following for each result in the list
Mobile devices, such as tablet and smartphones, do not need operating systems.
False
Relationship databases consist of a single file or table with a single key field
False
"Data warehousing" supports minute-to-minute processing of business transactions.
False
A "database management system (DBMS)" is the same as a "database."
False
Ethernet is another term for the Internet.
False
Hypertext was first used on the Internet in the 1980s.
False
In an one-to-many relationship, an instance from the "one" side entity can be associated with one and exactly one instance from the "many" side entity.
False
4G
IMT-Advanced network based on an all IP packet-switched network, speeds of 20 to 40 Mbps
Which of the following is NOT for long-terms data storage?
Main memory
Nadwidth
The capacity of the medium used to connect nodes..
Which one of the following is the fundamental unit of data transmitted over the Internet
Packet
RGB is a scheme to represent colors in computers by specifying the mix of Red, Green, and Blue. Which one of the follow is true about RGB:
RGB can make 2^24 colors available
Which of the following forwards all messages to all devices that are connected to it?
Router
SQL stands for
Structured Query Language
RAM is volatile meaning:
The data stored in RAM will be lost if power is off
In a relational database model, a relation is a named, two-dimensional table of data.
True
Functional Dependence of attribute B on attribute A means that there can be only one value of B for each value of A.
True
A data type is a coding scheme recognized by system software for representing the data.
True
A database is a structured collection of electronically stored data that is controlled and accessed through computers based on predefined relationships.
True
A primary key is one or more attributes that serve the purpose of uniquely identifying an instance in an entity. In other words, a primary key is that attribute whose value is unique across all occurrences of the relation.
True
Adding more RAM will speed up the computer bc more programs can be loaded for processing
True
Broadband is a generic term used for the various high bandwidth connection technologies.
True
For a program to work correctly, you will need correct commands in the right order.
True
Key
a field that uniquely identifies which person, thing, or event the record describes...
amplitude
measurement of the height of an analog waveform
frequency
measurement of the number of cycles per second of an analog waveform
physical view of data
specific location of data on storage media-what a computer has to know to find and retrieve data
Output resolution
the DPI of printed output
Bit resolution
the number of bits per pixel
Monitor resolution
the number of pixels on a screen
signal modulation
varying the analog signal to add information to a carrier signal
