73793
| Pregunta | Respuesta |
| Flash memory is nonvolatile | True |
| A sound consists of a waveform with amplitude (volume) and ____ (pitch). | Frequency |
| There are seven levels of RAID | True |
| ____ are small, special-purpose devices or computers used to connect two or more networks. | Routers |
| The computer samples sounds at fixed intervals and each sample is assigned a binary value according to its ____. | Amplitude |
| The mouse serves as a primary input device | True |
| CRT displays are much thinner and run at a much cooler temperature than LCD monitors | False |
| A ____ is a device designed to protect an internal network or node from intentional or unintentional damage from an external network | Firewall |
| Which of the following is an example of a video compression format? | MPEG |
| ____ convert binary digits into sounds by modulating or modifying a tone | Modems |
| Interrupt handling is a much more efficient method for processing I/0 than polling | True |
| By switching on and off, the ____ can be used to represent the 1s and 0s that are the foundation of all that goes on in the computer | Transitor |
| Normal copper wire is capable of carrying ____ voice channels | 24 |
| A digital transmission link with a capacity of 1.544 Mbps is known as a ____ line | T1 |
| ____ algebra is concerned with the logic of the operators AND, OR, and NOT | Boolean |
| Normal telephone voice-grade lines use ____-division multiplexing to divide up the bandwidth among the subscribers. | Frequency |
| The ____ operator works with a single input, and its purpose is to reverse the input | NOT |
| Because of attenuation, a DSL subscriber is required to be no more than ____ feet away from the nearest telephone company switching station. | 18,000 |
| A transistor-based circuit in the computer that implements Boolean logic by creating a single output value for a given set of input values is known as a ____ | Gate |
| Cable modems are capable of speeds up to ____. | 42Mbps |
| The ____ gates are the basic building blocks of the CPU | AND, OR and NOT |
| The NAND gate takes the output of the AND gate and then ____ it with the NOT gate | Reverses |
| The truth table for the ____ gate indicates that the output is 1 only when the inputs are different | XOR |
| A gate’s output for any set of inputs follows the specifications given in the ____ table | Truth |
| One of the main functions of the ____ of the computer’s CPU is to add numbers. | ALU |
| The high-speed cache memory in your computer is made of many thousands of ____ circuits | Flip-flop |
| Vacuum tubes were replaced with ____ | Transitors |
| The MCP is the software “control center” of modern computer systems. | False |
| Without a database most applications would be useless | True |
| A database management system (DBMS) provides an end-user interface with the database | True |
| The operating system is the first program loaded into memory when the computer starts (boots). | True |
| The operating system is the first program loaded into memory when the computer starts (boots). | True |
| Very Large-Scale Integration (VLSI) chips contain ____ of circuits. | Millions |
| When power is turned on, the CPU begins executing the instructions stored in the CMOS chip. | False |
| A DBMS delegates the task of ensuring data integrity to the operating system | False |
| An OS can reside on a ROM chip. | True |
| Applications cannot be designed to run on multiple platforms. | False |
| Most computers today are still based on the ____ architecture | Von Neumann |
| A DBMS manages multiple users’ access to the database | True |
| Clients are computers that are used to service many different users. | False |
| An attribute is also called a relation | False |
| Every multipurpose device with a CPU must also have an OS. | True |
| A collection of columns referring to one item is called a row or tuple | True |
| DOS and Linux use a graphical user interface. | False |
| The portion of the CPU responsible for mathematical operations is the ____ | Arithmetic Logic Unit |
| Indexes do not require additional storage space in the database | False |
| The Windows operating system no longer provides a command-line interface. | False |
| The information stored in a database is kept in natural or sequential order. | True |
| In Windows you can view running processes by pressing Ctrl+Alt+Delete to open Task Manager and then clicking the Processes tab to display information on all running processes. | True |
| From a database design point of view, first normal form is better than second normal form | False |
| Von Neumann architecture supports the parallel execution of instructions. | False |
| One of the basics of Von Neumann architecture is the ____ cycle | Fetch-Execute |
| You could define a database table based on unnormalized tables, but redundancies and dependencies can cause problems when the table is in use. | True |
| The parts of a computer system, such as the CPU, memory, keyboard, monitor, and network adapter, function at different speeds. | True |
| I/O devices will always work correctly from the basic installation in the environment in which they’re installed. | False |
| The term “____” refers to the family of components used to store programs and dat | Storage |
| A determinant is also called a composite key | False |
| A column is functionally dependent on another column if for each value of the first column, there is only one value for the second column | True |
| Plug and Play was intended to create a computer with hardware and software that worked together to configure devices and assign resources automatically, making hardware changes and additions easier. | True |
| The third normal form creates columns that are independent of the primary key | False |
| Deadlock issues are always resolved without the intervention of the operating system. | True |
| Operating systems are responsible for protecting memory and other resources. | True |
| The main rules in database design are the second and third normal forms | False |
| Files can be viewed as leaves (nodes) on a tree structure. | True |
| A one-to-many relationship is the most common relationship | True |
| One-to-one relationships are very common | False |
| The RETURN BY clause enables you to change how data is returned from the SELECT statement | False |
| RAM is called “____” because it doesn’t have to be read sequentiall | Random |
| There are many SQL commands for maintaining, defining, and administering the data in a database | True |
| SQL deals with only the data you want to see. | True |
| SQL commands may not be lowercase | False |
| Every column must be initialized with data | False |
| Hard disks are made up of one or more metal platters with a coating consisting of ____ particles | Magnetic |
| The order of the fields in the SELECT statement doesn’t have to match that of the defined table structure | True |
| The MORE clause in a SQL SELECT statement specifies additional criteria for retrieving data from a table | False |
| In relation to refining searches, the keyword AND indicates that all criteria must be met | True |
| By default, the SELECT statement returns data in no particular order | False |
| Data that has been organized and logically related to allow access, retrieval, and use of that data is called a ____ | Database |
| A special language known as ____ is used to query or extract information from databases | Structured Query Language |
| ____ was one of the computer scientists at IBM creating a theoretical model for designing data structures | E.F. Codd |
| You can practice DOS commands by opening a DOS command window in Windows. | False |
| A DBMS helps manage data and extract information from a database by using a(n) ____ language. | Query |
| Linux commands have what are called command-line switches (sometimes called parameters or flags), used in the format: ls -lrt | True |
| A 120-mm disc used to store data, music, and video in a computer system by using laser technology is known as a(n) ___ | CD-ROM |
| A ____ or entity is arranged into rows or columns much like a spreadsheet | Table |
| The set of possible values for each column is called the ____ of that column | Domain |
| eyboards, and most other I/O devices, connect to the main board through a(n) ____ | Port |
| A(n) ____ is a special type of file that occupies its own space and specifies one or more columns that determine how information stored in a table can be accessed more efficiently | Index |
| Windows and Linux use the fdisk command to partition hard drives. | True |
| When the columns are used to determine the sort order of information, they are called sort ____. | Keys |
| Formatting can be used to place a copy of the OS on the disk so that it can be used as a boot disk. | True |
| You cannot create child folders inside user-created folders. | False |
| The parent-child structure has nearly unlimited depth. | True |
| The set of rules that dictates how databases are designed is called ____ | Normalization |
| In general, folder names must start with a letter and can include additional numbers or letters and some special characters, up to a maximum length of 255 characters. | True |
| The process of painting an image on the screen of a monitor is called ____ scanning | Raster |
| To put the table into the ____ normal form, any columns containing two values need to be separated into two rows. | First |
| Command-line OSs such as Linux allow recovering folders and files after they have been deleted. | False |
| Command-line OSs such as Linux allow recovering folders and files after they have been deleted. | False |
| Interface programs that allow a computer to interact with peripheral devices are called ____. | Drivers |
| Printer ____ ranges from 300 dpi to 2400 dpi for both inkjet and laser printers | Resolution |
| The ____ is the core of the OS. | Kernel |
| The OS running on a computer is often called its ____ and is typically tied to a particular CPU. | Platform |
| A ____ key is simply a column or combination of columns that uniquely identifies a row within a table. | Primary |
| Coordinated execution of a process, using two or more CPUs at the same time is known as ____. | Multiprocessing |
| A ____ operating system is an OS designed to provide strong network services. | Network |
| ____ is a primary function of an operating system. | Managing Resources |
| The sound card fits into the ____ bus expansion slot on the main board | PCI |
| A(n) ____ key is a primary key made up of more than one column. | Composite |
| DOS and Linux use a(n) ____-line interface and are sometimes called console operating systems. | Command |
| A small program running on a computer is known as a ____. | Process |
| ____ was designed to accommodate multiple users and multiple tasks. | Linux |
| Time ____ is a method of allocating fixed time units to running processes so that it appears to users that all processes are running simultaneously. | Slicing |
| Placing a table into second normal form eliminates ____ of data. | Repetition |
| When an interrupt occurs, the CPU stops what it’s doing and goes to a program in memory called a(n) ____ handler. | Interrupt |
| When an interrupt occurs, the CPU stops what it’s doing and goes to a program in memory called a(n) ____ handler. | Interrupt |
| A rare situation in which processes are waiting for each other for use of resources is known as ____. | Deadlock |
| A(n) ____ dependency exists when one column is dependent on another column that isn’t the primary key | Transitive |
| All programs and processes running on a computer are stored in ____. | RAM |
| When an I/O device places a voltage signal on a(n) ____ line, the associated chip checks its priority before passing it on to the CPU | Interrupt |
| A(n) ____ defines how one table (entity) works with or relates to another | Relationship |
| OSs allow you to organize files into structures called folders or ____. | Directories |
| A(n) ____ key is a column in one table that relates to the primary key in another. | Foreign |
| ____ are an area of a hard disk reserved to hold files of a particular OS type. | Partitions |
| A visual representation of how all the tables or entities interact and relate to each other in a database is called a(n) ____ relationship model. | Entity |
| In Linux, entering ____command gives you the manual pages with information on the command you specify. | man |
| Factors such as memory type, bus speed, and even hard drive speed can affect overall speed far more than the ____ clock. | CPU |
| In Linus, to exit manual pages, simply type “____.” | q |
| ____ shows the numeric occurrences between entities in an ER model | Cardinality |
| The process of ____ arranges the disk surface into addressable areas and sets up the basic directory tree structure on the disk. | Formatting |
| The ____ command enables Linux to partition a disk drive. | fdisk |
| Which of following is a valid SQL command for constructing a table? | CREATE TABLE |
| In Windows ____, you can browse the tree structures of your drives. | Explorer |
| In Windows, deleted files and folders reside in the ____ Bin folder until it is emptied. | Recycle |
| The keyword ____ indicates that data is not required for a specified column | NULL |
| ____ are symbols that are used to match any character and are used in selecting files or directories. | Wildcards |
| Wildcard specifications are case sensitive in ____. | Linux |
| SQL statements are closed with a(n) ____. | Semicolon |
| Partitioning, ____, and creating folders are done to prepare the drive to receive files. | Formatting |
| Moving files is similar to ____ files. | Copying |
| The ____ statement is used to add new rows of data to a table. | INSERT INTO |
| The ____ statement is the most commonly used SQL statement | SELECT |
| B2C e-commerce is a useful tool for connecting business partners in a virtual supply chain to cut resupply times and reduce costs. | False |
| Producers or providers of consumer products using B2C e-commerce must use middlemen, or intermediaries, between them and the consumer. | False |
| If you want to arrange the data more meaningfully when using the SELECT statement, you can specify the ____ column names. | ORDER BY |
| G2B applications are designed to improve communications among the various levels of government. | False |
| If you want data returned in descending order, you simply place the keyword ____ next to the column in the ORDER BY clause | DESC |
| E-commerce relies on the use of wireless devices, such as personal digital assistants, cell phones, and smartphones, to place orders and conduct business. | False |
| Each e-commerce Web site must have Web server software to perform fundamental services, including security and identification, retrieval and sending of Web pages, Web site tracking, Web site development, and Web-page development. | True |
| A server that handles dynamic content must be able to access information from a variety of databases. | True |
| The use of open database connectivity enables the Web server to assemble information from different database management systems, such as SQL Server, Oracle, and Informix. | True |
| Product configuration software tools were originally developed in the 1960s to assist B2C salespeople to match their company’s products to customer needs. | False |
| E-commerce software must support five core tasks: catalog management, product configuration, shopping cart facilities, e-commerce transaction processing, and Web traffic data analysis. | True |
| For m-commerce to work effectively, the interface between the wireless device and its user must improve to the point that it is nearly as easy to purchase an item on a wireless device as it is to purchase it on a PC. | True |
| A user with a WAP-compliant device uses the built-in microbrowser to make a WML request. | True |
| A CA is responsible for guaranteeing that the people or organizations that are granted unique digital certificates are, in fact, who they claim to be. | True |
| The DSL communications protocol includes a handshake stage, which authenticates the server (and the client, if needed), determines the encryption and hashing algorithms to be used, and exchanges encryption keys. | False |
| Credit cards are better protected from misuse than conventional smart, charge, and debit cards because the credit-card information is encrypted. | False |
| A smart card makes credit theft practically impossible because a key to unlock the encrypted information is required, and there is no external number that a thief can identify and no physical signature a thief can forge. | True |
| Enterprise systems employ a database of key operational and planning data that can be shared by all. | True |
| Web services can combine software and services from different companies to provide an integrated way to communicate. | True |
| A characteristic of an online transaction processing system is that there is some delay between an event and the eventual processing of the related transaction to update the organization’s records. | False |
| Often, results from one TPS flow downstream to become input to other systems. | True |
| Systems design attempts to answer the questions “What is the problem, and is it worth solving?” | False |
| Systems investigation attempts to answer the question “What must the information system do to solve the problem?” | False |
| Systems design seeks to answer the question “How will the information system do what it must do to obtain the problem solution?” | True |
| Systems analysis details system outputs, inputs, and user interfaces; specifies hardware, software, database, telecommunications, personnel, and procedure components; and shows how these components are related. | False |
| Systems design results in an installed, operational information system that meets the business needs for which it was developed. | False |
| Prototyping begins with creating a preliminary model of a major subsystem or a scaled- down version of the entire system. | True |
| Agile development requires frequent face-to-face meetings with the systems developers and users as they modify, refine, and test how the system meets users’ needs and what its capabilities are. | True |
| The signal-to-noise ratio measures the quality of a communications channel | True |
| XP uses pairs of programmers who work together to design, test, and code parts of the systems they develop. | True |
| JAD often uses group support systems (GSSs) software to foster positive group interactions, while suppressing negative group behavior. | True |
| The bit error rate usually increases as the transfer rate decreases | False |
| Legal feasibility can include logistical and motivational (acceptance of change) considerations. | False |
| The most common guided medium has been silicon | False |
| Legal feasibility involves an analysis of existing and future laws to determine the likelihood of legal action against the systems development project and the possible consequences. | True |
| Every computer game, program, picture, or sound is stored in the computer as a series of decimal digits | False |
| The object-oriented approach can be used during all phases of systems development, from investigation to maintenance and review. | True |
| Unguided media cannot transmit or carry infrared light signals | False |
| Negative powers are used to represent the fractional portion of numbers | True |
| The primary outcome of systems analysis is a prioritized list of systems requirements. | True |
| Data modeling is most often accomplished through the use of entity-relationship (ER) diagrams. | True |
| Activity modeling is often accomplished through the use of data-flow diagrams. | True |
| The hexadecimal numbering system has seventeen unique digits | False |
| DFDs work on the premise that every activity involves some communication, transference, or flow that can be described as a data element. | True |
| Impedance makes the electrical signals weaken as they travel along the wire | True |
| The primary result of the systems maintenance phase is a technical design that details system outputs, inputs, and user interfaces; specifies hardware, software, databases, telecommunications, personnel, and procedures; and shows how these components are related. | False |
| A sequence of events is often called an interface, and can be diagrammed in a sequence diagram. | False |
| Twisted pair cable has been a popular medium in the past, but it’s being replaced in most instances by coaxial cables that are less expensive to produce and have even higher bandwidths | False |
| Parallel start-up involves running the new system for one group of users rather than all users. | False |
| Inductance doesn’t apply to fiber-optic cables at all | True |
| The hexadecimal numbering system uses letters to represent digits beyond nine | True |
| Pilot start-up involves running both the old and new systems for a period of time. | False |
| The term radix is synonymous with positional value. | False |
| A ____ is a professional who specializes in analyzing and designing business systems. | Systems analyst |
| Fiber-optic cables are much more susceptible to attenuation than copper cables | False |
| For any quantity, there’s a number in any base to represent it. | True |
| In systems development, the ____ is responsible for modifying or developing programs to satisfy user requirements. | Programmer |
| A counting table can be used to convert numbers from one base to another. | True |
| In the ____ phase of the SDLC, potential problems and opportunities are identified and considered in light of the goals of the business. | Systems Investigation |
| Wireless networking uses the same technology as the radio in your car and the cell phone in your pocke | True |
| The ____ phase of the SDLC involves studying existing systems and work processes to identify strengths, weaknesses, and opportunities for improvement. | Systems analysis |
| Without protocols, computers would not function | True |
| The primary result of the ____ phase is a technical design that either describes the new system or describes how existing systems will be modified. | Systems design |
| Adding numbers in other bases follows nearly the same steps as in decimal numbers. | True |
| The difference between adding numbers in base 10 and any other base lies in the carry process. | True |
| Without protocols, there would be no Internet | True |
| ____ involves creating or acquiring the various system components detailed in the systems design, assembling them, and placing the new or modified system into operation. | Systems Implantation |
| You cannot multiply or divide any base. | False |
| ____ takes an iterative approach to the systems development process. During each iteration, requirements and alternative solutions to the problem are identified and analyzed, new solutions are designed, and a portion of the system is implemented. | Prototyping |
| The Data Link layer of the OSI model uses routing protocols to select optimal paths between two end system | False |
| ____ employs tools, techniques, and methodologies designed to speed application development. | Rapid Application Assessment |
| Half of a byte is sometimes referred to as a nibble | True |
| RAD makes extensive use of the ____ process for data collection and requirements analysis. | Joint application development |
| Layers in the OSI model are defined and designed to provide services for the process of communicating between computers. | True |
| Computer scientists sometimes use hexadecimal as a shorthand method for representing binary values | True |
| ____ combine(s) the logic of the systems development life cycle with the power of object-oriented modeling and programming. | Object-oriented systems development |
| The distinction between LANs and WANs is clear and well defined | False |
| Whole numbers, or integer numbers, can be represented internally in a computer as hexadecimal numbers. | False |
| The computers attached to a network are often referred to as nodes | True |
| Signed and unsigned numbers in a computer are designed to always take up a different number of bits. | False |
| The ____ is a document that is filled out by someone who wants the IS department to initiate systems investigation. | Systems request form |
| There are six basic LAN topologies | False |
| Negative fractional numbers cannot be internally represented in a computer. | False |
| ____ feasibility is concerned with whether the hardware, software, and other system components can be acquired or developed to solve the problem. | Technical |
| The Unicode character standard is compatible with the extended ASCII standard. | True |
| ____ feasibility determines whether the project makes financial sense and whether predicted benefits offset the cost and time needed to obtain them. | Economic |
| Fast Ethernet speeds do not exceed 10 Mbps. | False |
| ____ feasibility determines whether laws or regulations can prevent or limit a systems development project. | Legal |
| ____ feasibility is a measure of whether the project can be put into action or operation. | Operational |
| The Unicode method of character representation is fast becoming obsolete. | False |
| The ____ report summarizes the results of systems investigation and the process of feasibility analysis and recommends a course of action: continue on into systems analysis, modify the project in some manner, or drop it. | Systems investigation |
| Each physical device connected to a network must have a network interface card (NIC). | True |
| The number of pixels in each row and column defines a display device’s resolution. | True |
| Repeaters alter the content of the data in the signals that they boost | False |
| A common resolution on a PC monitor is 1024 x 768, which means the monitor is displaying 1024 rows with 768 dots, or pixels, in each row. | False |
| Gateways can be used to connect networks of different types or to connect mainframe computers to PCs | True |
| With ____, one or more members of the analysis team directly observe the existing system in action. | Direct Observation |
| As the resolution numbers get larger for a monitor, the size of each pixel gets larger. | False |
| When many data sources are spread over a wide geographic area, ____ might be the best approach to data collection. | Questionnaires |
| Shifting the starting point of an audio waveform is known as frequency modulatio | False |
| Sounds are stored in the computer in a manner very similar to images. | True |
| ____ is the manipulation of the collected data so that the development team members who are participating in systems analysis can use the data. | Data analysis |
| You can compress information by replacing repeating patterns with a code | True |
| The normal copper wire used in your home is capable is actually capable of speeds faster than to 1.5 Mbps | True |
| The number of words used for each sound sample determines how many unique amplitude levels can be represented. | False |
| ____ is a commonly accepted approach to modeling organizational objects and associations that employ both text and graphics. | Data Modeling |
| Raw audio samples are often stored in uncompressed file formats, such as WAV files. | True |
| DSL (digital subscriber line) technologies do not allow the upload speed to differ from the download speed | False |
| A(n) ____ models objects, associations, and activities by describing how data can flow between and around various objects. | Data flow diagram |
| The purpose of ____ is to answer the question “How will the information system solve a problem?” | Systems design |
| Cable modems provide for differing upload and download speed | True |
| It is not possible to learn to program or to manage a database without understanding binary and hexadecimal number systems. | False |
| Displays containing the contents of a computer’s memory or the hard disk are often referred to as ____ memory dumps. | Hexadecimal |
| ____ is a description of the functional requirements of a system. | Logical design |
| The PCI system bus consists of ____ wires | 98 |
| ____ is the specification of the characteristics of the system components necessary to put the logical design into action. | Physical design |
| ____ measures how much information can be carried in a given time period over a wired or wireless communication medium, usually measured in bits per second | Bandwitch |
| A(n) ____ is the primary result of systems design, reflecting the decisions made and preparing the way for systems implementation. | Design report |
| The number 10-4 evaluates to ____. | 0.00001 |
| ____ includes hardware acquisition, programming and software acquisition or development, user preparation, hiring and training of personnel, site and data preparation, installation, testing, start-up, and user acceptance. | Systems Implementation |
| The tendency of a signal to become weaker over distance is known as ____ | Attentuation |
| The preparation of the location of a new system is called ____. | Site preparation |
| A ____ is identified by the number of digits a numbering system has, including the digit 0. | Base |
| ____ involves making sure that all files and databases are ready to be used with new computer software and systems. | Data conversion |
| The concept of ____ value exists in all numbering bases. | Positional |
| ____ is the final step of systems development, involving the analysis of systems to make sure that they are operating as intended. | Systems review |
| ____ media are physical media such as copper wire or fiber-optic cable. | Guided |
| Transistors are simply small electronic switches that can be in either an on or an off state | True |
| Twisting copper wires nearly eliminates the electromagnetic effect known as ____. | Inductance |
| According to positional value, the binary number 10012 represents ____ things. | 9 |
| A capacitor consists of three parts: an emitter, a collector, and a base | False |
| Fiber-optic cables use ____ fibers to guide light pulses along a cable | Glass |
| ____ values are used to calculate how many of something a number represents. | Positional |
| A truth table with two inputs would have two rows | False |
| A ____ value is calculated by raising the base to the power indicated by the position. | Positional |
| ____ transmissions are capable of transmission rates up to 4 Mbps | Infared |
| The letters ____ are used in hexadecimal to represent numeric values above 9. | A-F |
| The Boolean OR operator returns a 1 only when either or both of the inputs are 1 | True |
| A(n) ____ is a set of rules designed to facilitate communication | Protocol |
| To use the Windows calculator to convert between hex, binary, and decimal make sure the calculator is in the ____ view. | Scientific |
| The AND operator has an output of 1 (true) only if both inputs are 0 | False |
| A(n) ____ diagram shows the protocol interactions between two entities | Timing |
| A group of 8 bits considered as one unit is known as a ____. | Byte |
| Each 1 and 0 (on and off ) in a computer is referred to as a ____. | Bit |
| The combinations of gates enables the computer to do all the things that it does | True |
| Larger groups of bits (more than 8) are referred to as ____. | Words |
| Each gate in a circuit reacts in a completely unpredictable way | False |
| The OSI conceptual model for the communication process has ____ discrete layers | Seven |
| The OR gate allows two inputs and one output | True |
| The Transport layer of the OSI model uses data units called ____. | Datagrams |
| The NOR gate is a combination of an OR gate and a(n) NAND gate | False |
| When separating these binary digits into groups of four, you must begin grouping on the ____. | Right |
| In the adder, the bits are added according to the rules of the hexadecimal numbering system | False |
| The ____ layer of the OSI model is responsible for formatting data so that it’s ready for presentation to an application | Presentation |
| When converting from hex to binary, each hexadecimal digit corresponds to a(n) ____-bit binary pattern. | 4 |
| Decoder circuits perform functions such as addressing memory and selecting I/O devices | True |
| The flip-flop circuit latches onto a bit and maintains the output state until it’s changed | True |
| Each layer in the OSI model is defined in terms of a(n) ____ and a protocol data unit | Header |
| ____ complement is a method of representing negative numbers in a computer system. | Twos |
| To find the ____ of a given bit, flip it to the opposite state. | Complement |
| Boolean expressions cannot be used to accurately predict what a circuit will do | False |
| The computer has a crystal clock called a control clock that times, or synchronizes, each of the steps in the fetch-execute cycle | False |
| A ____ is a small number of computers connected together in close proximity, usually in a building or complex. | LAN |
| In scientific notation, the method of displaying numbers uses a(n) ____ and an exponent. | Mantissa |
| Control wires contain the binary data that is being read from or written to memory and I/0 | False |
| Network configurations are often referred to as network ____ | Topologies |
| The eight bit extended ASCII (American Standard Code for Information Interchange) character set can be used to represent ____ characters. | 256 |
| Bus wires are divided into six separate signal groups | False |
| A ____ is the smallest unit that can be displayed on a computer monitor. | Pixel |
| The bus signal group data contains a clock-timing signal for the bus as well as other wires pertaining to timing and the bus protocol | False |
| In a ____ topology, a computers or a network device serves as a central point, or hub, for all message | Star |
| Each pixel is stored in the computer as a(n) ____ pattern containing information about its color and brightness. | Binary |
| ROM isn’t erased when the computer power goes off | True |
| Unicode character representation uses a(n) ____-bit standard. | 16 |
| RAM is volatile, meaning that when the power goes off, RAM is cleared | True |
| The most commonly used form of mass storage is the floppy disk drive | False |
| A widely used technology that has become an industry standard for LANs is ____ | Ethernet |
| JPG and GIF are examples of ____ image formats. | Compressed |
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