T. Transistors are simply small electronic switches that can be in either an on or an off state.
T
T. A capacitor consists of three parts: an emitter, a collector, and a base.
F
T. A truth table with two inputs would have two rows.
F
T. The Boolean OR operator returns a 1 only when either or both of the inputs are 1.
T
T. The AND operator has an output of 1 (true) only if both inputs are 0.
F
T. The combinations of gates enables the computer to do all the things that it does.
T
T. Each gate in a circuit reacts in a completely unpredictable way.
F
T. The OR gate allows two inputs and one output.
T
T. The NOR gate is a combination of an OR gate and a(n) NAND gate.
F
T. In the adder, the bits are added according to the rules of the hexadecimal numbering system.
F
T. Decoder circuits perform functions such as addressing memory and selecting I/O devices.
T
T. The flip-flop circuit latches onto a bit and maintains the output state until it's changed.
T
T. Boolean expressions cannot be used to accurately predict what a circuit will do.
F
T. The computer has a crystal clock called a control clock that times, or synchronizes, each of the steps in the fetch-execute cycle.
F
T. Control wires contain the binary data that is being read from or written to memory and I/O.
F
T. Bus wires are divided into six separate signal groups.
F
T. 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.
F
T. ROM isn't erased when the computer power goes off.
T
T. RAM is volatile, meaning that when the power goes off, RAM is cleared.
T
T. The most commonly used form of mass storage is the floppy disk drive.
F
T. Flash memory is nonvolatile.
T
T. There are seven levels of RAID.
T
T. The mouse serves as a primary input device.
T
T. CRT displays are much thinner and run at a much cooler temperature than LCD monitors.
F
T. Interrupt handling is a much more efficient method for processing I/O than polling.
T
M. 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.
A. Capacitor
B. Transistor
C. Resistor
D. Inductor
B
M. _____ algebra is concerned with the logic of the operators AND, OR, and NOT.
A. Linear
B. Modern
C. Boolean
D. Fibonacci
C
M. The ____ operator works with a single input, and its purpose is to reverse the input.
A. XOR
B. NOT
C. AND
D. OR
B
M. 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 ____.
A. Gate
B. Register
C. Thread
D. Pin
A
M. The ____ gates are the basic building blocks of the CPU.
A. XOR, AND, and NOT
B. NAND and NOR
C. AND, OR, and NOT
D. NOR, NAND, and NOT
C
M. The NAND gate takes the output of the AND gate and then ____ it with the NOT gate.
A. Reverses
B. Amplifies
C. Duplicates
D. Scrambles
A
M. The truth table for the ____ gate indicates that the output is 1 only when the inputs are different.
A. OR
B. XOR
C. AND
D. NAND
B
M. A gate's output for any set of inputs follows the specifications given in the ____ table.
A. Variable
B. Data
C. Log
D. Truth
D
M. One of the main functions of the ____ of the computer's CPU is to add numbers.
A. Controller
B. ALU
C. Memory
D. Register
B
M. The high-speed cache memory in your computer is made of many thousands of ____ circuits.
A. Adder
B. Shifter
C. Flip-flop
D. Decoder
C
M. Vacuum tubes were replaced with ____.
A. Transistors
B. Diodes
C. Capacitors
D. Resistors
A
M. Very Large-Scale Integration (VLSI) chips contain ____ of circuits.
A. Hundreds
B. Thousands
C. Millions
D. Trillions
C
M. Most computers today are still based on the ____ architecture.
A. Hilbert
B. Turing
C. Von Neumann
D. Non Von
C
M. The portion of the CPU responsible for mathematical operations is the ____.
A. Control Unit
B. Registers
C. Cache
D. Arithmetic logic unit
D
M. One of the basics of Von Neumann architecture is the ____ cycle.
A. Encrypt-encapsulate
B. Edit-add
C. Store-revise
D. Fetch-execute
D
M. The term "____" refers to the family of components used to store programs and data.
A. Registers
B. Cache
C. RAM
D. Storage
D
M. RAM is called "____" because it doesn't have to be read sequentially.
A. Relative
B. Random
C. Remedial
D. Rapid
B
M. Hard disks are made up of one or more metal platters with a coating consisting of ____ particles.
A. Magnetic
B. Atomic
C. Photonic
D. Silicon
A
M. A 120-mm disc used to store data, music, and video in a computer system by using laser technology is known as a(n) ____.
A. DRAM
B. SRAM
C. DDRAM
D. CD-ROM
D
M. Keyboards, and most other I/O devices, connect to the main board through a(n) ____.
A. Socket
B. Adapter
C. Channel
D. Port
D
M. The process of painting an image on the screen of a monitor is called ____ scanning.
A. Raster
B. Roster
C. Cathode
D. dpi
A
M. Printer ____ ranges from 300 dpi to 2400 dpi for both inkjet and laser printers.
A. Definition
B. Variety
C. Size
D. Resolution
D
M. The sound card fits into the ____ bus expansion slot on the main board.
A. SCSI
B. PCI
C. ISA
D. System
B
M. 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.
A. Poll
B. Job
C. Interrupt
D. JCL
C
M. Factors such as memory type, bus speed, and even hard drive speed can affect overall speed far more than the ____ clock.
A. CPU
B. Master
C. ALU
D. OS
A
T. The signal-to-noise measures the quality of a communications channel.
T
T. The bit error rate usually increases as the transfer rate decreases.
F
T. The most common guided medium has been silicon.
F
T. Unguided media cannot transmit or carry infrared light signals.
F
T. Impedance makes the electrical signals weaken as they travel along the wire.
T
T. 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.
F
T. Inductance doesn't apply to fiber-optics cables at all.
T
T. Fiber-optic cables are much more susceptible to attenuation than copper cables.
F
T. Wireless networking uses the same technology as the radio in your car and the cell phone in your pocket.
T
T. Without protocols, computers would not function.
T
T. Without protocols, there would be no Internet.
T
T. The Data Link layer of the OSI model uses routing protocols to select optimal paths between two end systems.
F
T. Layers in the OSI model are defined and designed to provide services for the process of communicating between computers.
T
T. The distinction between LANs and WANs is clear and well defined.
F
T. The computers attached to a network are often referred to as nodes.
T
T. There are six basic LAN topologies.
F
T. Fast Ethernet speeds do not exceed 10 Mbps.
F
T. Each physical device connected to a network must have a network interface card (NIC).
T
T. Repeaters alter the content of the data in the signals that they boost.
F
T. Gateways can be used to connect networks of different types or to connect mainframe computers to PCs.
T
T. Shifting the starting point of an audio waveform is known as frequency modulation.
F
T. You can compress information by replacing repeating patterns with a code.
T
T. The normal copper wire used in your home is capable is actually capable of speeds faster than to 1.5 Mbps.
T
T. DSL (digital subscriber line) technologies do not allow the upload speed to differ from the download speed.
F
T. Cable modems provide for differing upload and download speeds.
T
M. The PCI system bus consists of ____ wires.
A. 10
B. 20
C. 98
D. 198
C
M. ____ 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.
A. Bandwidth
B. Byte capacity
C. Broadwidth
D. Bit capacity
A
M. The tendency of a signal to become weaker over distance is known as ____.
A. Alienation
B. Amelioration
C. Amplification
D. Attenuation
D
M. ____ media are physical media such as copper wire or fiber-optic cable.
A. Directed
B. Guided
C. Oriented
D. Undirected
B
M. Twisting copper wires nearly eliminates the electromagnetic effect known as ____.
A. Inductance
B. Impedance
C. Resistance
D. Resonance
A
M. Fiber-optic cables use ____ fibers to guide light pulses along a cable.
A. Plastic
B. Glass
C. Ceramic
D. Tungsten
B
M. ____ transmissions are capable of transmission rates up to 4 Mbps.
A. X-Ray
B. Microwave
C. Ultraviolet
D. Infrared
D
M. A(n) ____ is a set of rules designed to facilitate communication.
A. Protocol
B. Accord
C. Code
D. Procedure
A
M. A(n) ____ diagram shows the protocol interactions between two entities.
A. Assignment
B. Timing
C. Hierarchy
D. Flow
B
M. The OSI conceptual model for the communication process has ____ discrete layers.
A. Four
B. Five
C. Seven
D. Nine
C
M. The Transport layer of the OSI model uses data units called ____.
A. Bytegrams
B. Bitgrams
C. Words
D. Datagrams
D
M. The ____ layer of the OSI model is responsible for formatting data so that it’s ready for presentation to an application.
A. Session
B. Presentation
C. Data Link
D. Application
B
M. Each layer in the OSI model is defined in terms of a(n) ____ and a protocol data unit.
A. Header
B. Abstract
C. Brief
D. Comment
A
M. A ____ is a small number of computers connected together in close proximity, usually in a building or complex.
A. MAN
B. DAN
C. WAN
D. LAN
D
M. Network configurations are often referred to as network ____.
A. Structures
B. Topologies
C. Organizations
D. Arrangements
B
M. In a ____ topology, a computers or a network device serves as a central point, or hub, for all messages.
A. Bus
B. Ring
C. Star
D. Grid
C
M. A widely used technology that has become an industry standard for LANs is ____.
A. Ethernet
B. Token ring
C. FDDI
D. ATM
A
M. ____ are small, special-purpose devices or computers used to connect two or more networks.
A. Hubs
B. Bridges
C. Gateways
D. Routers
D
M. A ____ is a device designed to protect an internal network or node from intentional or unintentional damage from an external network.
A. Firewall
B. Gate
C. Fence
D. Barricade
A
M. ____ convert binary digits into sounds by modulating or modifying a tone.
A. Oscilloscopes
B. Transformers
C. Modems
D. Transceivers
C
M. Normal copper wire is capable of carrying ____ voice channels.
A. 4
B. 16
C. 24
D. 48
C
M. A digital transmission link with a capacity of 1.544 Mbps is known as a ____ line.
A. T1
B. T2
C. Broadband
D. Satellite
A
M. Normal telephone voice-grade lines use ____-division multiplexing to divide up the bandwidth among the subscribers.
A. Phase
B. Frequency
C. Amplitude
D. Wave
B
M. Because of attenuation, a DSL subscriber is required to be no more than ____ feet away from the nearest telephone company switching station.
A. 1,800
B. 6,500
C. 12,500
D. 18,000
D
M. Cable modems are capable of speeds up to ____.
A. 4.2 Mbps
B. 42 Mbps
C. 420 Mbps
D. 42 Gbps
B