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- 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 itβs 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
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