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• Computer's Hardware -✓✓The physical equipment used for the input, processing,
output, and storage activities of a computer system
• Central Processing Unit (CPU) -✓✓manipulates the data and controls the tasks
performed by the other components
• Primary Storage -✓✓temporarily stores data and program instructions during
processing
• Secondary Storage -✓✓stores data and programs for future use
• Input Technologies -✓✓Accept data and instructions and convert them to a form that
the computer can understand
• Output technologies -✓✓present data and information in a form people can understand
• Communication technologies -✓✓provide the flow of data from external computer
networks (Internet) to the CPU, and from the CPU to computer networks
• Types of Servers -✓✓Supercomputers, mainframe computers
• Supercomputers -✓✓the fastest computers available at any time.
• Who uses supercomputers? -✓✓Due to the high cost they are generally used by large
organizations (military, scientific research) to execute computationally demanding tasks
involving large data
• Mainframe Computers -✓✓computers at the high end of the performance and reliability
scales and can handle millions of transactions per day
• Types of Clients -✓✓microcomputers (desktop PCs), laptops, tablets, wearable clients
• Microcomputers -✓✓the smallest and least expensive category of general-purpose
computers
• Laptops -✓✓small, easily transportable, lightweight microcomputers
, • Tablets -✓✓a complete computer contained entirely in a flat touchscreen
• Wearable clients -✓✓apple watch
• Types of Primary Memory (main memory) -✓✓register memory, cache memory,
random access memory (RAM), read only memory (ROM)
• Cache Memory -✓✓Primary memory- High speed memory that enables the computer
to temporarily store blocks of data that are used more frequently
• Register Memory -✓✓Primary Memory- part of the CPU. Has the least capacity and
stores data only immediately before and after processing. located closer to CPU than
the RAM
• Random Access Memory (RAM) -✓✓Primary memory- holds a software program and
small amounts of data for processing
• Read only Memory (ROM) -✓✓Primary Memory- type of chip where certain critical
instructions are held and retains these instructions even when the computer is off
• Types of Secondary Storage -✓✓Magnetic tape, magnetic discs, solid state drives
(SSD), Optical storage devices, Flash memory (memory cards)
• Magnetic tape -✓✓secondary storage- on a large open reel or in a smaller cartridge or
cassette
• Magnetic Discs -✓✓secondary storage- most widely used
• Solid state drives (SSD) -✓✓secondary storage- serve the same purpose as a hard
drive and store data in memory chips, but do not have moving parts
• Optical storage devices -✓✓secondary storage- laser reads the surface of a reflective
plastic platter
• Flash Memory (memory cards) -✓✓nonvolatile electronic storage devices with no
moving parts and use 30x less battery power than hard drives
• Advantages of flash memory -✓✓smaller and more durable than hard drives
• Types of computer memory -✓✓primary memory (main memory), secondary memory
• Role of software -✓✓users communicate with application softwares, which
communicate with systems software, which communicate with hardware