IS117 Computing and Word Processing
Assessment 1 – Work Package 2
Task 1Question # Answer
1 Clock system is a system that controls how fast all the operations that operates within a computer as the process take place. System clock switches from 0 and 1 at a million times per second rate.
2 a. The speed of the Central Processing Unitb .The size of the Random Access Memoryc. The speed and capacity of the Hard Diskd. Multiple applications running on the computer. e. Type of graphic card which is GPU speed and video memoryf. Age and configuration of operating system
3 Binary system is the method of representing numbers by using only two digits which is 0 and 1.This means that all the data and program instructions that goes into the computer are represented in binary numbers.
4 Bit is the smallest unit of data that a binary computer can recognize while byte is collectively eight bits that grouped together.
5 Memory cache is a special high speed memory chips located on or close to the CPU which can access quickly. It is used to speed up processing by temporarily storing data and instruction that may be needed next by the CPU.
6 Level 1(L1) cache is extremely fast but quite small, and is usually inserted in the processor chip(CPU) although level 2 (L2) cache is often larger than L1 and is on a separate chip with a high speed that can be accessed more quickly than the large main memory.
7 a. Flash memory cardsb. Optical discsc. Diskettes/ floppy disksd. Magnetic tapes
8 Flash memory card –is a small card containing one or more flash memory chips, a controller chip, other electrical components, and metal contacts to connect the card to the device or reader being used. Flash memory cards are available in a variety of formats, such as compact flash (CF), secure digital (SD), secure digital high capacity (SDHC). Optical discs are thin circular discs made out of essentially a type of very strong plastic – that are topped with layers of other materials and coatings used to store data and protect the disc. Data are stored on optical discs such as CDs, DVDs, and Blu-ray Discs (BDs) using laser beams .Diskettes/floppy disks are removable round, flat piece of plastic that store data and programs as magnetized spots. A disk drive copies, or reads, data from the disk and writes , or records, data to the disk. Magnetic tape is a thin plastic tape that has been coated with a substance that can be magnetized and data can be represented with magnetic spots. Mag tape is much older than flash memory and other removable devices. Today mag tape is used mainly to provide backup, or duplicate storage but it’s less expensive compared to others.
9 a. System bus
b. Expansion bus
10 A system bus is part of the motherboard and connects the processor to main memory. An expansion bus allows the processor to communicate with peripherals. The expansion connects to the expansion bus, which allows the processor to communicate with the peripherals attached to the adapter card. Data transmitted to memory or the processor travels from both the expansion bus and the system bus. Both buses allow the various devices both inside and attached to the system unit to communicate with each other.
Question # Answer Question # Answer
1 True 6 True
2 False 7 True
3 True 8 True
4 False 9 True
5 True 10 True
Question # Term Definition
1 Processor B
2 Memory module D
3 U3 smart drive F
4 IrDA C
5 Bay E
Answer A Barcode reader is an input device
A barcode is an optical code that represents data with bars of varying widths or heights or the vertical striped marks that are seen on most manufactured retail products. Barcode readers, photoelectric scanners that translate the barcode symbols into digital forms. Barcodes are read with barcode readers, which use either light reflecting from the barcode or imaging technology to interpret the bars contained in the barcode as the numbers or letters they represent.
Barcode reader was invented in June, 1974 by Bernard Silver, a graduate student at Drexel Institute of Technology in Philadelphia.
Two of the most familiar barcodes are UPC (universal product code) the barcode found on package goods in supermarkets and other retail stores and ISBN (International standard book number) the type of barcode used with printed books. However, apart from the two mentioned there are many other barcodes that are used for different purposes.
Businesses and organizations can also create and use custom barcodes to fulfill their unique needs. For instance, shipping organizations use custom barcodes to mark and track packages; hospital use custom barcodes to match patients with their charts and medicines; researchers use custom barcodes to tag and track the migration habits of animals; and law enforcement agencies use custom barcodes to mark evidence.
Fixed barcode readers are frequently used in point of sale (POS) systems; portable barcode readers are also available. The price of a particular item is set within the store’s computer and appears on the salesclerk’s point of sale terminal and on the receipt. Records of sales input to the store’s computer and used for accounting, restocking store inventory, and weeding out products that don’t sell well. Newer two dimensional (2D) barcodes, such as QR codes store more data than traditional barcodes and are designed to be read by smartphones for consumer application. However, a resent innovation is the self-scanning bar-code reader, which grocers hope will extend the concept of self-service and help them lower costs.
Therefore, barcode reader is one of the input device which enables reading and translation of barcode symbols into digital form. Different types of barcode can be used for different purposes but it must be a barcode reader to read and translate information.