Design
Gbogbo ọrọ náà
Once the analyst knows what the new system must do, the next stage is to design it on paper before anyone builds it. Design is where the shape of the data, the look of the screens and printouts, and the rules that keep bad data out are all decided in detail. A good design saves enormous amounts of wasted effort later, because mistakes are far cheaper to fix on a design sheet than in finished software.
In this lesson you will learn how to design file and data structures, choosing field names, lengths and data types and using codes to save space. You will design data capture forms, screen layouts and report layouts, and you will master the six validation routines (range, character, length, type, format, presence) plus the check digit, knowing exactly what each one does and when to use it.
Ebumnobi
- Design.
- Design file/data structures, input formats, output formats and validation routines File/data structures including field length, field name, data type, coding of data for example M for male, F for female Validation routines including range check, character check, length check, type check, format check, presence check, check digit Input formats including data capture forms Output formats including screen layouts and report layouts.
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Design. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which validation routine would check that a date is entered as dd/mm/yyyy? A. Range check B. Format check C. Presence check D. Type check Answer: B
- A telephone number should be stored as which data type? A. Numeric: integer B. Boolean C. Alphanumeric/text D. Currency Answer: C
- The field that uniquely identifies each record is called the: A. Foreign key B. Primary key C. Field length D. Data type Answer: B
- Which validation routine can detect that two digits have been transposed during input? A. Length check B. Presence check C. Check digit D. Type check Answer: C
- Validation is best described as a check that data is: A. Accurate B. Correct C. Reasonable D. Verified Answer: C
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Design? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
