System Analysis and Design

261. A code is useful to represent a key field because

1. it is a concise representation of the field
2. it is usually done by all
3. it is generally a good idea
4. it is needed in database design

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262. Block codes are

1. concise
2. meaningful
3. expandable
4. comprehensive

1. i and ii
2. ii and iii
3. iii and iv
4. i and iii

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263. A modulus-11 check digit is used to detect error in

1. alphanumeric codes
2. numeric codes
3. hexadecimal codes
4. serial number code

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264. Modulus-17 check character for the hexadecimal code AB4567 is

1. F
2. D
3. 1
4. 0

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265. Radix check for a field representing year is

1. possible
2. not possible
3. not relevant
4. may be tried

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266. Batch control totals will detect

1. incorrect data entry of a field
2. missing record
3. data records out of order
4. inconsistent data

1. i and ii
2. i, ii and iii
3. ii, iii and iv
4. iii and iv

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267. By metadata we mean

1. very large data
2. data about data
3. data dictionary
4. meaningful data

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268. Errors occur more often when

1. data is entered by users
2. data is entered by operators
3. when data is handwritten by users and entered by an operator
4. the key board design is bad

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269. Data inputs which required coding are

1. fields which specify prices
2. key fields
3. name fields such as product name
4. fields which are of variable length

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270. By the term "comprehensive code" we understand that the code

1. conveys information on item being coded
2. is of small length
3. can add new item easily
4. includes all relevant characteristics of item being coded

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