System Analysis and Design Paper 30

1

Design of error detecting codes requires good






2

Sequence numbering of records is used to
i. Identify each record uniquely
ii. Track a missing record in a batch of records
iii. Count number of records
iv. Sort the records






3

For modulus-11 check digit to detect a single transposition errors the






4

An entity is






5

In an E-R diagram entities are represented by






6

A student can take not more than 5 subjects in a semester. The number of students allowed in a subject in a semester is not more than 40. The student - subject relationship is:






7

The relation given in Exercise 10.4.4 may be converted to 1 NF relation by






8

Given the relation of Exercise 10.7.5 it is reduced to the following BCNF relation






9

The ORDER PLACED FOR relation in Mini-case example 1 has the composite key order no, item code because






10

By data independence we mean application programs






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