Interested to Buy Any Domain ? << Click Here >> for more details...
Can u please describe the different types of traps with eg.
Thanks
- 2 Answers
- 9272 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / the_xxx
There are two main types of connection traps:
1. fan traps
2. chasm traps
Fan traps
A fan trap occurs when a model represents a relationship
between entity types, but the pathway between certain entity
occurrences is ambiguous. It occurs when 1:m relationships
fan out from a single entity.
Missing ALT text
Figure : Fan Trap
A single site contains many departments and employs many
staff. However, which staff work in a particular department?
The fan trap is resolved by restructuring the original ER
model to represent the correct association.
Missing ALT text
Figure : Resolved Fan Trap
Chasm traps
A chasm trap occurs when a model suggests the existence of a
relationship between entity types, but the pathway does not
exist between certain entity occurrences.
It occurs where there is a relationship with partial
participation, which forms part of the pathway between
entities that are related.
Missing ALT text
Figure : Chasm Trap
* A single branch is allocated many staff who oversee
the management of properties for rent. Not all staff oversee
property and not all property is managed by a member of staff.
* What properties are available at a branch?
* The partial participation of Staff and Property in the
oversees relation means that some properties cannot be
associated with a branch office through a member of staff.
* We need to add the missing relationship which is
called `has' between the Branch and the Property entities.
* You need to therefore be careful when you remove
relationships which you consider to be redundant.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / divakar
There will be traps w.r.t query joins in FM. They are when
1. there is infinite relation existing between query
subjects like A->B->C->A
2. there is ambiguous relationship(No proper relationship)
Then there will be traps while running the query or w.r.t.
data.
| Is This Answer Correct ? | 1 Yes | 0 No |
can any one say the which is the best performance in framework manager
what is query subject
What is defined as Cognos Impromptu?
Explain what is the main advantage of impromptu over cognos reportnet?
How do you test the performance of a report?
what is the use of layout calculation?
write the sql query to display 5th and 10th row in a table?
What is the importance of Dimension in the cognos.
what is differences between the group span and levelspan
what is cardinality that you can give to employee and department query subjects in framework manager?
How to create users and permissions in cognos?
Hi..I have COG-112(Report Author),COG-122(Admin),COG-132(Meta data modelling). I took test end of Sep '09.I got 100% wcore with these dumps. If any body need then mail me on kris.bi121@gmail.com
Teradata 
