Information Retrieval

Question 1

Adhering to technical and other information standards facilitates the merging of resources from different organizing systems: the conformance to standard data formats contributes to the achievement of ____________ with other systems.

Answer 1

Interoperability

Question 2

Which of the following are true of interactions based on derived properties?

• Decreases the system’s context awareness
• supported by external data sources
• may use popularity-based ranking
• is derived from citation-based ranking
• is inherent to the resources or the collection

Answer 2

• supported by external data sources
• may use popularity-based ranking
• is derived from citation-based ranking

Question 3

The design of an organizing system is constrained by:

• resource properties
• legal requirements
• common sense
• technical system properties

Answer 3

• resource properties
• legal requirements
• technical system properties

Question 4

The probabilistic retrieval model estimates the likelihood that a resource will be _________ to an information need

Answer 4

relevant

Question 5

One way to distinguish between information retrieval models is to observe the way in which the system performs comparisons between resources and queries.

Answer 5

True

Question 6

Which of the following statements is true?

• precision equals the number of records retrieved divided by the number of records in the database
• precision measures the completeness of a result set
• precision equals the number of relevant records retrieved divided by the number of relevant records int he database.
• precision reveals how many of the retrieved resources returned from a query are relevant.

Answer 6

Precision reveals how many of the retrieved resources returned from a query are relevant.

Question 7

Organizing systems interactions should be designed to ensure users ask the right questions.

Answer 7

False

Question 8

Resource-based interactions require three basic actions: comparing resources, ranking and sorting resources, and ____________ resources

Answer 8

locating

Question 9

Recall equals the number of relevant records retrieved divided by the total number of relevant records in the database.

Answer 9

True

Question 10

When an information retrieval system processes text, it can be programmed to perform several tasks. Match the tasks with their possible characteristics:

Tasks:
Normalization. Stopword Elimination, Stemming

Characteristics:

• removes the “ing” from all words
• is not semantically expressive
• transforms all acronyms into fully spelled words

Answer 10

Normalization - transforms all acronyms into fully spelled words

Stopword Elimination - is not semantically expressive

Stemming - removes the “ing” from all words