Assertion (A) : Precision is the fraction of the documents retrieved that are relevant to the user’s information need.
Reason (R) : In practical situations, recall and precision are always inversely related.
Assertion and Reason Analysis: Precision and Recall
This section evaluates the truthfulness of the given Assertion (A) and Reason (R) concerning metrics used in information retrieval.
Evaluating Assertion (A)
Assertion (A) states: Precision is the fraction of the documents retrieved that are relevant to the user’s information need.
- Definition of Precision: Precision measures the relevance of the search results. It is calculated as the ratio of the number of relevant documents retrieved to the total number of documents retrieved by the system.
- Truthfulness: The statement accurately defines precision. Therefore, Assertion (A) is true.
Evaluating Reason (R)
Reason (R) states: In practical situations, recall and precision are always inversely related.
- Relationship between Recall and Precision: Recall is the fraction of relevant documents that are retrieved out of all the relevant documents that exist. While there is often a trade-off between recall and precision (improving one may decrease the other), this relationship is not *always* inverse.
- Counterexample: It's possible to improve both metrics simultaneously, especially when a system is suboptimal. For instance, refining a search algorithm might retrieve more relevant documents (increasing recall) without significantly increasing irrelevant ones (maintaining or increasing precision).
- Truthfulness: The claim that they are *always* inversely related is an oversimplification and thus incorrect. Therefore, Reason (R) is false.
Conclusion
Based on the analysis:
- Assertion (A) is true.
- Reason (R) is false.
This corresponds to the option where (A) is true and (R) is false.
Important Questions from Information Technology
Match the items of List II with List I and select the correct code:
List-I
List-II
(a) H.M.L. classification (i) To determine the criticality of an item and its effect on production and other services. It is specially used for classification of spare parts. (b) V.E.D. classification (ii) Based on the pattern of issues from stores and is useful in controlling obsolescence and helpful in identifying active items and surplus items. (c) SDE classification (iii) The classification unit value is the criterion and not the annual consumption. (d) FSN classification (iv) Based on problems faced in procurements, availability of items and useful in the context of scarcity of supply.
Codes:What is “Block Chain” in the field of information technology?
The following statements are related to technology transfer between countries. Choose the correct code for the statements being correct or incorrect.
Statement I : Import of techniques and machinery is a mode of technology transfer.
Statement II : Technology transferred through government for common welfare is considered as free market transfer and is not subject to patent laws.
Match List I with List II:
List I (COP 27)
List II (COP 27 Action Plan)
A.
Mitigation
I.
Promote climate know-how solutions.
B.
Capitalize
II.
Empowering all stakeholders to engage in climate action.
C.
Technology
III.
Phase down unabated coal power.
D.
Capacity Building
IV.
Creation of “loss and damage fund”
Choose the correct answer from the options given below:Which of the following is a type of information system?
