MCQs

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Overall MCQs for Reference

1. In machine learning, a key-value pair typically represents:
   a. Feature and label
   b. Attribute and its value
   c. Model and accuracy
   d. Hyperparameter and loss
   Answer: b. Attribute and its valuedocsumo​
2. Which data structure is most commonly used for key-value pairs in memory?
   a. Array
   b. Hash table
   c. Queue
   d. Stack
   Answer: b. Hash tableexploredatabase​
3. In document extraction NLP, key-value pairs are identified primarily for:
   a. Visualization
   b. Text formatting
   c. Information retrieval
   d. Data normalization
   Answer: c. Information retrievalklearstack​
4. Key-value pairs are fundamental in which NoSQL database type?
   a. Column-oriented
   b. Document-oriented
   c. Key-value store
   d. Graph database
   Answer: c. Key-value storeplacementpreparation​
5. The “key” in a key-value pair signifies:
   a. The data context
   b. The data identifier
   c. The data content
   d. The data type
   Answer: b. The data identifierdocsumo​
6. Which operation is NOT typical for a key-value store?
   a. put(key, value)
   b. get(key)
   c. list(keys)
   d. sort(values)
   Answer: d. sort(values)bytebytego​
7. In machine learning, key-value pairs are commonly extracted from which type of data?
   a. Structured data
   b. Unstructured documents
   c. Audio recordings
   d. Numerical matrices
   Answer: b. Unstructured documentsnutrient​
8. A time-based key-value store allows:
   a. Storing only one value per key
   b. Multiple values for the same key with different timestamps
   c. Key duplication
   d. Only integer keys
   Answer: b. Multiple values for the same key with different timestampsalgo​
9. In natural language processing (NLP), key-value pairs are critical for:
   a. Sentence segmentation
   b. Tokenization
   c. Entity extraction from documents
   d. Image recognition
   Answer: c. Entity extraction from documentsklearstack​
10. Which process is essential when extracting key-value pairs from documents via machine learning?
    a. Sorting
    b. OCR (Optical Character Recognition)
    c. Clustering
    d. Regression
    Answer: b. OCR (Optical Character Recognition)nutrient​
11. Which database stores each record as a key-value pair?
    a. MySQL
    b. Oracle
    c. MongoDB
    d. Redis
    Answer: d. Redisplacementpreparation​
12. When querying a key-value pair, what will you retrieve?
    a. The data type
    b. The associated value
    c. The index position
    d. The schema definition
    Answer: b. The associated valuedocsumo​
13. Key-value extraction in ML is used to:
    a. Infer model structure
    b. Extract attribute-value pairs from data
    c. Validate neural network layers
    d. Optimize runtime
    Answer: b. Extract attribute-value pairs from dataklearstack​
14. Which of the following is NOT an application of key-value pairs in machine learning?
    a. Sentiment analysis
    b. Document classification
    c. Model evaluation
    d. Hyperparameter storage
    Answer: c. Model evaluationklearstack+1​
15. A practical application of key-value pair extraction in business is:
    a. Product scoring
    b. Invoice field extraction
    c. Feature normalization
    d. Output encryption
    Answer: b. Invoice field extractiongofishdigital​
16. Key-value pairs are sometimes referred to as:
    a. Arrays
    b. Maps or dictionaries
    c. Lists
    d. Tuples
    Answer: b. Maps or dictionariesexploredatabase​
17. Which programming language provides a built-in dictionary type for key-value pairs?
    a. C
    b. Python
    c. Assembly
    d. HTML
    Answer: b. Pythonexploredatabase​
18. For document processing, the spatial position of key-value pairs can be determined by:
    a. Text color analysis
    b. Bounding box detection
    c. Keyword frequency
    d. Data shuffling
    Answer: b. Bounding box detectiongofishdigital​
19. What is the key advantage of using key-value pairs in ML pipelines?
    a. Fixed schema
    b. Flexibility in data representation
    c. Strict typing
    d. Low storage cost
    Answer: b. Flexibility in data representationdocsumo​
20. The value part of a key-value pair can be:
    a. Only numbers
    b. Only strings
    c. Any data type
    d. Only lists
    Answer: c. Any data typedocsumo​
21. In key-value stores, what ensures data retrieval speed?
    a. Random access memory
    b. Indexing using hashing
    c. Data compression
    d. Encryption
    Answer: b. Indexing using hashingexploredatabase​
22. Key-value pair extraction using ML often involves which model type for images?
    a. Decision tree
    b. Convolutional neural network
    c. Logistic regression
    d. SVM
    Answer: b. Convolutional neural networkgofishdigital​
23. The process of storing and retrieving values based on unique keys is called:
    a. Classification
    b. Mapping
    c. Clustering
    d. Regression
    Answer: b. Mappingexploredatabase+1​
24. Key-value pairs are least suited for:
    a. Hierarchical data
    b. Flat, unstructured data
    c. Caching user sessions
    d. Storing configuration
    Answer: a. Hierarchical dataplacementpreparation​
25. A “collision” in a hash table storing key-value pairs happens when:
    a. Two keys map to the same index
    b. Keys and values are swapped
    c. Key is missing
    d. Value gets overwritten
    Answer: a. Two keys map to the same indexexploredatabase​
26. In Apache Cassandra, data is organized as:
    a. Arrays
    b. Key-value pairs
    c. Graph edges
    d. Binary trees
    Answer: b. Key-value pairsplacementpreparation​
27. Which operation is fundamental to key-value store functionality?
    a. Aggregation
    b. Query by key
    c. Sorting
    d. Grouping
    Answer: b. Query by keybytebytego​
28. In ML, storing hyperparameters as key-value pairs allows for:
    a. Easy lookup and modification
    b. Fast matrix multiplication
    c. Early stopping
    d. Overfitting prevention
    Answer: a. Easy lookup and modificationklearstack​
29. An example of a key-value pair in a ML model’s configuration:
    a. learning_rate: 0.01
    b.sanfoundry+1​
    c. “cat” or “dog”
    d. Binomial variable
    Answer: a. learning_rate: 0.01docsumo​
30. The init method in a time-based key-value store:
    a. Deletes all values
    b. Initializes the hash table
    c. Encrypts keys
    d. Sorts values
    Answer: b. Initializes the hash tablealgo​
31. Key-value data extraction for receipts is commonly used for:
    a. Cluster analysis
    b. Automated accounting
    c. Image enhancement
    d. Lossless compression
    Answer: b. Automated accountinggofishdigital​
32. One limitation of a basic key-value store is:
    a. Only supports one-to-many relationships
    b. No support for complex queries
    c. Cannot handle text data
    d. Cannot scale horizontally
    Answer: b. No support for complex queriesplacementpreparation​
33. Which storage system is optimized for key-value data with large volumes?
    a. Table-based SQL
    b. Distributed NoSQL databases
    c. Flat files
    d. Binary trees
    Answer: b. Distributed NoSQL databasesplacementpreparation​
34. In ML data labelling, a key-value pair might represent:
    a. Algorithm and accuracy
    b. Image ID and its class label
    c. Feature vector
    d. Loss and error
    Answer: b. Image ID and its class labelklearstack​
35. “put(key, value)” in key-value stores means:
    a. Update existing value or add a new key-value pair
    b. Remove the key from the store
    c. Sort values before adding
    d. Map multiple values to a single key
    Answer: a. Update existing value or add a new key-value pairbytebytego​
36. What is necessary for extracting key-value pairs from a scanned invoice using ML?
    a. Parsing HTML
    b. Using OCR and ML models
    c. Data normalization only
    d. Binary search
    Answer: b. Using OCR and ML modelsnutrient+1​
37. An example key in a shopping receipt extraction process:
    a. “Total Amount”
    b. “Random string”
    c. “Font size”
    d. “Algorithm class”
    Answer: a. “Total Amount”gofishdigital​
38. To generalize key-value pair extraction from various document types, ML models need to:
    a. Only look for keywords
    b. Learn diverse document structures
    c. Use non-text features only
    d. Focus on word frequency
    Answer: b. Learn diverse document structuresgofishdigital​
39. Which of the following is NOT a key feature of document-based key-value pair extraction systems?
    a. Adaptability to layout changes
    b. Extraction of tables as key-value pairs
    c. Static header recognition only
    d. Contextual analysis
    Answer: c. Static header recognition onlygofishdigital+1​
40. In binary classification, label encoding can be stored as:
    a. A string list
    b. Key-value mapping
    c. Fixed arrays
    d. Integer sums
    Answer: b. Key-value mappingdocsumo​
41. Which of the following best describes a key-value pair’s utility in machine learning audit trails?
    a. Fast removal of data
    b. Tracking changes with associations
    c. Generating synthetic data
    d. Improving GAN performance
    Answer: b. Tracking changes with associationsalgo​
42. Which of these is NOT a method for creating key-value pairs in Python?
    a. dict()
    b. {}
    c. set()
    d. zip()
    Answer: c. set()exploredatabase​
43. What is the main use of key-value pairs in distributed cache solutions?
    a. Training neural networks
    b. Fast lookup and storage of sessions
    c. Data anonymization
    d. Automated testing
    Answer: b. Fast lookup and storage of sessionsstackoverflow​
44. The process of key-value pair “extraction” is also known in ML as:
    a. Mapping
    b. Parsing
    c. Recognition
    d. Data structuring
    Answer: b. Parsingdocsumo​
45. In TensorFlow, a lookup table for conversion of labels can be implemented as:
    a. List
    b. Key-value dictionary
    c. Tuple
    d. Array
    Answer: b. Key-value dictionarydocsumo​
46. When using key-value stores for time-series data, each value is often tagged with:
    a. Index position
    b. Timestamp
    c. Document header
    d. Random string
    Answer: b. Timestampalgo​
47. Which key-value related data type is native to JavaScript?
    a. Map
    b. Set
    c. ArrayBuffer
    d. IntList
    Answer: a. Mapexploredatabase​
48. Key-value pair extraction for compliance purposes is vital for:
    a. Sentiment scoring
    b. Regulatory reporting
    c. Loss minimization
    d. Data augmentation
    Answer: b. Regulatory reportingnutrient​
49. A key-value pair structure best supports which ML use case?
    a. Structured feature engineering
    b. High-dimensional clustering
    c. Simple attribute-value mapping
    d. Latent space optimization
    Answer: c. Simple attribute-value mappingdocsumo​
50. In ML pipeline configuration files, parameters are typically represented as:
    a. Comments
    b. Key-value pairs
    c. Short integers
    d. Dataframes
    Answer: b. Key-value pairsklearstack+1​

1. https://www.docsumo.com/blog/key-value-pair-extraction
2. https://www.exploredatabase.com/2021/03/data-structures-and-algorithms-mcq-with-answers-set-10.html
3. https://klearstack.com/key-value-extraction-nlp-at-the-workplace
4. https://www.placementpreparation.io/mcq/big-data/page/3/
5. https://bytebytego.com/courses/system-design-interview/design-a-key-value-store
6. https://www.nutrient.io/guides/document-engine/extraction/key-value-pairs/data-model/
7. https://algo.monster/liteproblems/981
8. https://gofishdigital.com/blog/document-processing-using-structured-key-value-pairs/
9. https://www.sanfoundry.com/1000-machine-learning-questions-answers/
10. https://phdtalks.org/2021/10/machine-learning-mcq.html
11. https://stackoverflow.com/questions/6935566/when-to-use-a-key-value-store-for-web-development
12. https://www.gyansetu.in/blog/machine-learning-mcq-interview-preparation/
13. https://www.scribd.com/document/801824862/MCQ-Machine-Learning
14. https://jojozhuang.github.io/algorithm/problem-versioned-key-value-store/
15. https://studyglance.in/objquestions/display.php?url=btech%2Fml-unit-1.txt&title=Machine+Learning++MCQs+-+Unit-1&subject=ML&furl=data%2Fbtech%2Fbtechobjquestions.xlsx
16. https://www.igmguru.com/blog/machine-learning-mcqs
17. https://workat.tech/machine-coding/practice/design-key-value-store-6gz6cq124k65
18. https://leetcode.com/problems/time-based-key-value-store/
19. https://www.gdpicture.com/blog/new-key-value-pair-data-extractor-ocr-engine/
20. https://learn.microsoft.com/en-us/azure/ai-services/document-intelligence/prebuilt/general-document?view=doc-intel-4.0.0