String hashing MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

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1. : What is the primary purpose of string hashing?





2. : Which of the following is a common use of string hashing?





3. : What is a hash function?





4. : Which property is crucial for a good hash function?





5. : What is a collision in the context of hashing?





6. : Which of the following is a common approach to handle collisions?





7. : What is a rolling hash?





8. : In string hashing, what is the purpose of a modulus operation?





9. : What is the time complexity of computing a hash for a string of length n using a simple polynomial hash function?





10. : What is one disadvantage of using a naive hash function?





11. : Which of the following hash functions is commonly used for string hashing?





12. : In the context of string hashing, what does “perfect hashing” mean?





13. : What is a common application of string hashing in databases?





14. : What does the term “load factor” refer to in hashing?





15. : Which of the following is NOT a characteristic of a good hash function?





16. : How does a cryptographic hash function differ from a regular hash function?





17. : What is the result of applying a hash function to an empty string?





18. : Which hashing technique would be most efficient for large datasets with frequent insertions and deletions?





19. : What happens if two strings hash to the same value using a hash function?





20. : Which of the following is a simple example of a hash function?





21. : In string hashing, what does a “hash table” refer to?





22. : What is the primary benefit of using a hashing technique in programming?





23. : What does it mean to “rehash” a hash table?





24. : Which of the following is an example of a hash collision resolution technique?





25. : What is a disadvantage of separate chaining for collision resolution?





26. : How does a hash table maintain efficiency?





27. : What is the time complexity of searching for an element in a well-distributed hash table?





28. : Which hash function is based on polynomial rolling?





29. : What type of data structure is often used to implement separate chaining?





30. : What is a major disadvantage of open addressing?





31. : In which scenario would you prefer string hashing?





32. : What is the significance of the hash value?





33. : How does the choice of a hash function impact performance?





34. : What would be an ideal characteristic of a hash function?





35. : What is a potential issue with using a simple additive hash function?





36. : In string hashing, what does “dynamic resizing” refer to?





37. : What is a common method to enhance the efficiency of a hash table?





38. : Which of the following best describes “universal hashing”?





39. : What is the effect of a high load factor on a hash table?





40. : What is a common application of rolling hash in algorithms?





   

Data Structures MCQs

Basic Concepts
  1. Introduction to Data Structures
  2. Complexity Analysis MCQs
Linear Data Structures MCQs
  1. Arrays MCQs
  2. Linked Lists MCQs
  3. Stacks MCQs
  4. Queues MCQs
Non-Linear Data Structures MCQs
  1. Trees MCQs
  2. Heaps MCQs
  3. Graphs MCQs
Hashing MCQs MCQs
  1. Hash Tables
Sorting and Searching Algorithms MCQs 
  1. Sorting Algorithms MCQs
  2. Searching Algorithms MCQs
Miscellaneous
  1. Memory Management in data structures MCQs
  2. String Manipulation Algorithms MCQs
  1. Data Structures MCQs 1
  2. Data Structures MCQs 2
  3. Data Structures MCQs 3
  4. Data Structures MCQs 4
  5. Data Structures MCQs 5
  6. Stacks Solved MCQs
  7. Queues MCQs
  8. pointer mcqs
  9. Array MCQs
 

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