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## Min Hash MCQs

**1. Which technique was firstly used clustering documents using the similarity of two words or strings?**

a) MinHash

b) Stack

c) Priority Queue

d) PAT Tree

**Answer: **MinHash

**2. Which indicator is used for similarity between two sets?**

a) Rope Tree

b) Jaccard Coefficient

c) Tango Tree

d) MinHash Coefficient

**Answer: **Jaccard Coefficient

**3. Which of the following is defined as the ratio of total elements of intersection and union of two sets?**

a) Rope Tree

b) Jaccard Coefficient Index

c) Tango Tree

d) MinHash Coefficient

**Answer: **Jaccard Coefficient Index

**4. What is the value of the Jaccard index when the two sets are disjoint?**

a) 1

b) 2

c) 3

d) 0

**Answer: **0

**5. When are the members of two sets more common relatively?**

a) Jaccard Index is Closer to 1

b) Jaccard Index is Closer to 0

c) Jaccard Index is Closer to -1

d) Jaccard Index is Farther to 1

**Answer: **Jaccard Index is Closer to 1

**6. What is the expected error for estimating the Jaccard index using MinHash scheme for k different hash functions?**

a) O (log k!)

b) O (k!)

c) O (k2)

d) O (1/k½)

**Answer: **O (1/k½)

**7. How many hashes will be needed for calculating Jaccard index with an expected error less than or equal to 0.05?**

a) 100

b) 200

c) 300

d) 400

**Answer: **400

**8. What is the expected error by the estimator Chernoff bound on the samples performed without replacement?**

a) O (log k!)

b) O (k!)

c) O (k2)

d) O (1/k½)

**Answer: **O (1/k½)

**9. What is the time required for single variant hashing to maintain the minimum hash queue?**

a) O (log n!)

b) O (n!)

c) O (n2)

d) O (n)

**Answer: **O (n)

**10. How many bits are needed to specify the single permutation by min-wise independent family?**

a) O (log n!)

b) O (n!)

c) Ω (n2)

d) Ω (n)

**Answer: **Ω (n)

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Categories: Hash Tables