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## Hash Tables Chaining using Linked Lists MCQs

**1. Which of the following is not a collision resolution technique?**

a) Separate chaining

b) Linear probing

c) Quadratic probing

d) Hashing

**Answer: **Hashing

**2. In a hash table of size 10, where is element 7 placed?**

a) 6

b) 7

c) 17

d) 16

**Answer: **7

**3. What should be the load factor for separate chaining hashing?**

a) 0.5

b) 1

c) 1.5

d) 2

**Answer: **1

**4. Which of the following operations are done in a hash table?**

a) Insert only

b) Search only

c) Insert and search

d) Replace

**Answer: **Insert and search

**5. Which of the following is identical to that of a separate chaining hash node?**

a) Linked list

b) Array

c) Stack

d) Queue

**Answer: **Linked list

**6. Which of the following is the hashing function for separate chaining?**

a) H(x)=(hash(x)+f(i)) mod table size

b) H(x)=hash(x)+i2 mod table size

c) H(x)=x mod table size

d) H(x)=x mod (table size * 2)

**Answer: **H(x)=x mod table size

**7. What is the correct notation for a load factor?**

a) ?

b) ?

c) ?

d) ?

**Answer: **?

**8. In hash tables, how many traversal of links does a successful search require?**

a) 1+?

b) 1+?2

c) 1+ (?/2)

d) ?3

**Answer: **1+ (?/2)

**9. Which of the following is a disadvantage of using separate chaining using linked lists?**

a) It requires many pointers

b) It requires linked lists

c) It uses array

d) It does not resolve collision

**Answer: **It requires many pointers

**10. What is the worst case search time of a hashing using separate chaining algorithm?**

a) O(N log N)

b) O(N)

c) O(N2)

d) O(N3)

**Answer: **O(N)