Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Multiple Choice Questions
Q611: What does binary search primarily require for it to function correctly?
- A: Unsorted data
- B: A sorted array
- C: Unsorted linked list
- D: A binary tree
View Answer
B
Q612: In the binary search algorithm, what is the next step if the value to be found is greater than the middle element?
- A: Search the left half of the array
- B: Search the right half of the array
- C: Terminate the search
- D: Recalculate the middle element
View Answer
B
Q613: In Binary Search Example 2, if val is 19 and a[mid] is 10, what is the new low value after the comparison?
- A: 4
- B: 5
- C: 6
- D: 7
View Answer
B
Q614: What does the efficiency analysis of binary search show about the maximum number of comparisons needed?
- A: O(N)
- B: O(log N)
- C: O(N^2)
- D: O(1)
View Answer
B
Q615: In the skip list structure, what does the level i chain include?
- A: All elements in the list
- B: Every 2^i elements
- C: Every 2^i/2 elements
- D: Every element with value i
View Answer
B
Q616: What is a key characteristic of skip lists?
- A: They are based on trees
- B: They use additional pointers to enhance search speed
- C: They require data to be sorted in ascending order
- D: They are implemented using arrays
View Answer
B
Q617: In a skip list, what does each list Si contain?
- A: Only special keys
- B: All keys of the list S0
- C: Subsequence of the list S0
- D: A sorted array of data items
View Answer
C
Q618: What happens if the value to be inserted into a skip list has i greater than h?
- A: No new lists are added
- B: The new lists are added up to Si+1
- C: Only the list Sh is updated
- D: The list is directly inserted into the top list
View Answer
B
Q619: In the skip list search algorithm, if x < y at a current position, what is the next step?
- A: Scan forward
- B: Drop down to the next list
- C: Return the current element
- D: Move to the next node in the same list
View Answer
B
Q620: During the insertion process in a skip list, if i equals h, what happens next?
- A: The new lists are not added
- B: The list S0 is updated
- C: The item is inserted into the existing lists
- D: Only the top-most list is updated
View Answer
C