Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Chapter: 38
Q601:
What type of array maintains data in a sorted order?
A. Unsorted Sequential Array
B. Sorted Sequential Array
C. Hash Table
D. Linked List
Correct Answer:
B
Chapter: 38
Q602:
In a table, what term is used for the unique identifier for each entry?
A. Field
B. Record
C. Key
D. Value
Correct Answer:
C
Chapter: 38
Q603:
How does binary search improve performance compared to linear search in a sorted array?
A. By reducing the number of comparisons
B. By increasing the number of comparisons
C. By using hash functions
D. By directly accessing the data
Correct Answer:
A
Chapter: 38
Q604:
What is the key feature of the unsorted sequential array implementation?
A. Fast insertion and slow searching
B. Slow insertion and fast searching
C. Fast sorting of data
D. Immediate access to any record
Correct Answer:
A
Chapter: 38
Q605:
Which operation in a sorted array requires shifting of elements to maintain order?
A. Insert
B. Find
C. Remove
D. Update
Correct Answer:
A
Chapter: 38
Q606:
How does a dictionary differ from a traditional table in programming?
A. It stores data in a tabular format
B. It associates keys with values
C. It requires a fixed size
D. It only supports numerical data
Correct Answer:
B
Chapter: 38
Q607:
What does a table record or tuple represent?
A. A single field
B. A collection of fields
C. A key-value pair
D. An operation on data
Correct Answer:
B
Chapter: 38
Q608:
In the context of Table ADT, what is the typical complexity of the remove operation?
A. O(1)
B. O(n)
C. O(log n)
D. O(n log n)
Correct Answer:
B
Chapter: 38
Q609:
What does the "find" method do in the context of a table ADT?
A. Deletes a record from the table
B. Finds a record associated with a key
C. Inserts a new record into the table
D. Updates an existing record
Correct Answer:
B
Chapter: 38
Q610:
What does the term "tuple" refer to in database terminology?
A. A column in a table
B. A row in a table
C. A field in a record
D. A key in a table
Correct Answer:
B
Chapter: 39
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
Correct Answer:
B
Chapter: 39
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
Correct Answer:
B
Chapter: 39
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
Correct Answer:
B
Chapter: 39
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)
Correct Answer:
B
Chapter: 39
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
Correct Answer:
B
Chapter: 40
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
Correct Answer:
B
Chapter: 40
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
Correct Answer:
C
Chapter: 40
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
Correct Answer:
B
Chapter: 40
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
Correct Answer:
B
Chapter: 40
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
Correct Answer:
C