How does a circular queue determine if it is full?
A separate variable keeps track of the number of elements
Rear pointer reaches the end of the array
Front pointer is one position behind the rear pointer (considering wrapping)
Front pointer equals rear pointer
In the context of Breadth-First Search (BFS), how does a queue help explore a graph?
It stores the path from the source node to the current node.
It ensures that nodes are visited in a depth-first manner.
It maintains a list of visited nodes to prevent cycles.
It facilitates visiting all neighbors of a node before moving to the next level.
You are designing a system where elements are added and removed from both ends. Which data structure is the most suitable?
Deque
Binary Tree
Queue
Stack
How can you prevent a queue implemented using a linked list from encountering an overflow condition?
Use a circular linked list
Use a fixed-size array instead of a linked list
Implement a check for available memory before each enqueue operation
Linked list implementation inherently prevents overflow
Which of the following situations is MOST likely to benefit from using a priority queue?
Performing a breadth-first search in a graph
Storing a collection of sorted integers
Managing tasks based on their urgency level
Implementing a Last-In-First-Out (LIFO) data structure
What is the time complexity of inserting an element into a priority queue implemented using a binary heap (in the average case)?
O(n)
O(log n)
O(n log n)
O(1)
How does a queue ensure that elements are processed in the order they were added?
By dynamically allocating memory for each element.
By using a Last-In, First-Out (LIFO) approach.
By using a First-In, First-Out (FIFO) approach.
By using a hash function to index elements.
In a circular queue implemented using an array, what is the purpose of the rear pointer?
To mark the beginning of the queue in the circular array.
To indicate the next available position for enqueuing an element.
To track the number of elements currently present in the queue.
To point to the element that was most recently enqueued.
You need to implement a queue using two stacks. What is the time complexity of the dequeue operation in the worst-case scenario?
Which data structure is commonly used to implement a priority queue where efficient insertion and removal of the highest-priority element are crucial?
Doubly Linked List
Binary Search Tree
Hash Table
Binary Heap