Data Structures in C

Explain the array implementation in C.

• Arrays in C can dynamically resize based on the number of elements

• Arrays in C are implemented as a linked list

• Arrays in C are implemented as a contiguous block of memory where elements are stored sequentially. Elements can be accessed using index notation starting from 0.

• Elements in arrays can only be accessed using pointers in C

How are pointers manipulated in C?

• By comparing with == and != operators.

• By multiplying with * and dividing with / operators.

• By using ++ and -- operators.

• By dereferencing with * and getting memory address with & operators.

Discuss the implementation of a queue in C.

• You can implement a queue in C using either an array or a linked list.

• You can implement a queue in C using a binary tree

• You can implement a queue in C using a stack

• You can implement a queue in C using a hash table

How do you create a linked list in C?

• Define a structure for the nodes, allocate memory for each node, and maintain a pointer to the head of the list.

• Define a structure for the nodes, link the nodes together, and maintain a pointer to the head of the list.

• Define a structure for the nodes, allocate memory for each node, link the nodes together, and maintain a pointer to the head of the list.

• Allocate memory for each node, link the nodes together, and maintain a pointer to the head of the list.

Explain the concept of a circular queue in C.

• A circular queue in C does not allow for dynamic resizing of the underlying array

• In C, a circular queue can be implemented using an array and two pointers to keep track of the front and rear elements. When enqueuing, the rear pointer is incremented, and when dequeuing, the front pointer is incremented. If the pointers reach the end of the array, they wrap around to the beginning to maintain the circular nature of the queue.

• In a circular queue, the front pointer is always incremented first before the rear pointer

• A circular queue in C is implemented using a linked list instead of an array

Provide an example application of a stack.

• Queue management in a restaurant

• FIFO scheduling in operating systems

• Binary search algorithm

• Undo feature in text editors

Give an example of an application of a queue.

• Storing data in a hash table

• Controlling access to a secure database

• Managing print jobs in a printer spooler system

• Managing customer orders in a restaurant

Define Big O notation in the context of data structures.

• Big O notation is used to represent the worst-case time complexity of an algorithm or data structure.

• Big O notation is used to represent the space complexity of an algorithm or data structure.

• Big O notation is used to represent the average-case time complexity of an algorithm or data structure.

• Big O notation is used to represent the best-case time complexity of an algorithm or data structure.

What is the time complexity of stack operations?

• O(n^2)

• O(log n)

• O(1)

• O(n)

What is the time complexity of queue operations?

• O(1)

• O(n^2)

• O(log n)

• O(n)