stack queue array and linked list linear data structure
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stack queue array and linked list linear data structure
Focus on the four core linear data structures: arrays, linked lists, stacks, and queues. For each, know the definition, basic operations (insert, delete, traverse, search), and their time complexities. Understand the dif...
Sample questions with model answers
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Write a complete program (or pseudo-code) to reverse a string using a stack.
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Push each character onto the stack, then pop all characters to form the reversed string.
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Compare stack and queue with respect to order, operations, and applications.
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Stack: LIFO, push/pop, used in recursion. Queue: FIFO, enqueue/dequeue, used in scheduling.
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Describe the process of inserting a node at the beginning of a singly linked list.
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Create a new node, set its next to the current head, then update head to point to the new node.
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Describe the process of deleting a node from the end of a singly linked list.
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Traverse to the second-last node, set its next to null, and free the last node.
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