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Free online wide MCQ Exam for "Data Structure"

459+ questions to prepare...

Data Structure

About Data Structure

This set covers Arrays, Linked Lists, Stacks, Queues, Trees, Graphs, Hashing, Recursion, and Basic Algorithms.Advanced Algorithms, Dynamic Programming, Graph Theory, specialized Trees, and Complexity Theory.

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Data Structures are essential for organizing and storing data efficiently, enabling faster data processing, retrieval, and optimized algorithm performance.

A Stack follows the Last-In-First-Out (LIFO) principle, whereas a Queue follows the First-In-First-Out (FIFO) principle for data processing.

Linear structures (Arrays, Linked Lists) store elements sequentially, while Non-Linear structures (Trees, Graphs) store elements hierarchically.

A BST is a tree where each node has at most two children, with the left child containing a smaller value and the right child a larger value.

In an ideal scenario with a good hash function, the average time complexity for searching in a Hash Table is O(1).

Recursion is a programming technique where a function calls itself to solve smaller sub-problems of the same type.

An array has a fixed size and contiguous memory, while a linked list is dynamic and consists of nodes pointing to the next element in memory.

A Min-Heap is a complete binary tree where the value of each node is greater than or equal to the value of its parent (root is the minimum).

In-order traversal visits nodes in the order: Left Subtree -> Root -> Right Subtree, resulting in sorted order for a BST.

The Stack is used for static memory allocation (local variables), while the Heap is used for dynamic memory allocation at runtime.

BFS (Breadth-First Search) explores neighbors level by level, while DFS (Depth-First Search) goes as deep as possible before backtracking.

A Trie (Prefix Tree) is an efficient information retrieval data structure used for storing strings and performing prefix-based searches.

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