SQL-01 1️⃣ SELECT Statement (Basic Query) ✅ Definition SELECT is used to retrieve data from a table. ✅ Syntax SELECT column_name FROM table_name; ✅ Select All Columns SELECT * FROM client_master; ✅ Select Mar 2 · 4 min readgdcademy-dsa.hashnode.dev
COMPLETE TREE DATA STRUCTURE NOTESPART 1: INTRODUCTION TO TREES 1.1 What is a Tree? A tree is a hierarchical data structure consisting of nodes connected by edges. Unlike arrays, linked lists, stacks, and queues which are linear, treeFeb 21 · 32 min readgdcademy-dsa.hashnode.dev
Tree DSA Top 20 Predicted Questions for WBUT 2026 ExaminationQuestion 1: Binary Tree Properties Prove that for any non-empty binary tree, number of leaf nodes (n₀) = number of nodes with degree 2 (n₂) + 1. Easy Answer: Step-by-Step Proof: Let's understand the tFeb 21 · 43 min readgdcademy-dsa.hashnode.dev
Tree Data Structure - Complete Question Bank with AnswersSHORT ANSWER TYPE QUESTIONS Question 1: Expression Tree Construction Construct the expression tree for the following expression: [WBUT 2010] E = (2a + 5b)(x - 7y)^4 Answer: An expression tree is a biFeb 21 · 101 min readgdcademy-dsa.hashnode.dev
Tree Data Structure - Question BankMultiple Choice Questions Threaded Binary Tree: If a binary tree is threaded for in-order traversal a right NULL link of any node is replaced by the address of its [WBUT 2007, 2016]a) successor ✓ b) Feb 19 · 14 min readgdcademy-dsa.hashnode.dev
