Daily practice for placement tests

Rounds of ten, with the answer and an explanation right after each question. As many rounds as you like.

• DSA Complexity, arrays, stacks, trees, graphs and dynamic programming.
• Java Output questions, strings, collections, exceptions and the JVM.
• OOP Inheritance, polymorphism, SOLID principles and design patterns.
• DBMS and SQL Joins, normal forms, transactions, isolation and indexes.
• Operating systems Scheduling, memory, paging, deadlocks and processes.
• Computer networks TCP and UDP, subnets, HTTP, DNS and how a request travels.
• Aptitude Speed, work, percentages, probability and logical reasoning.
• Software engineering Git, REST APIs, testing, security and system design basics.