Welcome to Data Structures and Abstractions with Java uCertify Labs Data Structures and Abstractions with Java uCertify Labs is an online, hands-on skills enhancement tool that helps students master the processes, patterns, and strategies needed to build effective learning systems. The 70+ labs in this product introduces and covers the core concepts of Data Structures and Abstractions with Java in a friendly way. The award-winning, uCertify Labs help bridge the gap between conceptual knowledge and real-world application by providing, competency-based, interactive, online, 24x7 training. uCertify Labs simulate real-world networking hardware, software applications and operating systems, and command line interfaces. uCertify Labs build upon the same great platform benefits and flexibility that have become synonymous with the uCertify Courses. Students can feel safe working in this virtual environment resolving real-world operating system and hardware problems. You can plan your studies using Study Planner and use one of the three available study modes--Test, Learn or Review to suit your learning style.