363 Courses in Sheffield delivered Live Online

Duration 5 Days 30 CPD hours This course is intended for This course is designed for IT professionals whose primary job responsibility is the management of servers and other devices running the Linux operating system. A typical student in this course should have at least nine months of hands-on Linux experience and at least one and a half years of IT experience in other computing environments. The target student should wish to expand their skillset to support their career in Linux system administration and operation. This course is also designed for students who are seeking the CompTIA Linux+ certification and who want to prepare for Exam XK0-005. The Linux+ certification can validate the student's understanding and skill in configuring, monitoring, and supporting Linux systems. Overview In this course, you will configure, operate, and troubleshoot Linux systems. You will: - Perform basic Linux tasks. - Manage users and groups. - Manage permissions and ownership. - Manage storage. - Manage files and directories. - Manage kernel modules. - Manage the Linux boot process. - Manage system components. - Manage devices. - Manage networking. - Manage packages and software. - Secure Linux systems. - Write and execute Bash shell scripts. - Automate tasks. - Plan and perform a Linux installation. The Official CompTIA© Linux+© courseware builds on your existing experience with systems operations and administration to provide you with the knowledge and skills required to configure, manage, operate, and troubleshoot a Linux environment by using security best practices, scripting, and automation. This course will also prepare you for the Exam XKO-005. 1 - PERFORMING BASIC LINUX TASKS Identify the History and Development of Linux Enter Shell Commands Get Help Using Linux 2 - MANAGING USERS AND GROUPS Assume Superuser Privileges Create, Modify, and Delete Users Create, Modify, and Delete Groups Query Users and Groups Configure Account Profiles 3 - MANAGING PERMISSIONS AND OWNERSHIP Modify File and Directory Permissions Modify File and Directory Ownership Configure Special Permissions and Attributes Troubleshoot Permissions Issues 4 - MANAGING STORAGE Create Partitions Manage Logical Volumes Mount File Systems Manage File Systems Navigate the Linux Directory Structure Troubleshoot Storage Issues 5 - MANAGING FILES AND DIRECTORIES Create and Edit Text Files Search for Files Perform Operations on Files and Directories Process Text Files Manipulate File Output 6 - MANAGING KERNEL MODULES Explore the Linux Kernel Install and Configure Kernel Modules Monitor Kernel Modules 7 - MANAGING THE LINUX BOOT PROCESS Configure Linux Boot Components Configure GRUB 2 8 - MANAGING SYSTEM COMPONENTS Configure Localization Options Configure GUIs Manage Services Troubleshoot Process Issues Troubleshoot CPU and Memory Issues 9 - MANAGING DEVICES Identify the Types of Linux Devices Configure Devices Monitor Devices Troubleshoot Hardware Issues 10 - MANAGING NETWORKING Identify TCP/IP Fundamentals Identify Linux Server Roles Connect to a Network Configure DHCP and DNS Client Services Configure Cloud and Virtualization Technologies Troubleshoot Networking Issues 11 - MANAGING PACKAGES AND SOFTWARE Identify Package Managers Manage RPM Packages with YUM Manage Debian Packages with APT Configure Repositories Acquire Software Build Software from Source Code Troubleshoot Software Dependency Issues 12 - SECURING LINUX SYSTEMS Implement Cybersecurity Best Practices Implement Identity and Access Management Methods Configure SELinux or AppArmor Configure Firewalls Implement Logging Services Back Up, Restore, and Verify Data 13 - WORKING WITH BASH SCRIPTS Customize the Bash Shell Environment Identify Scripting and Programming Fundamentals Write and Execute a Simple Bash Script Incorporate Control Statements in Bash Scripts 14 - AUTOMATING TASKS Schedule Jobs Implement Version Control Using Git Identify Orchestration Concepts 15 - INSTALLING LINUX Prepare for Linux Installation Perform the Installation Additional course details: Nexus Humans CompTIA Linux Plus Certification (Exam XK0-005) training program is a workshop that presents an invigorating mix of sessions, lessons, and masterclasses meticulously crafted to propel your learning expedition forward. This immersive bootcamp-style experience boasts interactive lectures, hands-on labs, and collaborative hackathons, all strategically designed to fortify fundamental concepts. Guided by seasoned coaches, each session offers priceless insights and practical skills crucial for honing your expertise. Whether you're stepping into the realm of professional skills or a seasoned professional, this comprehensive course ensures you're equipped with the knowledge and prowess necessary for success. While we feel this is the best course for the CompTIA Linux Plus Certification (Exam XK0-005) course and one of our Top 10 we encourage you to read the course outline to make sure it is the right content for you. Additionally, private sessions, closed classes or dedicated events are available both live online and at our training centres in Dublin and London, as well as at your offices anywhere in the UK, Ireland or across EMEA.

Duration 3 Days 18 CPD hours This course is intended for This advanced course is designed for those individuals who are responsible for operating and managing the operation of an IBM i system. Overview Explain the concept of how LPAR works Explain the functions served by the HMC Explain how user versus resource security are implemented Explain the difference between group profiles and authorization lists Describe how adopted authority works Describe how work is managed on the system and the concepts of the performance tuning process on the system Explain how Management Central can be used to manage a single system or a network of System i servers Perform the steps to create a basic CL program using both the traditional (PDM and SEU) and the newer GUI (RSE and LPEX) application development tools Perform the steps to create a menu using SDA Provide some tips on how you can improve your operations This course is designed to enhance the skills of an IBM i System Operator. This course explains the concept of how LPAR works and discusses the functions provided by the HMC LPAR concepts and overview . Console options and HMC overview . IASP concepts and overview . Security concepts and overview . System values . User security (user and group profiles) . Resource security . Authorization lists and adopted authority . Management Central overview . Commands and tasks using Management Central . Inventory using Management Central . System values using Management Central . Other Management Central functions . Work management: Concepts and overview . Work management: Subsystem concepts and overview . Work management: Job processing concepts and interactive jobs . Work management: Job processing concepts of other job types . Work management: Submitting and tracking of batch jobs . Programming concepts . CL programming concepts . Using PDM and SEU to create a CL program . Starting and setting up RSE . Creating a CL program using RSE and LPEX Editor . Creating a menu using SDA . Tips for improved operation .

About this training course Transmission lines and sub-stations are essential components in the electrical power systems. Proper design and maintenance are crucial for transmission lines to maintain a continuous operation. The objective of this 5-day training course is to deal appropriately with control systems, design characteristics and electric & magnetic fields. Participants will gain a better understanding on the corona and gap discharge phenomena, constructional features, and optimization of the transmission lines. Training Objectives By participating in this course, you will be able to: Understand transmission line design and its application Examine different types of conductors and electrical characteristics Explore basic and general transmission line parameters Prevent overvoltage through insulation design Determine surge impedance and corona effects Calculate and measure electric and magnetic fields Comprehend the impact of audible noise and electromagnetic interference Identify interference within the transmission line systems Target Audience The course will greatly benefit the following groups but not limited to: Electrical Engineers Civil Engineers Transmission & Distribution Engineers Substation Operators Safety Engineers Reliability Engineers Facility & Plant Engineers Technical Engineers Design Engineers Plant Supervisors Electrical Contractors Course Level Basic or Foundation Intermediate Training Methods The training instructor relies on a highly interactive training method to enhance the learning process. This method ensures that all participants gain a complete understanding of all the topics covered. The training environment is highly stimulating, challenging, and effective because the participants will learn by case studies which will allow them to apply the material taught in their own organization. Course Duration: 5 days in total (35 hours). Training Schedule 0830 - Registration 0900 - Start of training 1030 - Morning Break 1045 - Training recommences 1230 - Lunch Break 1330 - Training recommences 1515 - Evening break 1530 - Training recommences 1700 - End of Training The maximum number of participants allowed for this training course is 25. This course is also available through our Virtual Instructor Led Training (VILT) format. Trainer Your expert course leader is a professional engineer with extensive experience in power system studies, substation design field-testing, and EHS programs settings for Mining and Electrical Utilities sectors. He was formally the Engineering Manager at GE Canada in Ontario. He received his M.Sc. in electrical engineering from the University of New Brunswick and his MBA from Laurier School of Business in Waterloo. He has managed and executed more than 150 engineering projects on substation design EMF audits and power system studies and analyses, EMF audits and grounding audits, for major electrical utilities, mines, oil and gas, data centers, industrial and commercial facilities in Canada and the U.S. He is a certified professional engineer in the provinces of Ontario and Alberta. He has various IEEE publications, has served as a technical reviewer for many IEEE journals in power systems and control systems, and is the chair of the Industry Application Chapter (IAS) for IEEE Toronto Section. He remains a very active member for the IEEE substation committee of IEEE Std. 81 ground testing (WGE6) and IEEE Std. 80 ground design (WGD7). A certified electrical safety trainer by GE Corporate and a Canadian Standard Association (CSA) committee member at the mining advisory panel for electrical safety, he also taught many technical courses all over Canada to industrial customers, electrical consultants as well as to electrical utilities customers. Highlighted Projects: Various Power System Studies for 345/230 kV Stations - Nova Scotia Power (EMERA) RF audits for Telecom tower and antennas - Cogeco/Rogers Mobile Power System analysis - Powell Canada Structural/Geotechnical Design and upgrades - Oakville Hydro Underground Cables testing and sizing - Plan Group Relay programming and design optimization - Cenovus Canada Different Arc Flash Analysis and BESS Design - SNC Lavalin Environmental site assessment (ESA) Phase I/II for multiple stations - Ontario Electromagnetic compatibility (EMC) assessment for Toronto LRT expansion - MOSAIC Battery energy storage system (BESS) installation at City of London - Siemens Canada EMF audits for 500 kV Transmission Lines - Hydro One EMF audits for 500 kV Transmission Lines - Hydro Quebec AC interference for 138 kV line modeling and mitigations - HBMS Mine POST TRAINING COACHING SUPPORT (OPTIONAL) To further optimise your learning experience from our courses, we also offer individualized 'One to One' coaching support for 2 hours post training. We can help improve your competence in your chosen area of interest, based on your learning needs and available hours. This is a great opportunity to improve your capability and confidence in a particular area of expertise. It will be delivered over a secure video conference call by one of our senior trainers. They will work with you to create a tailor-made coaching program that will help you achieve your goals faster. Request for further information post training support and fees applicable Accreditions And Affliations

Duration 3 Days 18 CPD hours This course is intended for This course is geared for anyone needing to interface with an Oracle database such as end users, business analysts, application developers and database administrators / DBAs. Overview Working within in a hands-on learning environment, guided by our expert team, attendees will develop a practical approach to Oracle Database Technology. Throughout the course participants will explore: Using PL/SQL programming language for database applications and development incorporating PL/SQL modules within the application architecture from the initial design and planning phase The essentials of building executable PL/SQL program units Each of the major segments of a working program and how these interact with each other during program execution Important error or exception handling capabilities of the language. How database-resident program units can be used as part of the overall database application architecture Applying these new skills to the development of PL/SQL packages. Advanced database programming capabilities and benefits How database triggers can be used as part of an advanced database application design Oracle 19c PL/SQL Fundamentals is a three-day, hands-on course that introduces Oracle database programming using the PL/SQL programming language. Throughout the course students will explore the core syntax, structure and features of the language. This course will also lay the foundation for the entire Oracle PL/SQL programming series, allowing one to progress from introductory topics to advanced application design and programming and finally onto writing complex high-performance applications. The course also explores applying the newly learned skills to the development of database applications. Participants will learn how to use database-resident stored program units such as procedures, functions, packages and database triggers. Students will also learn about the latest features in Oracle 19c. Selection & Setup of the Database Interface Considering Available Tools Selecting the Appropriate Tool Oracle Net Database Connections Oracle PAAS Database Connections Setup SQL Developer Setup SQL *Plus Setup JDeveloper About BIND and Substitution Variables Using SQL Developer Using SQL *Plus Choosing a Database Programming Language What is Database Programming PL/SQL Programming PL/SQL Performance Advantages Integration with Other Languages PL/SQL Language Essentials PL/SQL Program Structure Language Syntax Rules Embedding SQL Writing Readable Code Generating Readable Code Generating Database Output SQL * Plus Input of Program Block DECLARE Section About the Declare Section Declare Primitive Types Declaration Options Not Null Constant Data Dictionary Integration % Type Declare Simple User-Defined Types Type ? Table Type ? Record Extended User Defined Types BEGIN Section About the Begin Section Manipulating Program Data Logic Control & Braching GOTO LOOP IF-THEN-ELSE CASE EXCEPTION Section About the Exception Section Isolating the Specific Exception Pragma Exception_INIT SQLCODE &SQLERRM Example SQL%ROWCOUNT & Select ? Into Beyond the Basics : Explicit Cursors About Explicit Cursors Extend Cursor Techniques For Update of Clause Where Current of Clause Using for ? Loop Cursors Introduction Database Resident Programming Units About Database ? Resident Programs Physical Storage & Execution Types of Stored Program Units Stored Program Unit Advantages Modular Design Principles Creating Stored Procedures and Functions Stored Procedures & Functions Create Procedure / Create Function Creating Procedures & Functions Raise_Salary() Procedure Salary_Valid() function The Parameter Specification Default Clause System & Object Privileges Using the Development Tools Executing Stored Procedures and Functions Calling Procedures & Functions Unit Testing with Execute Anonymous Block Unit Testing Specifying a Parameter Notation SQL Worksheet Unit Testing Calling Functions from SQL Maintaining Stored Programming Units Recompiling Programs Mass Recompilation Using UTL_RECOMP() Dropping Procedures & Functions Drop Procedures & Functions Drop Procedure / Function Data Dictionary Metadata Using USER_OBJECTS Using USER_SOURCE Using USER_ERRORS Using USER_OBJECT_SIZE Using USER_DEPENDENCIES Managing Dependencies Dependency Internals Tracking Dependencies The Dependency Tracking Utility SQL Developer Dependency Info Dependency Strategy Checklists Creating & Maintaining About Packages Creating Packages Maintaining Packages Performance Considerations Advanced Package Capabilities Definer & Invoker Rights White Lists & Accessible By Persistent Global Objects Defining Initilization Logic Object Orientation Support Advanced Cursor Techniques Using Cursor Variables Using SYS_REFCURSOR Using Cursor Expressions Using System Supplied Packages DBMS_OUTPUT() UTL_FILE() FOPEN() Example Database Trigger Concepts About Database Triggers DML Event Trigger Sub-Types Database Trigger Scenario Trigger Exhaustion Mechanisms Trigger within SQL Worksheet Creating Database Triggers Statement Level Triggers Using Raise Application_Error() Row-Level Triggers Examples of Triggers Employee_Salary_Check Example Employee_Journal Example Budget_Event Example Instead of Triggers Triggers within and Application Maintaining Database Triggers Call Syntax Trigger Maintenance Tasks Show Errors Trigger Drop Trigger Alter Trigger Multiple Triggers for a Table Handling Mutating Table Issues Implementing System Event Triggers What are System Event Triggers Defining the Scope Available System Events System Event Attributes

About this training course The smart meter or smart grid represents the next-generation electrical power system. This system uses information, data & communication technology within generation, delivery and consumption of electric energy. This 4-day course will equip you with the innovations that are shaping the power generation and distribution systems and will cover topics ranging from Smart Metering Architecture, Cybersecurity, Smart Grid Systems and Power Line Communications. Training Objectives By participating in this course, you will be able to: Comprehend the Smart Grid and Smart Meters architecture Review latest trends and challenges within the Smart Grid Technology Perform analysis on smart electronic meters Comply with regulatory and metering standards Recognize the importance of cybersecurity in smart grids Maximize efficiency, reliability, and longevity of your smart meters and equipment Gain valuable insights into power quality and harmonics Target Audience This course will greatly benefit the following groups but not limited to: Smart Grid managers and engineers Smart Meters managers and engineers Power plant managers Outage managers Maintenance and operations engineers Power regulatory personnel Transmission managers and engineers Distribution managers and engineers IT managers Renewable energy managers and engineers Course Level Basic or Foundation Intermediate Training Methods The training instructor relies on a highly interactive training method to enhance the learning process. This method ensures that all participants gain a complete understanding of all the topics covered. The training environment is highly stimulating, challenging, and effective because the participants will learn by case studies which will allow them to apply the material taught in their own organization. Course Duration: 4 days in total (28 hours). Training Schedule 0830 - Registration 0900 - Start of training 1030 - Morning Break 1045 - Training recommences 1230 - Lunch Break 1330 - Training recommences 1515 - Evening break 1530 - Training recommences 1700 - End of Training The maximum number of participants allowed for this training course is 25. This course is also available through our Virtual Instructor Led Training (VILT) format. Trainer Your expert course leader is a professional engineer with extensive experience in power system studies, substation design field-testing, and EHS programs settings for Mining and Electrical Utilities sectors. He was formally the Engineering Manager at GE Canada in Ontario. He received his M.Sc. in electrical engineering from the University of New Brunswick and his MBA from Laurier School of Business in Waterloo. He has managed and executed more than 150 engineering projects on substation design EMF audits and power system studies and analyses, EMF audits and grounding audits, for major electrical utilities, mines, oil and gas, data centers, industrial and commercial facilities in Canada and the U.S. He is a certified professional engineer in the provinces of Ontario and Alberta. He has various IEEE publications, has served as a technical reviewer for many IEEE journals in power systems and control systems, and is the chair of the Industry Application Chapter (IAS) for IEEE Toronto Section. He remains a very active member for the IEEE substation committee of IEEE Std. 81 ground testing (WGE6) and IEEE Std. 80 ground design (WGD7). A certified electrical safety trainer by GE Corporate and a Canadian Standard Association (CSA) committee member at the mining advisory panel for electrical safety, he also taught many technical courses all over Canada to industrial customers, electrical consultants as well as to electrical utilities customers. Highlighted Projects: Various Power System Studies for 345/230 kV Stations - Nova Scotia Power (EMERA) RF audits for Telecom tower and antennas - Cogeco/Rogers Mobile Power System analysis - Powell Canada Structural/Geotechnical Design and upgrades - Oakville Hydro Underground Cables testing and sizing - Plan Group Relay programming and design optimization - Cenovus Canada Different Arc Flash Analysis and BESS Design - SNC Lavalin Environmental site assessment (ESA) Phase I/II for multiple stations - Ontario Electromagnetic compatibility (EMC) assessment for Toronto LRT expansion - MOSAIC Battery energy storage system (BESS) installation at City of London - Siemens Canada EMF audits for 500 kV Transmission Lines - Hydro One EMF audits for 500 kV Transmission Lines - Hydro Quebec AC interference for 138 kV line modeling and mitigations - HBMS Mine POST TRAINING COACHING SUPPORT (OPTIONAL) To further optimise your learning experience from our courses, we also offer individualized 'One to One' coaching support for 2 hours post training. We can help improve your competence in your chosen area of interest, based on your learning needs and available hours. This is a great opportunity to improve your capability and confidence in a particular area of expertise. It will be delivered over a secure video conference call by one of our senior trainers. They will work with you to create a tailor-made coaching program that will help you achieve your goals faster. Request for further information post training support and fees applicable Accreditions And Affliations

Duration 4.375 Days 26.25 CPD hours This course is intended for The target audience for this course is all Oracle professionals. Among the specific groups for whom this course will be helpful are: Application designers and database developers Database administrators Web server administrators Overview This eTextbook begins with an explanation of the intent and usage of the PL/SQL programming language for database applications. Important reasons why one should incorporate PL/SQL modules within the application architecture right from the initial design and planning phase are presented. Next one learns how to begin building executable PL/SQL program units. One learns about each of the major segments of a working program and how these interact with each other during program execution, including the important error or exception handling capabilities of the language. The final section goes beyond the basics and begins to explore advanced topics that will be useful later in the Sideris Oracle PL/SQL developer textbook series. One learns techniques and features that allow modular and reusable programs to be developed, increasing productivity and maintainability of database applications. his eTextbook introduces one to Oracle database programming using the PL/SQL programming language. One will learn the syntax, structure and features of the language. This textbook will also lay the foundation for the entire Sideris Oracle PL/SQL programming series, allowing one to progress from introductory topics to advanced application design and programming and finally onto writing complex high-performance applications. his eTextbook introduces one to Oracle database programming using the PL/SQL programming language. One will learn the syntax, structure and features of the language. This textbook will also lay the foundation for the entire Sideris Oracle PL/SQL programming series, allowing one to progress from introductory topics to advanced application design and programming and finally onto writing complex high-performance applications.

REXX training course description A hands on training course covering the Restructured EXtended eXecutor (REXX) language. A large number of exercises are used to reinforce and emphasise lecture sessions. What will you learn Write REXX programs. Debug REXX programs. Examine existing code and determine its function. REXX training course details Who will benefit: Anyone wishing to learn REXX. Prerequisites: None although experience in another high level language would be useful. Duration 3 days REXX training course contents Introduction to REXX What is REXX? REXX environments, invoking a REXX exec, a sample REXX exec, REXX clause types. REXX variables and data Literal data, variable data, assignment, simple variables, compound variables, stem variables, constant data, numeric data, arithmetic operations, character manipulation, hexadecimal data. The parse instruction Parse format, Parse examples, Parse arg, Parse pull, Parse value, special templates, place holders, literal templates, numeric templates, variable templates. Control structures Relational conditions, logical operators, simple selection, looping: uncontrolled and controlled loops, infinite loops, conditional loops, controlling loops, leave, iterate, multiple selection, instructions for subroutines, exit. Sub routines and functions Internal and external subroutines, call, ARG(), ARG(n)return, exit, scope of variables, procedure, functions, built in functions, overriding built in functions. Performing I/O Command conventions, preparing to read a file, execio, limitations, execio for reading, DISKR, DISKRU, DISKW, return codes. External functions listdsi, msg, outtrap, prompt, sysdsn, sysvar, storage Tracing Immediate commands, the trace facility, signal and call statements. Built in functions Text handling functions, string handling, word handling, arithmetic, data conversion, bit manipulation, environment. The data stack Data stack structure, REXX instructions for the data stack, REXX functions for the data stack, TSO/E commands for the data stack. REXX in batch TSO/E foreground. TSO/E background.

Learn the essentials of software development. And increase your confidence when working with developers. Why take this course? Talk with confidence about web and internet technologies Build better relationships with developers on your team Create smarter designs with a deeper understanding of technical constraints Understand the concepts behind coding without needing to code Who is it for? All UX professionals Format Online, self-paced Duration 6 weeks (recommended) Commitment 3 hours per week What you’ll learn Over 6 weeks, you’ll learn about the key concepts and processes involved in software development. You'll understand how code works, so that you can collaborate more effectively with developers. Module 1 The software landscape Understand the relationship between hardware and software. Module 2 Layers of software Dig into each layer of the tech stack, from the front-end to the back-end. Module 3 Front-end technologies Get up to speed on the roles of HTML, CSS and Javascript. Module 4 Back-end technologies Explore the back-end, APIs and common programming languages. Module 5 How developers work Learn about common development workflows, from waterfall to agile. Module 6 Effective collaboration Get practical guidance on how to work well with development teams.

Duration 4 Days 24 CPD hours This course is intended for If you want to advance from being a front-end developer to a full-stack developer and learn how Node.js can be used for hosting full-stack applications, this course is for you. Knowledge of JavaScript's basic syntax and experience with popular front-end libraries such as jQuery is required. You should also have used JavaScript with HTML and CSS, but not necessarily Node.js. Overview By the end of this course, you'll have the skills you need to tackle any real-world JavaScript development problem using a modern JavaScript approach, both for client and server sides.After completing this course, you will be able to: Apply the core concepts of functional programming Build a Node.js project that uses the Express.js library to host an API Create unit tests for a Node.js project to validate it Use the Cheerio library with Node.js to create a basic web scraper Develop a React interface to build processing flows Use callbacks as a basic way to bring control back This is your one-stop solution to mastering modern JavaScript. This course covers the latest features of JavaScript and advanced concepts, such as modularity, testing, and asynchronous programming. By the end of the course, you?ll know how to create a full-stack JavaScript application using NodeJS and how to use JavaScript in functional programming. JavaScript, HTML, and the DOM HTML and the DOM Developer Tools Node.js and npm What is Node.js? Node Version Manager (nvm) Node Package Manager (npm) Node.js APIs and Web Scraping Globals FileSystem APIs HTTP APIs What is Scraping? RESTful APIs with Node.js What is an API? What is REST? Useful Defaults and Easy Inputs Middleware The Contents of a JWT MongoDB Modular JavaScript ES6 Modules Object-Oriented Programming (OOP) npm Package? Code Quality Clear Naming Unit Tests Integration Tests End-to-End Testing Puppeteer Advanced JavaScript Language Features Supported in ES5, ES6, ES7, ES8, and ES9 OOP in JavaScript Sorting Maps and Sets Math, Date, and String Symbols, Iterators, Generators, and Proxies Asynchronous Programming Callback Hell Async and Await Event-Driven Programming and Built-In Modules Eventing Node.js Built-In Modules Handling Large Files in Node.js Functional Programming with JavaScript Functions ? First-Class Citizens Pure Functions Higher-Order Functions Function Composition Immutability and Side Effects Introduction to GraphQL Language Schemas and Queries