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Practice complex scope, hoisting, and declaration diagnostics through debugging and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Practice parameter scope separation, catch bindings, and dynamic evaluation through diagnosis and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Practice loop bindings, per-iteration environments, and closure capture through diagnosis and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Practice lexical shadowing, syntax errors, and redeclaration rules through diagnosis and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Practice let, const, class declarations, and the temporal dead zone through diagnosis and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Practice var hoisting, declaration lifecycles, and function initialization through diagnosis and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Practice function, block, and global scope boundaries through diagnosis and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Practice lexical scope, identifier lookup, and nested environment resolution through diagnosis and submitted JavaScript code. Half the pool consists of coding exercises with sample and hidden tests.
Nov 10, 2026
Write and submit JavaScript solutions and practice reasoning about receiver and construction diagnostic lab. Half the questions are coding exercises with sample and hidden tests; the remainder cover rules, diagnosis and transfer.
Nov 10, 2026
Write and submit JavaScript solutions and practice reasoning about borrowed methods and built-in brand checks. Half the questions are coding exercises with sample and hidden tests; the remainder cover rules, diagnosis and transfer.
Nov 10, 2026
Write and submit JavaScript solutions and practice reasoning about new.target, bound constructors and reflect.construct. Half the questions are coding exercises with sample and hidden tests; the remainder cover rules, diagnosis and transfer.
Nov 10, 2026
Write and submit JavaScript solutions and practice reasoning about the new operator step by step. Half the questions are coding exercises with sample and hidden tests; the remainder cover rules, diagnosis and transfer.
Nov 10, 2026
