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Practice parsing, formatting, math and randomness through rule checks, diagnosis and submitted JavaScript programs. Half the pool consists of coding exercises with sample and hidden tests. Build a clear model of representation, validate boundaries and explain practical repairs.
Nov 10, 2026
Practice bigint and exact integer work through rule checks, diagnosis and submitted JavaScript programs. Half the pool consists of coding exercises with sample and hidden tests. Build a clear model of representation, validate boundaries and explain practical repairs.
Nov 10, 2026
Practice floating-point accuracy and safe integers through rule checks, diagnosis and submitted JavaScript programs. Half the pool consists of coding exercises with sample and hidden tests. Build a clear model of representation, validate boundaries and explain practical repairs.
Nov 10, 2026
Practice numbers, nan, infinity and signed zero through rule checks, diagnosis and submitted JavaScript programs. Half the pool consists of coding exercises with sample and hidden tests. Build a clear model of representation, validate boundaries and explain practical repairs.
Nov 10, 2026
Write and submit JavaScript solutions and practice reasoning about automatic semicolon insertion and grammar traps. 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 break, continue and nested control flow. 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 counted and condition-controlled loops. 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 switch, fallthrough and pattern choices. 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 nullish coalescing and optional chaining. 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 logical operators return values. 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 comparisons and branching. 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 arithmetic, assignment and evaluation order. Half the questions are coding exercises with sample and hidden tests; the remainder cover rules, diagnosis and transfer.
Nov 10, 2026
