1. What is constexpr ? Mid A. a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data B. a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions C. a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement D. a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation
2. Which term means: "a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions"? Mid A. constexpr B. std::optional C. std::span D. Structured bindings
3. Which statement is correct? Mid A. constexpr — a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions B. constexpr — a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data C. constexpr — a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation D. constexpr — a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement
4. What is Structured bindings ? Mid A. a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions B. a wrapper that either contains a value or is empty, expressing a possibly-absent result without resorting to sentinels or pointers C. a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data D. a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement
5. Which term means: "a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement"? Mid A. constexpr B. Structured bindings C. std::optional D. std::variant
6. Which statement is correct? Mid A. Structured bindings — a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions B. Structured bindings — a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement C. Structured bindings — a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data D. Structured bindings — a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation
7. What is std::optional ? Mid A. a wrapper that either contains a value or is empty, expressing a possibly-absent result without resorting to sentinels or pointers B. a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data C. a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions D. a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation
8. Which term means: "a wrapper that either contains a value or is empty, expressing a possibly-absent result without resorting to sentinels or pointers"? Mid A. Structured bindings B. std::optional C. std::span D. constexpr
9. Which statement is correct? Mid A. std::optional — a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions B. std::optional — a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation C. std::optional — a wrapper that either contains a value or is empty, expressing a possibly-absent result without resorting to sentinels or pointers D. std::optional — a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data
10. What is std::variant ? Senior A. a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data B. a wrapper that either contains a value or is empty, expressing a possibly-absent result without resorting to sentinels or pointers C. a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement D. a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation
11. Which term means: "a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation"? Senior A. Structured bindings B. std::variant C. std::optional D. std::span
12. Which statement is correct? Senior A. std::variant — a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement B. std::variant — a wrapper that either contains a value or is empty, expressing a possibly-absent result without resorting to sentinels or pointers C. std::variant — a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation D. std::variant — a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data
13. What is std::span ? Senior A. a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation B. a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data C. a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement D. a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions
14. Which term means: "a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data"? Senior A. std::span B. Structured bindings C. constexpr D. std::optional
15. Which statement is correct? Senior A. std::span — a C++17 declaration that unpacks a tuple, pair, array, or struct into several named variables in one statement B. std::span — a non-owning lightweight view over a contiguous sequence of elements, carrying a pointer and length without copying the data C. std::span — a type-safe tagged union holding exactly one value from a fixed set of alternative types, accessed via visitation D. std::span — a specifier marking a function or variable as evaluable at compile time, allowing its result to be used in constant expressions