15 Handling Effects questions from the Functional Programming bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
B.a container that models an optional value as either present with content or empty, avoiding null references
C.a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects
D.any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
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2. Which term means: "any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure"?
Mid
A.Either type
B.Functor
C.IO monad
D.Maybe type
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3. Which statement is correct?
Mid
A.Functor — a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
B.Functor — any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
C.Functor — a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects
D.Functor — a container that models an optional value as either present with content or empty, avoiding null references
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4. What is Monad?
Senior
A.a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
B.a container that models an optional value as either present with content or empty, avoiding null references
C.any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
D.a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects
Answer + AI explanation with Pro
5. Which term means: "a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects"?
Senior
A.Either type
B.Maybe type
C.Monad
D.IO monad
Answer + AI explanation with Pro
6. Which statement is correct?
Senior
A.Monad — a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
B.Monad — any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
C.Monad — a container that models an optional value as either present with content or empty, avoiding null references
D.Monad — a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects
Answer + AI explanation with Pro
7. What is Maybe type?
Mid
A.a container that models an optional value as either present with content or empty, avoiding null references
B.a container that holds one of two possibilities, conventionally a success value or a failure value, for error handling without exceptions
C.a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
D.any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
Answer + AI explanation with Pro
8. Which term means: "a container that models an optional value as either present with content or empty, avoiding null references"?
Mid
A.Maybe type
B.Monad
C.Functor
D.Either type
Answer + AI explanation with Pro
9. Which statement is correct?
Mid
A.Maybe type — a container that models an optional value as either present with content or empty, avoiding null references
B.Maybe type — any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
C.Maybe type — a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects
D.Maybe type — a container that holds one of two possibilities, conventionally a success value or a failure value, for error handling without exceptions
Answer + AI explanation with Pro
10. What is Either type?
Mid
A.a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects
B.any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
C.a container that holds one of two possibilities, conventionally a success value or a failure value, for error handling without exceptions
D.a container that models an optional value as either present with content or empty, avoiding null references
Answer + AI explanation with Pro
11. Which term means: "a container that holds one of two possibilities, conventionally a success value or a failure value, for error handling without exceptions"?
Mid
A.IO monad
B.Either type
C.Monad
D.Functor
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
A.Either type — a container that holds one of two possibilities, conventionally a success value or a failure value, for error handling without exceptions
B.Either type — a container that models an optional value as either present with content or empty, avoiding null references
C.Either type — a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
D.Either type — any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
Answer + AI explanation with Pro
13. What is IO monad?
Senior
A.any container type that provides a mapping operation to apply a routine to its wrapped value while preserving its structure
B.a container that models an optional value as either present with content or empty, avoiding null references
C.a container that holds one of two possibilities, conventionally a success value or a failure value, for error handling without exceptions
D.a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
Answer + AI explanation with Pro
14. Which term means: "a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent"?
Senior
A.IO monad
B.Either type
C.Maybe type
D.Functor
Answer + AI explanation with Pro
15. Which statement is correct?
Senior
A.IO monad — a container that models an optional value as either present with content or empty, avoiding null references
B.IO monad — a container that holds one of two possibilities, conventionally a success value or a failure value, for error handling without exceptions
C.IO monad — a container type with a way to wrap a plain value and a way to chain operations that each return another wrapped value, used to sequence effects
D.IO monad — a wrapper that describes a side-effecting action as a value to be run later, keeping the rest of the code referentially transparent
Answer + AI explanation with Pro
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