Function Additional Practice Test — Class 12 Computer Science

12th Standard Computer Science — Function: Additional Online Practice Test

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Which of the following is true about definitions in function specifications?

A.Definitions are expressions. B.Expressions are treated as definitions. C.Definitions are distinct syntactic blocks. D.Definitions cannot have nested expressions.

What does the type signature x1 -> x2 -> y indicate in function types?

A.A function that takes one input of type x1 and returns x2 and y. B.A function that takes two inputs of types x1 and x2, and returns an output of type y. C.A function that takes an input of type y and maps it to x1 and x2. D.A recursive function with two base cases of types x1 and x2.

When writing explicit type annotations for parameters in a function definition, which of the following is mandatory?

A.Square brackets [ ] B.Curly braces { } C.Parentheses ( ) D.Angle brackets < >

Which keyword must accompany let to define a recursive function?

A.recur B.rec C.repeat D.loop

Why is the function strlen considered a pure function in programming?

A.It modifies the string passed to it during execution. B.It returns a random value each time it is called. C.It only reads the external memory of the string to find its length without modifying it. D.It depends on global variables that change dynamically.

If a compiler compiles a loop containing several calls to a pure function like strlen(s) where s is not updated, what optimization can a smart compiler perform?

A.Convert the pure function into an impure function. B.Force the loop to run indefinitely. C.Remove redundant calls and execute the function only once. D.Ignore the function call completely.

Which of the following is an example of a side effect that makes a function impure?

A.Returning the square of an input integer. B.Calculating the greatest common divisor of two numbers. C.Modifying a variable that resides outside the function's scope. D.Performing a mathematical sine calculation on a constant value.

In the Chameleons of Chromeland problem, if the initial numbers of chameleons of types A, B, and C are 4, 4, and 6 respectively, what is the final number of chameleons of the third type after all have been monochromatized?

A.10 B.12 C.14 D.8

Which of the following statements is true regarding function definitions in the context of the textbook?

A.Functions can be defined both statically and dynamically. B.All functions are static definitions, and there are no dynamic function definitions. C.Recursive functions are always dynamic definitions. D.Functions can only be defined inside other functions dynamically.

Q10

In Object-Oriented Programming, how do we refer to the template that specifies the interfaces to enable an object to be created and operated?

A.Subroutine template B.Class template C.Syntactic block D.Parameter specification

Q11

In the recursive definition of the greatest common divisor: let rec gcd a b := if b <> 0 then gcd b (a mod b) else return a, which statement or part handles the termination of the recursion?

A.let rec gcd a b B.then gcd b (a mod b) C.if b <> 0 D.else return a

Q12

What does the term "wishful thinking" refer to in the strategy of designing programs?

A.Delaying the coding of the entire program until the final exam. B.Assuming the existence of constructors and selectors before defining their concrete implementation. C.Hoping that the compiler will automatically fix syntax errors without debugging. D.Expecting an impure function to behave like a pure function.

Q13

Consider the following code segment: y := 0 let inc (x: int): int := y := y + x return (y) What is the side effect of calling the inc function?

A.It returns an incorrect integer sum. B.It requires mandatory parentheses for type annotations. C.It changes the value of the externally visible variable y. D.It recursively calls itself until y is zero.

Q14

Which of the following is true about pure and impure functions regarding their argument modification?

A.Pure functions modify the arguments passed to them, whereas impure functions do not. B.Neither pure nor impure functions can modify arguments. C.Both pure and impure functions must modify their arguments. D.Pure functions do not modify their arguments, while impure functions may modify them.

Q15

What happens when a function depends on variables or functions defined outside of its own definition block?

A.It is guaranteed to be a pure function. B.It can never be sure to behave the same way every time it is called. C.It will cause a compilation error due to type inference. D.It is automatically optimized by the compiler to execute once.

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About this Function test

This free online practice test covers Function from the 12th Standard Computer Science (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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