Type Conversion & Casting MCQs

11 MCQs — Data Types MCQs (Page 1 of 2)

Practice Type Conversion & Casting MCQs with correct answers and explanations. These questions are from the Data Types MCQs section.

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Data Types Subcategories

Arrays & Memory Layout	Characters & Strings
Floating Point	Integer Representation & Overflow
Number Systems & Literals	Pointers & References
Primitive Types & Sizes	Python Built-in Types
Structures, Unions & Enums	Type Conversion & Casting
Typing Disciplines & ADTs

What is int(-3.7) in Python?

-4
-3.7
-3
ValueError

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What is the value of (int)3.99 in C++?

4
Compilation error
3.99
3

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What does std::cout << 'A' + 1; print in C++?

B
A1
66
Compilation error

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In C++11, what happens with int x{3.5};?

Compilation error (narrowing conversion)
x = 3
x = 4
A warning only, and x = 3

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Which C++ cast checks at run time whether a downcast is valid, and requires a polymorphic base class?

dynamic_cast
static_cast
const_cast
reinterpret_cast

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What is bool("False") in Python?

True
ValueError
False
None

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What happens with "5" + 5 in Python?

TypeError
10
"55"
"10"

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In JavaScript, what are "5" + 2 and "5" - 2?

7 and "3"
7 and 3
"52" and 3
"52" and "3"

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Which statement about C++'s auto keyword (C++11) is correct?

The type is deduced at compile time, and the variable stays statically typed
Its type can change when a new value is assigned
It means automatic storage only, with no type deduction
It makes the variable dynamically typed, like Python

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What is the value of 7 / 2.0 in C++?

3.0
3
3.5
4

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