Variables & Scope MCQs

12 MCQs — Fundamental Programming MCQs (Page 1 of 2)

Practice Variables & Scope MCQs with correct answers and explanations. These questions are from the Fundamental Programming MCQs section.

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Fundamental Programming Subcategories

Control Structures	Errors & Exceptions
Functions & Parameter Passing	Memory Management
Object-Oriented Concepts	Operators & Expressions
Programming Paradigms	Recursion
Translation & Execution	Variables & Scope

What is the output of this Python code? x = 10 def f(): print(x) x = 5 f()

UnboundLocalError is raised
None
10
5

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What is the output of this C++ code? int f(){ static int c = 0; return ++c; } int main(){ f(); f(); cout << f(); }

1
0
3
Compilation error

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What is the value of an uninitialized local (automatic) int variable in C++?

Indeterminate (garbage); reading it is undefined behavior
INT_MIN
Always -1
Always 0

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What is the value of a global int variable declared without an initializer in C++?

Compilation error
1
0
Garbage value

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What are the scope and lifetime of a static local variable declared inside a C++ function?

Block scope and a lifetime of one function call
Block scope, but a lifetime equal to the whole program run
Global scope and program lifetime
File scope and a lifetime of one function call

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What does this Python code print? fs = [lambda: i for i in range(3)] print([f() for f in fs])

NameError
[0, 1, 2]
[2, 2, 2]
[0, 0, 0]

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Which keyword lets a Python function assign a new value to a module-level variable?

nonlocal
static
global
extern

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What does this C++ code print? int x = 1; { int x = 2; x++; } cout << x;

3
2
1
Compilation error: redeclaration of x

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What does this Python code print? a = [1, 2] b = a b.append(3) print(a)

Error
[3]
[1, 2]
[1, 2, 3]

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What does this Python code print? def f(x, L=[]): L.append(x) return L f(1) print(f(2))

[[1], 2]
[1, 2]
[1]
[2]

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