Memory Management MCQs

8 MCQs — Fundamental Programming MCQs

Practice Memory Management 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

In C++, where are local (automatic) variables and memory allocated with new typically stored?

Both on the heap
Locals on the heap; new on the stack
Locals on the stack; new on the heap (free store)
Both on the stack

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What happens when memory allocated with new in C++ is never released with delete?

Dangling pointer
Buffer overflow
Memory leak
Stack overflow

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In C++, what is the result of using delete p; on memory allocated with p = new int[10];?

Undefined behavior; delete[] p must be used
Compilation error
It frees only p[0]
It correctly frees all 10 ints

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What is wrong with this C++ function? int* f(){ int x = 5; return &x; }

Memory leak
Compilation error
Nothing; it works correctly
It returns a dangling pointer to a local variable that no longer exists

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How does CPython primarily manage memory?

Reference counting, plus a cyclic garbage collector
Manual free() calls
It never frees memory
Only a mark-and-sweep garbage collector

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Given int arr[5]; int *p = arr; with 4-byte ints, how many bytes does p + 2 advance from arr?

16 bytes
2 bytes
8 bytes
4 bytes

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What happens when a null pointer is dereferenced in C++?

A NullPointerException is thrown
Compilation error
The value 0 is returned
Undefined behavior (commonly a segmentation fault)

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What does C's malloc return when the requested memory cannot be allocated?

0xFFFFFFFF
NULL
It throws std::bad_alloc
It terminates the program

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