Arrays & Memory Layout MCQs

6 MCQs — Data Types MCQs

Practice Arrays & Memory Layout 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

For int a[3][4] stored in row-major order at base address 1000, with 4-byte ints, what is the address of a[2][1]?

1044
1036
1024
1028

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In which order does C/C++ store multidimensional arrays?

Row-major order
Random order
Column-major order
Implementation-defined

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Inside void f(int arr[10]), what does sizeof(arr) return on a 64-bit system?

Compilation error
10
8 (the size of a pointer)
40

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Is int n; cin >> n; int a[n]; standard C++?

Only when n is less than 100
Yes, since C++11
Yes, always
No; variable-length arrays are not part of standard C++ (some compilers accept them as an extension)

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How is a Python list implemented in CPython?

As a hash table
As a singly linked list
As a dynamic array of references, with amortized O(1) append
As a balanced tree

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What is the time complexity of accessing the i-th element of a singly linked list?

O(n²)
O(n)
O(1)
O(log n)

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