Identifying Requirement Kinds | Quant Interview Q

#include #include class Node { public: int value; Node* next; Node(int v) : value(v), next(nullptr) {} }; int main() { std::vector nodes; for (int i = 0; i < 5; ++i) { nodes.push_back(new Node(i)); } for (int i = 0; i < 4; ++i) { nodes[i]->next = nodes[i + 1]; } Node* current = nodes[0]; while (current != nullptr) { std::cout << current->value << " "; current = current->next; } for (auto node : nodes) { delete node; } return 0; } ```

What does the code output?

A) 0 1 2 3 4
B) Undefined behaviour due to dangling pointers
C) 0
D) Memory leak and undefined output

Prompt end. ---

What this C++ code-reading question tests

This easy question assesses your ability to trace control flow and memory management in C++. It asks you to read a short snippet, understand its data structures and pointer operations, and predict its output correctly.

The question probes whether you recognize how dynamic allocation, pointer chaining, and iteration interact in a straightforward linked-list-like scenario. Code-reading skills are foundational in C++ interviews, especially at firms where you must debug or review production systems quickly and confidently.

Manual memory allocation and deallocation patterns
Pointer arithmetic and pointer chaining
Loop invariants and control flow

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What this C++ code-reading question tests

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