Reverse a linked list

Question

Anonimo · Accepted Answer

There's quite an extended back and forth in actual interviews for questions like this, so nothing quite like real practice.


The Prepfully Qualcomm  Software Engineer Intern experts have actually worked in this role, so they're able to do an honest-to-God accurate mock, which really puts you through the paces.


prepfully.com/practice-interviews

Anonimo · Answer

C++:

struct node {
    int datum;
    node * next;
}

void reverse(node **head) {
    node * previous = nullptr;
    node * current = head;
    node * next = nullptr;

    while(current != nullptr) {
        next = current->next;
        current->next = previous;
        previous = current;
        current = next;
    }
    
    *head = previous;
}

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