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Test: Linked List - 2 - Software Development MCQ


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10 Questions MCQ Test DSA in C++ - Test: Linked List - 2

Test: Linked List - 2 for Software Development 2024 is part of DSA in C++ preparation. The Test: Linked List - 2 questions and answers have been prepared according to the Software Development exam syllabus.The Test: Linked List - 2 MCQs are made for Software Development 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Linked List - 2 below.
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Test: Linked List - 2 - Question 1

Which of the following statements about a doubly linked list is true?

Detailed Solution for Test: Linked List - 2 - Question 1

Doubly linked lists allow traversal in both directions by having pointers to both the previous and next nodes.

Test: Linked List - 2 - Question 2

Which of the following statements about an array is true when compared to a linked list?

Detailed Solution for Test: Linked List - 2 - Question 2

Arrays have a fixed size, while linked lists can have a dynamic size that can be modified during runtime.

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Test: Linked List - 2 - Question 3

What is the output of the following code?
#include <iostream>
using namespace std;

struct Node {
    int data;
    Node* next;
};

void insertAtEnd(Node** head, int value) {
    Node* newNode = new Node();
    newNode->data = value;
    newNode->next = NULL;

    if (*head == NULL) {
        *head = newNode;
    } else {
        Node* current = *head;
        while (current->next != NULL) {
            current = current->next;
        }
        current->next = newNode;
    }
}

void printList(Node* head) {
    Node* current = head;
    while (current != NULL) {
        cout << current->data << " ";
        current = current->next;
    }
}

int main() {
    Node* head = NULL;
    insertAtEnd(&head, 1);
    insertAtEnd(&head, 2);
    insertAtEnd(&head, 3);
    printList(head);
    return 0;
}

Detailed Solution for Test: Linked List - 2 - Question 3

The code creates a linked list and inserts three elements at the end using the insertAtEnd function. The printList function outputs the elements of the linked list.

Test: Linked List - 2 - Question 4

Which of the following operations can be performed efficiently on a linked list?

Detailed Solution for Test: Linked List - 2 - Question 4

Reversing a linked list can be done efficiently by adjusting the pointers, making it an efficient operation on linked lists.

Test: Linked List - 2 - Question 5

Which of the following operations can be performed on a linked list?

Detailed Solution for Test: Linked List - 2 - Question 5

All the mentioned operations (insertion at the beginning, deletion from the beginning, and search for an element) can be performed on a linked list.

Test: Linked List - 2 - Question 6

Which of the following is the correct way to traverse a linked list?

Detailed Solution for Test: Linked List - 2 - Question 6

Traversing a linked list is commonly done using a while loop. The loop continues until the current node becomes NULL, indicating the end of the list.

Test: Linked List - 2 - Question 7

Which of the following algorithms can be used to reverse a linked list?

Detailed Solution for Test: Linked List - 2 - Question 7

Linked lists can be reversed using both iterative and recursive approaches. The iterative approach involves manipulating pointers to reverse the list, while the recursive approach uses function calls to reverse the list.

Test: Linked List - 2 - Question 8

Which of the following is not a valid method to delete a node from a linked list?

Detailed Solution for Test: Linked List - 2 - Question 8

Deleting a node from a linked list can be done by value or by reference (i.e., pointing directly to the node to be deleted). Deleting by index is not a common method since linked lists are not typically accessed by index.

Test: Linked List - 2 - Question 9

Which of the following algorithms can be used to find the Nth node from the end of a linked list?

Detailed Solution for Test: Linked List - 2 - Question 9

Both the two-pointer approach and recursion can be used to find the Nth node from the end of a linked list. The two-pointer approach uses two pointers, one moving N steps ahead of the other, while recursion involves traversing the list using recursive calls.

Test: Linked List - 2 - Question 10

What is the time complexity to find the Nth node from the end of a linked list using the two-pointer approach?

Detailed Solution for Test: Linked List - 2 - Question 10

Using the two-pointer approach, we can find the Nth node from the end of a linked list in constant time. The algorithm involves using two pointers, one moving N steps ahead of the other.

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