Data Structures and Algorithms

DSA Quiz

Data Structures and Algorithms DSA Quiz

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Question 1 of 22

1. Question
What is the time complexity for inserting an element at the end of a singly linked list?
- O(n)
- O(1)
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Question 2 of 22

2. Question
What is the worst-case time complexity of searching for an element in a balanced Binary Search Tree (BST)?
- O(log n)
- O(n)
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Question 3 of 22

3. Question
Which operation in a stack doesn’t change the stack?
- Peek
- Pop
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Question 4 of 22

4. Question
Which sorting algorithm has a worst-case time complexity of O(n^2)?
- Bubble Sort
- Quick Sort
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Question 5 of 22

5. Question
Which data structure is commonly used to demonstrate recursion?
- Tree
- Queue
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Question 6 of 22

6. Question
What is the Big-O time complexity of an algorithm that performs nested loops with sizes ‘n’ and ‘m’?
- O(n * m)
- O(n + m)
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Question 7 of 22

7. Question
Which type of heap allows the root to be the largest element?
- Max-Heap
- Min-Heap
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Question 8 of 22

8. Question
What is the time complexity of binary search in a sorted array?
- O(log n)
- O(n)
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Question 9 of 22

9. Question
Which PHP function is used to merge two or more arrays into a single array?
- array_merge()
- array_combine()
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Question 10 of 22

10. Question
Which step comes first in the typical workflow of creating an application using PHPRunner?
- Designing database tables
- Generating source code
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Question 11 of 22

11. Question
What is the average time complexity for searching in a hash table?
- O(1)
- O(log n)
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Question 12 of 22

12. Question
Which PHP sorting function has the best average-case time complexity?
- sort()
- rsort()
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Question 13 of 22

13. Question
What will happen if a recursive function in PHP doesn’t have a base case?
- Infinite recursion leading to stack overflow error
- It returns null
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Question 14 of 22

14. Question
What operation in a queue adds an element at the rear end?
- Enqueue
- Dequeue
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Question 15 of 22

15. Question
Which PHP function is used to find the length of a string?
- strlen()
- count_chars()
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Question 16 of 22

16. Question
Which event is triggered before an edit operation in PHPRunner?
- BeforeEdit
- AfterEdit
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Question 17 of 22

17. Question
Which operation in a linked list removes the first node?
- deleteHead()
- deleteTail()
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Question 18 of 22

18. Question
What is the index of the first element in a PHP array?
- 0
- 1
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Question 19 of 22

19. Question
Which PHP function is used to remove the last element from an array?
- array_pop()
- array_shift()
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Question 20 of 22

20. Question
In PHPRunner, which HTML element is commonly used to trigger JavaScript code on page load?
- body
- head
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Question 21 of 22

21. Question
Which PHP function is used to convert a string to all lowercase characters?
- strtolower()
- ucwords()
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Question 22 of 22

22. Question
Which PHPRunner event is used to execute JavaScript code when a page loads?
- OnPageLoad
- BeforeShowList
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