Welcome to the TheCodingCollege.com DSA Quiz! Are you ready to test your knowledge of Data Structures and Algorithms? This quiz is designed for learners at all levels, covering essential topics from arrays to advanced graph algorithms. Let’s see how well you know your DSA fundamentals and problem-solving strategies!
Quiz Rules
- Each question has four options with only one correct answer.
- Select the option that best answers the question.
- Check your results at the end and see detailed explanations for each question.
Section 1: Arrays and Strings
Question 1
What is the time complexity of searching for an element in a sorted array using Binary Search?
a) O(n)
b) O(\log n)
c) O(n \log n)
d) O(1)
Question 2
Which of the following is used to reverse a string in place?
a) Swap elements from both ends of the string
b) Use a stack to reverse the string
c) Sort the string alphabetically
d) None of the above
Section 2: Linked Lists
Question 3
What is the primary advantage of a doubly linked list over a singly linked list?
a) It uses less memory
b) It allows traversal in both directions
c) It is easier to implement
d) It automatically sorts elements
Question 4
How do you detect a cycle in a linked list?
a) Use two pointers (slow and fast)
b) Sort the linked list and check for duplicates
c) Traverse the list twice
d) Count the total number of nodes
Section 3: Stacks and Queues
Question 5
Which data structure is best suited for implementing recursion?
a) Queue
b) Stack
c) Array
d) Graph
Question 6
What is the time complexity of enqueuing an element in a queue implemented using an array?
a) O(1)
b) O(n)
c) O(\log n)
d) O(n^2)
Section 4: Sorting Algorithms
Question 7
Which of the following sorting algorithms is NOT stable?
a) Bubble Sort
b) Quick Sort
c) Merge Sort
d) Insertion Sort
Question 8
What is the time complexity of Merge Sort?
a) O(n)
b) O(n^2)
c) O(n \log n)
d) O(\log n)
Section 5: Graphs
Question 9
What is the best algorithm for finding the shortest path in a graph with non-negative edge weights?
a) Bellman-Ford Algorithm
b) Dijkstra’s Algorithm
c) Prim’s Algorithm
d) Kruskal’s Algorithm
Question 10
What is the degree of a vertex in a graph?
a) The number of edges connected to the vertex
b) The total weight of the edges connected to the vertex
c) The distance from the vertex to the nearest leaf node
d) The number of cycles the vertex is part of
Section 6: Dynamic Programming
Question 11
What does the term “overlapping subproblems” mean in Dynamic Programming?
a) The problem is split into unrelated smaller problems
b) The same subproblems are solved multiple times
c) The solution depends on the order of problem-solving
d) The problem cannot be solved using recursion
Question 12
Which of the following problems is solved using Dynamic Programming?
a) Finding a cycle in a graph
b) N-Queens Problem
c) Longest Common Subsequence
d) Sorting an array
Section 7: Trees
Question 13
What is the height of an empty binary tree?
a) -1
b) 0
c) 1
d) Undefined
Question 14
Which traversal of a binary search tree gives elements in sorted order?
a) Pre-order Traversal
b) Post-order Traversal
c) In-order Traversal
d) Level-order Traversal
Bonus Questions
Question 15
What is the purpose of a Hash Map?
a) To sort data
b) To store key-value pairs for quick access
c) To perform matrix operations
d) To implement recursion
Question 16
What is the time complexity of inserting an element in a hash table (in the best case)?
a) O(1)
b) O(\log n)
c) O(n)
d) O(n^2)
Answers and Explanations
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