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Which problem-solving technique is used to solve problems by breaking them down into simpler subproblems and combining their solutions?
A. Divide and Conquer
B. Dynamic Programming
C. Greedy Algorithm
D. Backtracking
Answer: Divide and Conquer
What is the average-case time complexity of quicksort?
A. O(n log n)
B. O(n^2)
C. O(n)
D. O(log n)
Answer: O(n log n)
In which traversal method do you visit the root node after visiting both left and right subtrees?
A. Post-Order Traversal
B. In-Order Traversal
C. Pre-Order Traversal
D. Level-Order Traversal
Answer: Post-Order Traversal
Which data structure is used to efficiently find the shortest path in a weighted graph with non-negative weights?
A. Priority Queue
B. Stack
C. Queue
D. Hash Table
Answer: Priority Queue
What is the time complexity of finding the minimum element in a min-heap?
A. O(1)
B. O(log n)
C. O(n)
D. O(n log n)
Answer: O(1)
Which of the following is not a greedy algorithm problem?
A. Activity Selection Problem
B. Huffman Coding
C. Longest Common Subsequence
D. Fractional Knapsack Problem
Answer: Longest Common Subsequence
Which problem-solving technique involves exploring all possible solutions and choosing the best one?
A. Backtracking
B. Dynamic Programming
C. Greedy Algorithm
D. Divide and Conquer
Answer: Backtracking
What is the space complexity of storing a binary tree with `n` nodes?
A. O(n)
B. O(log n)
C. O(n log n)
D. O(1)
Answer: O(n)
What is the time complexity of the ‘enqueue’ operation in a circular queue implemented using an array?
A. O(1)
B. O(n)
C. O(log n)
D. O(n log n)
Answer: O(1)