Practice Data Structure Questions and Answers

• Which algorithm constructs a suffix tree in linear time?
• Union-Find with path compression achieves nearly constant time because its complexity is:
• Fibonacci heaps support which operation in O(1) amortized time?
• Tarjan’s algorithm is used to find:
• KMP improves naive string matching by:
• Which algorithm is used for computing Max-Flow in a network?
• Deletion in Red-Black Trees maintains balance using:
• Suffix Trees are useful for:
• Union-Find with Path Compression achieves nearly:
• Fibonacci Heaps support Decrease-Key in:
• Tarjan’s Algorithm finds:
• KMP pattern matching avoids:
• Max-Flow Min-Cut theorem states:
• Deletion in Red-Black Tree may require:
• For Dijkstra’s algorithm on a graph with non-negative weights, which data structure yields the best time complexity for dense graphs?
• In a data analysis scenario involving a fixed-size dataset where elements need to be accessed frequently by their position, which data structure is general...
• Consider a code flow where a large dataset is stored in an array. If frequent insertions and deletions are required at arbitrary positions within the array...
• A programmer is implementing a data analysis tool that frequently needs to append elements to a collection. If an array is used, what is a potential perfor...
• In a multi-dimensional array representing image pixel data, how is a specific pixel (e.g., at `[row][col]`) typically accessed in terms of memory addressin...
• When designing a system where data records are frequently added and removed from the middle of a sequence, which data structure offers the most efficient o...
• A code flow involves processing a stream of data where elements are added to the front and removed from the front. Which type of linked list would provide ...
• What is the primary disadvantage of using a singly linked list compared to an array for random access (e.g., accessing the 50th element)?
• In a data analysis application where two sorted linked lists need to be merged into a single sorted linked list, what is the typical time complexity of thi...
• Which of the following data structures can be efficiently implemented using a linked list?
• In a compiler's code flow, which operation is primarily used to manage function call contexts (local variables, return addresses) during program execution?
• A data analysis algorithm requires processing data in a Last-In, First-Out (LIFO) manner. Which operation is used to remove the most recently added element...
• What is the time complexity for performing `push` and `pop` operations on a stack implemented using a linked list?
• Which of the following is a common application of stacks in code flow for expression evaluation?
• If a stack is implemented using a fixed-size array, what is a significant disadvantage when the stack grows beyond its initial capacity?
• In web development and data exchange, what is the fundamental structure used to represent a collection of key-value pairs in a JSON object?
• A data analysis script receives data in JSON format. Which of the following is a valid JSON data type for a value?
• Consider the standard dynamic programming approach to find the length of the Longest Common Subsequence (LCS) of two strings, text1 and text2. The dp table...
• Consider the following Python code for calculating the length of the LCS: def lcs_length(text1, text2):     m = len(text1)     n = len(text2)     dp ...
• After filling the dp table using the standard dynamic programming approach, we can reconstruct one of the Longest Common Subsequences by backtracking. Cons...
• What are the time and space complexities of the standard dynamic programming approach for finding the length of the Longest Common Subsequence (LCS) of two...
• In the dynamic programming approach for LCS, the base cases are crucial for correctly initializing the dp table. Consider the following Python code snippet...
• Which of the following is a good practice when debugging?
• What is "unit testing" and how does it relate to debugging?
• If a program crashes with a "NullPointerException" (or similar null reference error), what is the most likely cause?
• What is "rubber duck debugging"?