Practice Data Structure Questions and Answers

• Which of the following is a key advantage of digital signatures?
• Which of the following statements about normalization in relational databases is correct?
• What is the primary purpose of a B+ Tree in a database management system?
• Which of the following is true about triggers in a relational database?
• Which of the following best represents the main objective of the Requirements Analysis phase in the Software Development Lifecycle (SDLC)?
• Which of the following types of software testing ensures that previously working functionality is still operational after changes?
• Which SOLID principle emphasizes that a class should have only one reason to change?
• Which design pattern is most suitable for controlling access to a resource by limiting the number of clients that can use it concurrently?
• Which of the following statements best describes polymorphism in object-oriented programming?
• Which OOP principle allows for restricting access to certain parts of an object while exposing only necessary parts for interaction?
• Which type of relationship between classes in OOP is best represented when one class is a part of another class but can exist independently? ...
• Which feature of OOP allows hiding implementation details while showing only the necessary functionality?
• Given the following code snippet, which operation is performed on the binary tree to produce the output: 4, 2, 5, 1, 3 ? class Node {       int data;...
• Consider the following stack operations. What will be the content of the stack after executing all the operations? Stack stack = new Stack ();  stack.pus...
• Which of the following techniques is most efficient for finding the kth smallest element in a Binary Search Tree (BST)?
• What will be the output of the following queue implementation using two stacks? class QueueUsingStacks {      Stack s1 = new Stack ();      Stac...
• Artificial Intelligence Which of the following statements best describes the role of a reinforcement learning agent in a complex environment? ...
• Machine Learning Which Machine Learning model is best suited for predicting stock market trends based on sequential time-series data?
• Internet of Things (IoT) In an IoT ecosystem, which protocol is most efficient for constrained devices communicating over lossy networks? ...
• Which of the following best exemplifies a critical advantage of Mobile Edge Computing (MEC) over traditional cloud computing?
• Which of the following is the most critical success factor for the implementation of a Decision Support System (DSS) within an organization?
• Natural Language Processing (NLP) In the context of sentiment analysis, which of the following NLP techniques provides the most accurate classification o...
• Computer Architecture Which architectural feature is crucial for improving the performance of modern multi-core processors?
• Which attack can be mitigated using DNSSEC (Domain Name System Security Extensions)?
• Which of the following is the most effective method to ensure data confidentiality when transmitting sensitive information over a public network?
• What is the primary role of a Certificate Authority (CA) in a Public Key Infrastructure (PKI)?
• Which protocol provides secure authentication by encrypting credentials before transmission and uses a challenge-response mechanism?
• Which encryption technique is used in Transport Layer Security (TLS) to securely establish a session key?
• Which of the following is a primary advantage of using a star schema in a data warehouse design?
• Which of the following best describes the key benefit of blockchain technology in supply chain management?
• In a data warehousing environment, what is the primary purpose of an OLAP (Online Analytical Processing) cube?
• Which of the following is NOT a characteristic of a minimum spanning tree (MST) in a connected, undirected graph?
• Which of the following is the primary reason why polymorphism is useful in Object-Oriented Programming (OOP)?
• Which SQL query will retrieve the second highest salary from an Employee table?
• Given the IP address 192.168.10.5 and the subnet mask 255.255.255.240 , what is the range of valid host addresses in this subnet?
• What is the purpose of the keys() method in a dictionary?
• Which data structure is ideal for priority-based scheduling?
• Priority Queue allows access to elements based on priority rather than order.
• Which tree traversal gives nodes in non-decreasing order for a BST?
• Which traversal method visits the root node first in trees?