Practice IT Networking Questions and Answers

• What is the best-case time complexity of any comparison-based sorting algorithm?
• Which data structure follows the "last-in, first-out" (LIFO) principle?
• Which algorithm is used to search for a specific element in a sorted array by repeatedly dividing the search interval in half?
• What is the space complexity of an algorithm?
• Which algorithm solves the shortest path problem in a weighted graph?
• What is a database?
• What is the primary key in a relational database?
• Which type of database model organizes data into tables with rows and columns?
• What is the purpose of SQL (Structured Query Language) in database management?
• Which of the following is an example of a relational database management system (RDBMS)?
• What is the ACID acronym in database transactions?
• Which normal form ensures that there are no repeating groups of data within a table?
• Which of the following is NOT a type of database backup?
• What is the purpose of an index in a database?
• Which database operation is used to combine records from two or more tables based on related columns?
• What is a data structure?
• Which data structure follows the "first-in, first-out" (FIFO) principle?
• What is the time complexity of searching an element in a balanced binary search tree?
• Which data structure allows efficient insertion and deletion of elements at both ends?
• Which data structure stores elements in a sorted manner?
• Which data structure is used for implementing depth-first search (DFS) algorithm?
• What is the main advantage of using a hash table data structure?
• Which data structure represents a hierarchical relationship between elements?
• Which data structure is used for implementing breadth-first search (BFS) algorithm?
• What is the primary goal of cybersecurity?
• What is a common method of authentication in cybersecurity?
• What is a DDoS attack?
• What does the term "phishing" refer to in cybersecurity?
• What is the purpose of antivirus software in cybersecurity?
• What is a VPN (Virtual Private Network) used for in cybersecurity?
• What is the purpose of penetration testing in cybersecurity?
• What does the term "zero-day vulnerability" mean in cybersecurity?
• What is the purpose of encryption in cybersecurity?
• What is an operating system?
• What is the primary function of an operating system?
• Which of the following is NOT an example of an operating system?
• What is virtual memory in an operating system?
• What is a process in the context of an operating system?
• What is the role of a device driver in an operating system?
• Which scheduling algorithm is used to allocate CPU time to processes in an operating system?