What will be the output of the following Python code?

• [1, 2, 3]

• [1, 2, 3, 4]

• [1, 2, 4]

• Error

Which data structure is used for implementing recursion?

• Queue

• Stack

• Linked List

• Array

What is the worst-case time complexity of the Quick Sort algorithm?

• O(n)

• O(n log n)

• O(n²)

• O(log n)​

In SQL, which command is used to remove all records from a table without removing the table structure?

• DELETE

• DROP

• TRUNCATE

• REMOVE

Which protocol is used to send email messages from a client to a server?

• FTP

• SMTP

• HTTP

• IMAP

Which of the following is a characteristic of a multithreaded process?

• Multiple processes with a single thread each

• A single process with multiple threads

• Multiple processes with multiple threads each

• A single process with a single thread​

Which of the following is not a valid access modifier in Java?

• public

• private

• protected

• internal​

Which data structure is used to implement LRU (Least Recently Used) cache?

• Stack

• Queue

• HashMap and Doubly Linked List

• Array

Which algorithm is used to find the shortest path in a weighted graph?

• Depth-First Search

• Breadth-First Search

• Dijkstra's Algorithm

• Kruskals Algorithm

Which device operates at the Data Link layer of the OSI model?​

• Router

• Switch

• Hub

• Repeater