Technical Quiz

What is the output of the following C code? int x = 5; printf("%d", x++);

• 6

• 5

• Error

• Undefined Behavior

Which of the following is not a valid variable name in Python?

• my_var

• 2variable

• _value

• variable_name

What is the main purpose of the "return" statement in a function?

• Print a value

• Exit the function and return a value

• Loop through the function

• None of the above

Which data structure follows the First-In-First-Out (FIFO) principle?

• Stack

• Queue

• Array

• Linked List

What is the time complexity of searching an element in a balanced binary search tree?

• O(1)

• O(n)

• O(log n)

• O(n log n)

Which sorting algorithm has the worst-case time complexity of O(n²)?

• Merge Sort

• Quick Sort

• Bubble Sort

• Heap Sort

What type of database model does SQL use?

• Hierarchical

• Relational

• Network

• Object-Oriented

Which SQL command is used to retrieve data from a database?

• FETCH

• GET

• SELECT

• RETRIEVE

What is the primary key in a database?

• A key used to encrypt data

• A unique identifier for records

• A key used to fetch data quickly

• A key used in relationships between tables

Which protocol is used for secure communication over the internet?

• HTTP

• FTP

• SSH

• Telnet