2. Which data structure uses FIFO (First In First Out)?

Stack
Queue
Tree
Graph

3. What is the output of the following Python code?
print("2" + "3")

5
23
Error
None

4. What is polymorphism in OOP?

Ability to inherit features
Ability to hide data
Ability to take many forms
Ability to override base class

5. Which keyword is used to inherit a class in Java?

implement
inherit
extends
super

6. What does SQL stand for?

Structured Query Language
Strong Query Language
Simple Query Language
Systematic Query Language

7. What is a deadlock in OS?

A process that finishes early
A condition where no process proceeds
A memory leak
A system update

8. Best case time complexity of Binary Search is:

O(n)
O(log n)
O(1)
O(n log n)

9. What is the default port for HTTP?

20
21
80
443

10. Which tag is used to insert a line break in HTML?

<br>
<lb>
<break>
<newline>