BRAIN STRUCK 2

In object-oriented programming, what is encapsulation?

•  Combining data and methods that operate on the data into a single unit

• Hiding the implementation details of an object

•  Creating multiple instances of a class

•  Inheriting properties from multiple classes

What is the purpose of the 'finally' block in Java exception handling?

• It is executed if an exception is thrown

•  It is always executed, whether an exception is thrown or not

•  It is used for defining custom exceptions

•  It is executed before the "try" block

What is the role of a DNS (Domain Name System) server?

• Manages file storage for a website

•  Encrypts website data

•  Sends emails from a domain

• Translates domain names into IP addresses

Which data structure uses LIFO (Last In, First Out) ordering?

•  Linked List

• Queue

• Stack

• Tree

What is the Big O notation for an algorithm that performs a linear search?

• O(1)

• O(n)

• O(log n)

• O(n^2)

What is the purpose of SQL (Structured Query Language)?

• To manage relational databases

• To create graphical user interfaces

•  To design web pages

• To write operating system commands

What does RAID stand for in data storage?

• Random Access Internal Drive

• Rapid Access for Information Database

• Redundant Array of Independent Disks

•  Read and Integrate Data

What is a lambda function in Python?

• A function that cannot accept arguments

• A function that recurses infinitely

•  A function with a return type of "lambda"

• A function defined using the "lambda" keyword

In Java, what is the difference between '==' and '.equals()' when comparing strings?

• "==" compares object references, ".equals()" compares values

•  They are functionally equivalent

• ".equals()" compares object references, "==" compares values

•  They are used for different data types

What is the purpose of the 'super' keyword in Java?

• To access variables from the parent class

• To define a superclass

• To call methods of the parent class

• To inherit multiple classes