Crowdly

What does the ls command do in Linux?

Installs new software

Displays active network connections

Lists files and directories in the current folder

Changes file permissions

Deletes files from the system

Which command would you use in Linux to check if you can connect to a website?

netstat example.com

ping example.com

ls example.com

ip link show

chmod +x example.com

What does the term "virtual memory" refer to in operating systems?

Storage space used to simulate additional RAM

Physical memory installed on the motherboard

A process of encrypting memory for security

Reserved memory for the kernel

Memory allocated for GPU processes

What is the purpose of a Virtual Private Network (VPN)?

Provide additional storage space

Encrypt and secure online communication

Disable untrusted applications

Monitor network traffic in real-time

Improve internet speeds

What does the term "buffer overflow" refer to in OS security?

CPU running out of cache memory

Excessive RAM utilization

Corrupted data in a network packet

A type of physical disk failure

Writing beyond the memory boundary of a buffer

What type of attack does a firewall primarily mitigate?

Unauthorized memory access

Physical attacks on hardware

Social engineering attacks

Network-based attacks

Brute force login attempts

What is the purpose of secure boot in modern operating systems?

Improve application multitasking performance

Boost CPU efficiency

Ensure only trusted software runs during system startup

Enable encryption of all system files by default

Prevent unauthorized access to files

What is the function of the chmod command in Linux?

Monitor network activity

Start background processes

Copy files

Set file permissions

Create new directories

What is the purpose of a system's kernel?

Provide user logins

Display the graphical interface

Detect security breaches

Interact with the hardware directly

Manage web connections