[Semester 2] Computer Human Interaction

Question 1

Machine is turned on

Answer 1

Goes through boot process

Question 2

User opens IDE and Spotify

Answer 2

OS runs multiple processes concurrently

Question 3

User googles an error

Answer 3

Process for opening chrome is loaded and networking protocols are started

Question 4

Hypertext Transfer Protocol (HTTP)

Answer 4

Main protocol for web transactions

Question 5

Secure Sockets Layer (SSL)

Answer 5

Protocol for data encryption

Question 6

Secure HTTP (HTTPS)

Answer 6

Combines HTTP and SSL

Question 7

Email protocols

Answer 7

• Simple Mail Transfer Protocol (SMTP)
• Post Office Protocol (POP)
• Internet Message Access Protocol (IMAP)

Question 8

File Transfer Protocol (FTP)

Answer 8

Exchanging files between computers

Question 9

User submits coursework on NESS 5 minutes before the deadline

Answer 9

NESS has lots of traffic so uses load balancing

Question 10

Load balancing

Answer 10

Web traffic is spread across multiple servers

Question 11

User loads a game

Answer 11

System tries to access more memory

Question 12

Machine crashes

Answer 12

Potential for kernel panic

Question 13

Non-paged kernel memory

Answer 13

Kernel memory using RAM

Question 14

Paged kernel memory

Answer 14

Used for the kernel

Question 15

Committed/virtual memory

Answer 15

An extension of RAM

Question 16

True or false: Virtual memory will only be used if there is no space left in RAM

Answer 16

False! Some processes are always transferred to VM regardless of how much space is left in RAM.

Question 17

Ring 3

Answer 17

Applications. This is the least privileged layer.

Question 18

Rings 2 and 1

Answer 18

Device drivers

Question 19

Ring 0

Answer 19

The kernel. This is the most privileged layer.