CODEHS CYBERSECURITY
LEVEL 1 CERTIFICATION
PRACTICE TEST 45
QUESTIONS
Question 1: A school portal allows only authorized students to view their own
grades. Which security objective is being protected most directly?
Choices:
1) Availability 2) Integrity 3) Con�dentiality 4) Redundancy
Correct Answer: Con�dentiality
Explanation: Con�dentiality means preventing unauthorized people from viewing protected information. Restricting grade access to the appropriate student protects con�dentiality.Page 1
Question 2: In an encryption system, what is plaintext?
Choices:
1) The secret value that controls encryption or decryption 2) A message whose integrity has been veri�ed 3) The encrypted message produced by an algorithm 4) The original readable message before encryption
Correct Answer: The original readable message before encryption
Explanation: Plaintext is the readable information before encryption. Encryption transforms plaintext into ciphertext.
Question 3: Which task is a primary responsibility of an operating system?
Choices:
1) Assigning a software license to each user account 2) Managing processor time, memory, storage, and device access for applications 3) Resolving all domain names on the internet 4) Writing the source code for every installed application
Correct Answer: Managing processor time, memory, storage, and device access for
applications Explanation: An operating system manages resources such as memory, storage, processes, and devices while providing a platform for applications.Page 2
Question 4: What is the main purpose of an IP address on a network?
Choices:
1) To name the wireless network that a device joins 2) To identify the physical manufacturer of a network card 3) To specify which application owns a domain name 4) To provide a logical address used to identify and reach a network interface Correct Answer: To provide a logical address used to identify and reach a network interface Explanation: An IP address provides a logical network address used to identify interfaces and route packets to their destinations.
Question 5: Which internal computer component provides fast temporary storage
for data and programs that are currently in use?
Choices:
1) RAM
2) Hard disk drive 3) Optical disc
4) SSD
Correct Answer: RAM
Explanation: RAM is volatile memory used for data and instructions that the processor needs while programs are running.Page 3