Unit 4: Cyber Security and Linux

Crystal, Adrian, and Nathan are participating in a cybersecurity competition. They come across the term 'CTF'. What does CTF refer to in this context?

• Capture the Flag

• Code Transfer Function

• Cyber Threat Force

• Computer Task Force

Richard, Ronaldo, and Shivika are learning Linux commands. They want to list the files in a directory. Which command should they use?

• Type in 'ls'

• Type in 'list'

• Hit the ENTER key

• Hit the Down Arrow 7 times

Caiden is working on a project and he wants to overwrite some data in an existing file. Which symbol should he use to accomplish this?

• ++

• >

• >>

• +

Jason sends a confidential document to Daniel over the Internet. To prevent unauthorized access, what process does Jason use to convert the information in the document into a code?

• Encryption

• Decryption

• Compression

• Decompression

Walter, Komovi, and Zaid are learning about number systems in their computer science class. Their teacher asked, 'Which of the following is the base 2 number system used in computing?'

• Decimal

• Binary

• Hexadecimal

• Octal

Lindsey is learning Linux CLI and she comes across the 'ls' command. Oriole tells her that it is used to list files and directories. Is Lindsey's statement true or false?

• TRUE

• FALSE

Mansoor, Sithil, and Ximena are learning about computers. They learned that data in a computer is made up of smaller units. What is the smallest unit of data they learned about?

• bit

• byte

• word

• register

Truth, Versen, and Charles are part of a detective club at their school. They found a note with a substitution cipher. What method should they use to decipher it by analyzing the frequency of commonly used letters and words?

• cryptanalysis

• frequency analysis

• guess and check

• polyalphabetic analysis

Rayyan, Daniel, and Bryce are part of a secret club and they communicate using a type of cipher that uses a simple form of polyalphabetic substitution. This cipher uses a series of different Caesar ciphers based on the letters of a keyword. Can you guess the name of this cipher?

• Playfair Cipher

• Vigenere Cipher

• Transposition Cipher

• Atbash Cipher

Ben, Emma, and Liam are working on a Linux project. They need to view the list of files in their current directory. Which command should they use?

• ls

• grep

• touch

• pwd