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WorksheetsCryptography & Linux
Total questions: 30
Worksheet time: 2hrs 30mins
Name
Class
Date
1.
A single on/off or 0/1 in a computer's transistor is known as a
a)
bit
b)
byte
c)
nibble
d)
hex
2.
Which of the following is not a measure of the number of bytes in a computer?
a)
Zilobyte
b)
Kilobyte
c)
Megabyte
d)
Terabyte
3.
Which of the following is the law that says the speed and processing power of a computer will double about every two years?
a)
Moore's Law
b)
Murphy's Law
c)
Newton's Law
d)
Gate's Law
4.
The system which represents alpha-numeric data in a computers, such as A = 65 = 01000001 is called:
a)
ASCII
b)
Translator
c)
AARP
d)
NROTC
5.
Which of the following is the base 16 number system?
a)
Hexadecimal
b)
Binary
c)
Decimal
d)
Octal
6.
Representing a range of characters by some kind of conversion system, like ASCII, is called:
a)
Encoding
b)
Encrochment
c)
Encryption
d)
Translation
7.
CTF stands for
a)
Capture the Flag
b)
Coding to Find
c)
Cyber Text Foundation
d)
Cybersecurity Team Fun
8.
How many bits are there in a byte?
a)
8
b)
2
c)
4
d)
6
9.
Scrambling data so that it is unreadable to anyone except those who know the trick to decoding it is...
a)
Cryptography
b)
Cybersecurity
c)
Coding
d)
Hieroglyphics
10.
The data that has been encrypted is called...
a)
Ciphertext
b)
Algorithm
c)
Plaintext
d)
Code
11.
This is a method of encryption in when the order of the letters is changed. Scytale cipher, in which a ribbon is wrapped around a cylinder is and example.
a)
Transposition
b)
Substitution
c)
Hieroglyphics
d)
Graphics
12.
A historic cipher in which the alphabet is shifted left or right a given number of spaces.
a)
Caesar Cipher
b)
Julius Cipher
c)
Vigenere Cipher
d)
Enigma Cipher
13.
A substitution cipher based on multiple alphabets and a system to switch between the them using a password. A table or chart is often used.
a)
Vigenere Cipher
b)
Julius Cipher
c)
Caesar Cipher
d)
Enigma Cipher
14.
This is a technique used to solve substitution ciphers based on commonly used letters and words.
a)
frequency analysis
b)
guess and check
c)
polyalphabetic analysis
d)
encryption analysis
15.
Using the simplest Caesar cipher, decode the following ciphertext. DZCFS
a)
CYBER
b)
STOCK
c)
BRAIN
d)
TESLA
16.
One-time Pad uses a pre-shared key only once which makes this encryption method..
a)
Both A & B
b)
Impractical
c)
Unbreakable
d)
None of the above
17.
The practice of hiding messages in an image or text is called...
a)
Steganography
b)
Bibliography
c)
Photography
d)
Chirography
18.
The information about a file that is embedded in the file, such as date, location, size, etc
a)
metadata
b)
gigadata
c)
imagedata
d)
versiondata
19.
Which of the following is NOT a tool for steganography?
a)
Vigenere Table
b)
Exif Viewer Tool
c)
Hex Editor
d)
Photo Editing Software
20.
True or False: Linux CLI is case sensitive
a)
True
b)
False
21.
To use autocomplete when typing in a command in Linux you can use which key
a)
Tab
b)
return
c)
Left arrow
d)
CTRL
22.
To clear your screen in Linux you can
a)
Type in 'clear'
b)
Type in 'clr'
c)
Hit the ENTER key
d)
Hit the Down Arrow 7 times
23.
Which of the following commands is used for searching for a word or phrase in a file in Linux
a)
grep
b)
touch
c)
ls
d)
pwd
24.
When you type in pwd it will give you the
a)
The absolute path of your current location
b)
The relative path of your current location
c)
The list of all files in your current location
d)
The name of the root user
25.
The standard output is to the screen, but you can redirect the output to go to a file by using which of the following symbols?
a)
>
b)
<
c)
+
d)
=
26.
To add data to an existing file you can use the append symbol which is
a)
>>
b)
>
c)
++
d)
+
27.
What does the the following command do? sort -r animals.txt
a)
Sorts all the items in animals.txt in reverse alphabetical order
b)
Sorts all the items in animal.txt from biggest to smallest
c)
Sorts all the items in animal.txt in alphabetical order
d)
Creates a file called animals.txt to be used for sorting
28.
What command will output information about the file format such as txt, jpg, doc, exe
a)
tree
b)
file
c)
pwd
d)
info
29.
A small program of Linux commands that can perform tasks on a computer is called
a)
scripts
b)
games
c)
executables
d)
plays
30.
Which of the following will share activities that recently took place?
a)
history
b)
shell
c)
recent
d)
find
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