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WorksheetsHistory of Coding - Lesson 8
Total questions: 20
Worksheet time: 11mins
The Caesar cipher is a substitute code.
False
True
A cipher is _________________________.
a person who makes up secret codes
an algorithm that is used to scramble text so that it can be passed in secret
a lock that can be used to lock a message in a lock box
any puzzle, such as a crossword or Sudoku puzzle
Who was the first know user of the Caesar Cipher?
Caesar Romanus
Julius Caesar
Alan Turing
There isn't one
What is the process of converting a cipher text into plain text.
Encryption
Decryption
Plain Text
Cryptography
This a means of early communications consisting of various dots and dashes.
Morse Code
Semaphore
Hand Signaling
An encryption key is used to help decrypt messages.
Taking a secret message and reproducing the original plain text is known as?
Caesar Cipher
Encryption
Cipher Text
Decryption
Convert the binary number 1100 to decimal.
15
11
12
13
Convert the binary number 10111 to decimal.
23
27
30
31
Convert the binary number 11110 to decimal.
23
27
29
30
the most common format for text files in computers and on the Internet.
Computers store all data using...
Binary
Hexadecimal
Denary
Octal
On
Off
Which component of the Enigma machine was responsible for changing the electrical path with each key press?
The plugboard
The rotors
The lampboard
The keyboard
Where did Alan Turing carry out much of his codebreaking work during World War 2?
Downing Street
Bletchley Park
Cambridge University
Westminster Abbey
What was the name of the machine Alan Turing helped design to break Enigma codes?
Atlas
Colossus
Bombe
Manchester Mark I
Which field did Alan Turing's work help to establish?
Environmental science
Modern medicine
Computer science
Architecture
There are 8 bits to one byte.
What does encryption help to achieve?
It makes data unreadable to unauthorised users.
It deletes sensitive information.
It increases the file size.
It changes the language of the message.
What is the binary representation of the decimal number 8?
1100
1010
1111
1000
