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encryption

Total questions: 81

Worksheet time: 49mins

Name
Class
Date
1.

What is the problem with the following plain text to encrypt with a Caesar Cipher?

Is your birthday 9/30/1998?

a)

Numbers cannot be encrypted

b)

It would be relatively easy to decipher after encryption

c)

Symbols cannot be encrypted

d)

all of the above

2.

Which of the following best describes the need for using cryptography in data communications?

a)

Cryptography allows data to be sent over the internet.

b)

Cryptography ensures data is decipherable by the recipient, but not accessible by a third party.

c)

Cryptography prevents third parties from accessing personal accounts.

d)

Data is easier to access when it is encrypted.

3.

Consider the process of encoding and decoding a message using the following Caesar cipher encoding scheme in which the plaintext and ciphertext alphabets are offset by four positions, as shown below:

Plaintext: a b c d e f g h i j k l m n o p q r s t u v w x y z

Ciphertext: w x y z a b c d e f g h i j k l m n o p q r s t u v


Which of the following encoded ciphertext strings decodes to an original plaintext message of "secret"?

a)

etsecr

b)

wigvix

c)

kwujwl

d)

oaynap

4.

What items are required to do a Substitution Cipher?

a)

Keyword

b)

Cipher text

c)

Key

d)

Number of alphabetical shifts

5.
What is the world's most common password?  
(#1 on the Worst Passwords list)
a)
123456
b)
letmein
c)
starwars
d)
house1
6.
Encryption is a way of 
a)
Securing Information on a network
b)
Securing Viruses
c)
Deleting applications
d)
Hacking Passwords
7.
Taking a secret message and reproducing the original plain text is known as?
a)
Vigenere Cipher
b)
Encryption
c)
Random Substitution cipher
d)
Decryption
8.
What can be found in our browsers that keeps a record of our movements on the Internet?
a)
Hackers
b)
Virus
c)
Cookies
d)
Phishing scam
9.
An encryption key is used to help decrypt messages
a)
True
b)
False
10.

What is the definition of encryption?

a)

A method of making text unreadable to prevent unauthorised viewing.

b)

Programming code.

c)

Making data smaller.

d)

Producing a list of options for data input.

11.

Which Roman invented one of the earliest encryption methods?

a)

Caesar

b)

Caligula

c)

Nero

d)

Spartacus

12.

What is the algorithm of ceasar's cipher?

a)

Each letter is replaced with a particular symbol

b)

Each letter is replaced with a letter a certain number of steps down the alphabet

c)

Each letter is replaced with a particular number from 0 to 26, and numbers are replaced with letters.

13.
A part of a computer system used to prevent, detect and block unauthorised access is known as?
a)
Spyware
b)
Malware
c)
Trojan Horse
d)
Firewall
14.

Providing someone read-only access to data is an example of

a)

security

b)

encryption

c)

ciphering

d)

decryption

15.
Almost ALL the emails you send can be seen by third party hackers. 
a)
True
b)
False
16.
What are the only two numbers you can use in binary?
a)
0 and 1
b)
1 and 2
c)
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
d)
1, 2, 4, 8, 16
17.
If a binary number ends with a 1, it must be...
a)
An odd number
b)
An even number
c)
A prime number
d)
The number 12
18.
Which of these is the correct sequence for the place values for binary numbers?
a)
1, 2, 4, 8, 16, 32, 64, 128
b)
1, 2, 4, 6, 8, 10, 12, 14, 16
c)
1, 2, 3, 4, 5, 6, 7, 8
d)
0, 1
19.
What is the denary number system?
a)
It counts the number of dens
b)
Our usual base 10 number system
c)
A special number system for computers
d)
Den Ary's number system
20.
What is 12 in binary?
HINT: It has an 8 and a 4 in it!
a)
12
b)
11
c)
1100
d)
1011
21.
What is 1011 in denary?
a)
11
b)
14
c)
26
d)
1011
22.
What is 0101 + 1010?
HINT:
1 + 0 = 1
0 + 1 = 1
1 + 1 = 10
a)
1111
b)
2020
c)
146.6
d)
?
23.
Convert 00010001 to decimal
a)
17
b)
27
c)
37
d)
47
24.
Convert 00000011 to decimal
a)
192
b)
3
c)
2
d)
6
25.
What is the function of the <p> tag?
a)
Defines a paragraph.
b)
Makes the text purple.
c)
It pushes the text to the right.
d)
Prints the webpage.
26.
What does HTML stand for?
a)
Hypertext Medium Language
b)
Hippo Tries Making Licorice
c)
Hypertext Markup Lingo
d)
Hypertext Markup Language
27.
You should save HTML files with which file extension?
a)
.htm
b)
.index
c)
.webpage
d)
.html
28.
Name an element which doesn't have a closing tag.
a)
<img>
b)
<head>
c)
<body>
d)
<p>
29.
What HTML element defines the title of the document?
a)
<title>
b)
<head>
c)
<meta>
30.
The content of the web (such as your pictures, text, links) will show up here. 
a)
Head
b)
Body
c)
Style
d)
Folder
31.
Which of the following is the largest heading? 
a)
H2
b)
H3
c)
H4
d)
H6
32.
Which web image format supports both transparency AND animation?
a)
PNG
b)
JPG
c)
SWF
d)
GIF
33.
What symbol should precede hexadecimal color codes?
a)
ampersand
b)
semicolon
c)
number sign
d)
equal sign
34.

What is computer programming?

a)

software you install on the computer

b)

a set of instructions telling the computer how to process input and deliver output

c)

print outs from the computer

35.

What is the insertion point/cursor?

a)

Where text appears after you copy and paste

b)

A flashing vertical bar where the cursor is a symbol (usually a flashing underline) that appears on the screen indicating where the user can begin entering text

c)

A flashing vertical bar that shows you where to save your document

36.

How do you rename a file?

a)

Right click on the file and click rename

b)

Double click on the file and change the title

c)

Click on the file and rename it in Word

37.

What is word wrap?

a)

A special effect you can do to text for titles and headings

b)

When the words wrap around the page to make a page boarder

c)

The automatic wrapping of text from the end of one line to the beginning of the next line

38.

What is a browser?

a)

A person who casually looks at at magazines

b)

A program used to access the World Wide Web

c)

An app on your smart phone or tablet

39.

What is an icon?

a)

A small app that will delete a file when clicked on

b)

A small graphical representation of a program or file that, when clicked on, will be run or epened

c)

A small graphical representation of a program or file that gives you detailed information about the program or file

40.

What is the CPU of the computer?

a)

The brain of the computer

b)

The memory of the computer

c)

The digestive system of the computer

41.

Choose an example of an output device.

a)

Printer

b)

Microsoft Word

c)

Mouse

42.

Choose an example of hardware.

a)

Microsoft Word

b)

Google Chrome

c)

Monitor

43.

Choose an example of an input device.

a)

Monitor

b)

Google Chrome

c)

Keyboard

44.

Choose an example of an output device.

a)

Printer

b)

Microsoft Word

c)

Mouse

45.

Choose an example of software.

a)

Mouse

b)

Microsoft Word

c)

Computer tower

46.

If you are typing a capital "A", which shift key should you use?

a)

Both

b)

Left

c)

Right

47.
What does CPU stand for?
a)
Critical Processing Unit
b)
Core Processing Unit
c)
Common Processing Unit
d)
Central Processing Unit
48.
A keyboard is ______.
a)
input
b)
output
49.
A mouse is _______.
a)
input
b)
output
50.
A monitor is ______
a)
input
b)
output
51.
A scanner is _______.
a)
input
b)
output
52.
This is the image of a __________ .
a)
RAM
b)
ROM
c)
Keyboard
d)
Motherboard
53.
What is this piece of hardware?
a)
CPU
b)
Motherboard
c)
Computer/Tower
d)
Power Supply
54.
What does the hard drive do?
a)
Stores information temporarily 
b)
Gives Instructions
c)
Stores information permanently 
d)
Drives through the computer
55.
What does RAM stand for?
a)
Random Accurate Maps
b)
Really Awesome Memory
c)
Read Only Memory
d)
Random Access Memory
56.
RAM is what kind of memory?
a)
Permanant
b)
Forever
c)
Slow
d)
Temporary
57.
What Operating System is on a Microsoft computer?
a)
OSX
b)
CentOS
c)
Windows
d)
Android
58.
Identify the most common type of connector for a keyboard and mouse.
a)
a. USB
b)
b. VGA
c)
c. RJ-45
d)
d. DB-25
59.

The word bit comes from:

a)

Binary Digit

b)

Bivalue Digit

c)

Bionic Disign

d)

Binary Disign

e)

From being just a "bit" of information

60.

What is a bit?

a)

8 bytes

b)

The smallest amount of information

c)

The biggest amount of information

d)

The smallest part of a computer

61.

Which is a binary code

a)

The alphabet

b)

The Morse Code

c)

A True-False code

d)

The software

62.

Choose wisely

a)

1 bit = 8 byte

b)

1 byte = 8 bit

c)

1 bite = 8 byt

d)

1 byt = 8 bite

63.

21 in binary?

a)

010101

b)

101010

c)

000111

d)

101101

64.
Name the brand
a)
Volkswagen
b)
Audi
c)
Skoda
d)
Seat
65.
Name the brand
a)
Apple
b)
AMD
c)
Intel
d)
Motorola
66.
Name the brand
a)
Burger King
b)
KFC
c)
Wimpy
d)
McDonalds
67.
Name the team
a)
Portsmouth
b)
Southampton
c)
Bournemouth
d)
Brighton
68.
Name the brand
a)
Nike
b)
Addidas
c)
Puma
d)
Converse
69.
Name the brand
a)
Twitter
b)
Internet Explorer
c)
Facebook
d)
WhatsApp
70.
Name the brand
a)
YouTube
b)
MTV
c)
Yahoo
d)
Ebay
71.
Name the brand
a)
Bose
b)
Target
c)
Beats
d)
McDonalds
72.
Who's logo is this?
a)
Intel
b)
Apple
c)
Microsoft
d)
LG
73.
Who's logo is this?
a)
Loominous
b)
LG 
c)
Phone company
d)
PC
74.
Who's logo is this?
a)
IG(kik)
b)
Instagram
c)
Twitter
d)
Facebook
75.
Which operating system uses this logo?
a)
Windows 8
b)
iOS X
c)
LINUX
d)
UNIX
76.
What operating system uses this logo?
a)
Windows 8
b)
iOS X
c)
LINUX
d)
UNIX
77.
Which technology company uses this logo?
a)
Lime
b)
Orange
c)
Apple
d)
Apple Valley Orchards
78.
What is the Lightning connector for?
a)
Android phones
b)
Windows phones
c)
Apple phones/tablets
d)
Installing your own lightning conductor at home
79.
What does Android mean?
a)
An Apple phone
b)
A brand of tablet
c)
a brand of phone
d)
An operating system on a phone
80.
What type of wire connects to this?
a)
Firesale
b)
Firewire
c)
Serial cable
d)
Bonfire
81.
What does this mean?
a)
USA connector
b)
Mouse connector
c)
USB connector
d)
London Underground map

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