Class 6 Computer Science

1. 1.Tap the system unit — the box that holds the processor and the memory.

   Write the number of the part.

2. 2.Match each part to the job it does.

   • Monitor
   • Keyboard
   • Speaker
   • Mouse
   • Printer

   • Shows words and pictures on a screen
   • Lets you type letters and numbers
   • Moves the pointer and clicks
   • Plays sound out loud
   • Puts your work onto paper

3. 3.You type 7 + 5, the computer adds it up, and 12 appears on the screen. Put the three stages in the order they happen.

   • Output
   • Input
   • Process

4. 4.A computer does every job in the same three stages. Which list has them in the right order?

   • a) Input, process, output
   • b) Process, output, input
   • c) Output, input, process
   • d) Input, output, process

5. 5.Tap the part you would use to type your name.

   Write the number of the part.

6. 6.A part of a computer you can pick up and touch is called hardware. What do we call the instructions the computer follows, which you cannot touch at all?

7. 7.Tap the monitor — the part that shows you what the computer is doing.

   Write the number of the part.

8. 8.On a desktop computer, sort each part by where it lives.

   Groups: Inside the system unit · Outside, plugged in

   • Hard disk
   • Processor
   • Speaker
   • Keyboard
   • Scanner
   • RAM

Parts of a computer · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.A touchscreen shows you a picture, and you can also tap it to give a command. Which is true of it?

   • a) It is only an output device
   • b) It is only an input device
   • c) It is an input device and an output device
   • d) It is neither, because it has no cable

2. 2.A device that carries information back out of the computer to you is called an ______ device. Fill in the missing word.

3. 3.A device that carries information into the computer is called an ______ device. Fill in the missing word.

4. 4.A barcode reader takes the pattern of lines on a packet and sends it into the computer. Which kind of device is it?

   • a) Both at once
   • b) Neither of those
   • c) An output device
   • d) An input device

5. 5.Which of these is NOT an input device?

   • a) Mouse
   • b) Monitor
   • c) Scanner
   • d) Microphone

6. 6.Which of these is NOT an output device?

   • a) Printer
   • b) Monitor
   • c) Speaker
   • d) Keyboard

7. 7.Match each device to what it carries.

   • Microphone
   • Speaker
   • Scanner
   • Printer
   • Keyboard

   • Sound coming out
   • A picture coming out
   • Sound going in
   • Letters going in
   • A picture going in

8. 8.A pair of headphones takes sound out of the computer and carries it to your ears. Which kind of device is it?

   • a) Both at once
   • b) Neither of those
   • c) An input device
   • d) An output device

Input and output devices · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.Put these units of information in order, smallest first.

   • Megabyte
   • Bit
   • Terabyte
   • Kilobyte
   • Byte
   • Gigabyte

2. 2.Match each unit to how many of the next unit down it holds.

   • 1 byte
   • 1 kilobyte
   • 1 megabyte
   • 1 gigabyte

   • 1024 megabytes
   • 1024 kilobytes
   • 1024 bytes
   • 8 bits

3. 3.One kilobyte is 1024 bytes. A short note takes 2048 bytes. How many kilobytes is the note?

4. 4.One megabyte is 1024 kilobytes. A photograph is 2 megabytes. How many kilobytes is that?

5. 5.One byte is made of 8 bits. How many bits are there in 5 bytes?

6. 6.One byte is made of 8 bits. How many bits are there in 12 bytes?

7. 7.Each letter you type takes one byte, and one byte is 8 bits. How many bits does a word of 6 letters take?

8. 8.Which of these units is the largest?

   • a) Kilobyte
   • b) Gigabyte
   • c) Megabyte
   • d) Byte

Storage and memory · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "1011" as an ordinary number?

2. 2.Write the ordinary number 5 in binary, using only 0s and 1s.

3. 3.Work out what each binary number means, then sort it by whether that ordinary number is odd or even.

   Groups: Odd · Even

   • 1011
   • 101
   • 10
   • 111
   • 1000
   • 110

4. 4.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "110" as an ordinary number?

5. 5.How many different values can a single bit hold?

   • a) 2
   • b) 10
   • c) 8
   • d) 1

6. 6.Write the ordinary number 12 in binary, using only 0s and 1s.

7. 7.Which of these is the ordinary number 9 written in binary?

   • a) 110
   • b) 1010
   • c) 1001
   • d) 1100

8. 8.Put these binary numbers in order, smallest first.

   • 11
   • 1
   • 10
   • 111
   • 100

Bits and binary numbers · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.A file is saved at "Music/Songs/Old/anthem.mp3". Which folder is the file sitting directly inside?

2. 2.Sort each name by whether it is a file or a folder. A file always ends with a dot and a few letters.

   Groups: File · Folder

   • Science
   • Downloads
   • song.mp3
   • photo.jpg
   • report.docx
   • Projects

3. 3.You have forty pictures and thirty pieces of writing loose in one place, and you can never find anything. What is the sensible thing to make?

   • a) One very long file name for every file
   • b) A second copy of every file
   • c) Two folders, and move each file into the right one
   • d) Nothing — long lists are easier to search

4. 4.You rename "story.txt" to "story.jpg" without changing anything inside it. What have you actually changed?

   • a) The file has become a real picture
   • b) The file has been deleted
   • c) The file has become twice as large
   • d) Only the name — the writing inside the file is untouched

5. 5.A file is saved at "Home/Art/paint.jpg". Starting from the outside, how many folders must you open to reach the file?

   • a) 3
   • b) 4
   • c) 1
   • d) 2

6. 6.This is a folder tree. Tap the folder that the file sums.doc is sitting directly inside.

   Write the number of the part.

7. 7.In the same folder tree, tap the outermost folder — the one that holds everything else.

   Write the number of the part.

8. 8.A file is saved at "School/Maths/sums.doc". Which folder is the file sitting directly inside?

Files and folders · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.Some steps just do something. Others ask a question first and go one way or the other. Sort each step.

   Groups: Just does something · Asks a question first

   • If the box is empty, fill it
   • Add 5 to the total
   • Show the answer on the screen
   • If the answer is right, say well done
   • If the total is over 20, stop
   • Double the number

2. 2.Which of these describes an algorithm best?

   • a) Another name for the keyboard
   • b) A picture of what a program will look like
   • c) A machine that runs inside the computer
   • d) A list of clear steps, in order, that finishes the job

3. 3.Another algorithm says: start with 4, then add 3, then double it. What number do you end with?

4. 4.Put these steps in the order a computer runs them to add two numbers and show the total.

   • Show the total on the screen
   • Read the two numbers
   • Add the two numbers together

5. 5.An algorithm says: start with 12, then halve it, then halve it. What number do you end with?

6. 6.Match each short algorithm to the number it ends with.

   • Start with 3, then double it
   • Start with 3, then add 4
   • Start with 10, then halve it
   • Start with 4, then double it
   • Start with 4, then multiply it by 3

   • 8
   • 7
   • 5
   • 6
   • 12

7. 7.Why must every algorithm come to an end?

   • a) Because the screen would run out of room
   • b) Because every algorithm must have exactly five steps
   • c) Because computers can only hold ten steps at a time
   • d) Because a set of steps that never finishes never gives an answer

8. 8.An algorithm says: start with 20, then halve it, then take away 3. What number do you end with?

What is an algorithm? · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.Which shape marks the beginning and the end of a flowchart? Answer with the name of the shape.

2. 2.How many arrows come out of a decision symbol?

   • a) 1
   • b) 2
   • c) 3
   • d) 4

3. 3.A flowchart reads a number, doubles it and prints the result. Put its steps in the order they are drawn, top to bottom.

   • Start
   • Stop
   • Print the result
   • Double the number
   • Read the number

4. 4.Tap the symbol used when the flowchart has to ask a question and go one of two ways.

   Write the number of the part.

5. 5.Why does a flowchart use four different shapes instead of drawing every step as a rectangle?

   • a) Because the computer refuses to read rectangles
   • b) Because each shape holds a different amount of writing
   • c) So the flowchart takes up less room on the page
   • d) So you can see what kind of step each one is without reading it

6. 6.Tap the symbol that starts and ends a flowchart.

   Write the number of the part.

7. 7.Tap the symbol used for a step that works something out, such as adding two numbers.

   Write the number of the part.

8. 8.A flowchart has a diamond with the question "Is the number more than 10?" written in it. What must be written on the two arrows leaving it?

   • a) Start and Stop
   • b) Yes on one and No on the other
   • c) Nothing at all
   • d) Two numbers

Flowchart symbols · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.A flowchart sets a total to 0. Each time round it adds 5 to the total, and it goes round 4 times. What is the total at the end?

2. 2.A flowchart sets a counter to 0. Each time round it adds 1 to the counter, then asks whether the counter is 6. If the answer is No it goes round again. How many times does it add 1 before it stops?

3. 3.A flowchart reads a number, doubles it and prints it. Put the boxes in the order they are visited.

   • Double the number
   • Read the number
   • Print the result
   • Stop
   • Start

4. 4.A flowchart sets a total to 0. Each time round it adds 3 to the total, and it goes round 7 times. What is the total at the end?

5. 5.What would go wrong if one arrow out of a decision diamond led nowhere?

   • a) Anyone following that answer would be stuck with no next step
   • b) The other arrow would stop working too
   • c) The flowchart would run twice as fast
   • d) Nothing — a diamond only ever needs one arrow

6. 6.A flowchart reads a number. If the number is more than 10, it prints "Big". If not, it prints "Small". The number read is 7. What does the flowchart print?

7. 7.A flowchart reads a number. If the number is more than 10, it prints "Big". If not, it prints "Small". The number read is 15. What does the flowchart print?

8. 8.A flowchart reads a number. If the number is more than 20, it prints "Big". If not, it prints "Small". The number read is 44. Which arrow out of the diamond is taken?

   • a) The Yes arrow
   • b) Neither of them
   • c) The No arrow
   • d) Both of them

Following a flowchart · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.A program sets a total to 0. It repeats this 3 times: add 10 to the total. What is the total at the end?

2. 2.A program sets a total to 100. It repeats this 5 times: take 20 away from the total. What is the total at the end?

3. 3.Follow this code by hand. What is total at the end?

   total = 0
   for i in range(0, 4):
       total = total + 6

4. 4.A program needs to print a star one hundred times. Why is a loop better than writing the printing step out one hundred times?

   • a) It makes the stars appear in a different order
   • b) Loops are the only way a computer can print anything
   • c) It is far shorter, and changing the number changes it everywhere at once
   • d) It uses one hundred times less memory to store a star

5. 5.A program sets a total to 7. It repeats this 4 times: add 2 to the total. What is the total at the end?

6. 6.A program repeats this 4 times: print 3 stars. How many stars are printed?

7. 7.A program sets a total to 0. It repeats this 5 times: add 4 to the total. What is the total at the end?

8. 8.A program sets a number to 2, then doubles it three times over. Put the values the number holds in order, from the start to the end.

   • 4
   • 16
   • 8
   • 2

Repeating with loops · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.A program says: if the number is equal to 6, print "Six"; otherwise print "Not six". The number is 8. What does the program print?

2. 2.A program says: if the number is less than 5, print "Low"; otherwise print "High". The number is 5. What does the program print?

3. 3.A program says: if the mark is at least 40, print "Pass"; otherwise print "Fail". The mark is 39. What does the program print?

4. 4.Is 7 more than 10?

   • a) Sometimes
   • b) Yes
   • c) There is no way to tell
   • d) No

5. 5.A program tests a number and takes one of its two branches. In a single run, how many of the two words does it print?

   • a) One
   • b) Two
   • c) It changes each time
   • d) None

6. 6.Sort each of these statements by whether it is true or false.

   Groups: True · False

   • 5 is less than 2
   • 8 is more than 3
   • 4 is more than 4
   • 9 is more than 2
   • 10 is less than 10
   • 7 is equal to 7

7. 7.A program says: if the number is more than 10, print "Big"; otherwise print "Small". The number is 7. What does the program print?

8. 8.A program says: if the mark is at least 40, print "Pass"; otherwise print "Fail". The mark is 40. What does the program print?

Making decisions in programs · Class 6 Computer Science · www.arenapublications.com/learn

1. 1.In the line "<b>Arena</b> is a school", which single word will a browser show in bold?

2. 2.Here is some HTML: "<ul><li>Tea</li><li>Milk</li><li>Sugar</li></ul>". How many items are in the list?

3. 3.An element opens with the tag "<b>". Write the tag that closes it.

4. 4.Here is some HTML: "<ul><li>Red</li><li>Green</li></ul>". How many items are in the list?

5. 5.Here is a line of HTML: "<p>Hello</p>". Every element has an opening tag and a closing tag. Write the closing tag from that line.

6. 6.Sort each tag by whether it opens an element or closes one.

   Groups: Opening tag · Closing tag

   • <p>
   • </li>
   • <h1>
   • </h1>
   • </p>
   • <li>

7. 7.Which one of these is a closing tag?

   • a) </h1>
   • b) <h1>
   • c) h1
   • d) <h1

8. 8.In the line "<h1>Welcome</h1>", which single word will a browser show as the heading?

Reading HTML tags · Class 6 Computer Science · www.arenapublications.com/learn