Unit 3 Revision

Open Ended

Can you list 5 data types

Multiple Choice

What is 5 + 100 / 5

• 20
• 21

• 15
• 25

Multiple Choice

What is (90 - 9) / 9

• 9
• 11

• 10
• 1

Multiple Choice

29 MOD 10

• 3

• 2

• 9
• 10

Multiple Choice

16 DIV 3

• 1

• 5

• 6

• 3

Multiple Choice

((20 + 4) /3) DIV 5

• 3
• 1
• 5

• 2

Open Ended

What is the difference between a constant and a variable?

Open Ended

Give two reasons why you should give meaningful names to constants and variables

Open Ended

What is concatenation?

Match

Match the following

word = "Computer"

• LENGTH (word)

• SUBSTRING (word,2,4)

• LCASE(word)

• UCASE(word)

8

ompu

computer

COMPUTER

• 8

• ompu

• computer

• COMPUTER

Open Ended

Name the three basic control structures in programming

S...

S...

I...

Multiple Choice

x = ?

• a

• b

Multiple Choice

x = ?

• c

• d

Multiple Choice

x = ?

• e

• f

Open Ended

On the left is a question, with some code to start a program to ask the question. The correct answer is '2'.

Write a selection statement to output “Correct!” if the user enters the correct answer, or “No, it’s the Pacific” if the user enters the wrong answer.

Open Ended

Write an IF statement involving a Boolean operator (AND, OR or NOT) which performs the same function as the following nested IF statement:

Open Ended

This FOR loop should find and print the largest number in an array numbers of ten positive integers.

It contains an error. Find and correct the error

Open Ended

Write the corrected algorithm using a WHILE loop instead of a FOR loop.

Open Ended

This is a program to draw circles in random colours, sizes and positions on the screen. A random number generator is used to generate a colour number which she allocates to red, yellow, green or blue.

What datatype is the variable colour?

Open Ended

Using an example for the program, what is meant by Selection?

Open Ended

Using an example from the program, what is meant by ITERATION?

Open Ended

What does the statement colourNumber ← ROUND(RANDOM()*3 + 1,0) do?

Open Ended

An array colourArray could be used instead of the CASE statement to assign colours to the variable colour. The index of the array starts at 1.

What would the array contain?

Open Ended

Write a statement to assign the string "red" to element 1 in the array

Open Ended

INPUT answer

has an input placed into the variable 'answer'

Enter a line of code to make sure the answer is in title case (first character upper case, rest lower case)?

Open Ended

This is a 2D array for a quiz.

The first column of the 2-D array stores the question, whilst the next three columns give the optional answers. The final column stores the correct answer from the three given.

Questions[1,2] would refer to the array item that contained “How many legs does a spider have?”

Write pseudocode which will show question 2, allow the user to write an answer and then check if the user is correct. If the user gives the correct answer, then output “Correct”, otherwise output “Incorrect”.

The program only needs to accept the correct answer number as stored in the 2-D array, it doesn’t need to accept the text answer.