Heath is researching how long, to the nearest minute, each student in his class spends playing computer games in one week (Monday to Friday). He is storing the data in a 2D array. Fig. 2 shows part of the array, with 4 students. For example, student 1, on Monday (day 0), played 30 minutes of computer games. He wants to output the number of minutes student 3 played computer games on Wednesday (day 2). He writes the code: print (hoursPlayed[3,2]) The output is 20. Write an algorithm to output the total number of minutes student 0 played computer games from Monday (day 0) to Friday (day 4). There are 3 marks available: - Adding all correct elements - Outputting correctly - Using a loop Example Code: total = 0 for x = 0 to 4 ...total = total + hoursPlayed[0,x] next x print (total) Which line initialises a counter to allow the elements to be added correctly?

...total = total + hoursPlayed[0,x]

Heath is researching how long, to the nearest minute, each student in his class spends playing computer games in one week (Monday to Friday). He is storing the data in a 2D array. Fig. 2 shows part of the array, with 4 students. For example, student 1, on Monday (day 0), played 30 minutes of computer games. He wants to output the number of minutes student 3 played computer games on Wednesday (day 2). He writes the code: print (hoursPlayed[3,2]) The output is 20. Write an algorithm to output the total number of minutes student 0 played computer games from Monday (day 0) to Friday (day 4). There are 3 marks available: - Adding all correct elements - Outputting correctly - Using a loop Example Code: total = 0 for x = 0 to 4 ...total = total + hoursPlayed[0,x] next x print (total) Which lines control the loop? Answers: 2

...total = total + hoursPlayed[0,x]

Heath is researching how long, to the nearest minute, each student in his class spends playing computer games in one week (Monday to Friday). He is storing the data in a 2D array. Fig. 2 shows part of the array, with 4 students. For example, student 1, on Monday (day 0), played 30 minutes of computer games. He wants to output the number of minutes student 3 played computer games on Wednesday (day 2). He writes the code: print (hoursPlayed[3,2]) The output is 20. Write an algorithm to output the total number of minutes student 0 played computer games from Monday (day 0) to Friday (day 4). There are 3 marks available: - Adding all correct elements - Outputting correctly - Using a loop Example Code: total = 0 for x = 0 to 4 ...total = total + hoursPlayed[0,x] next x print (total) Which line adds the hours played within the loop?

...total = total + hoursPlayed[0,x]

Heath is researching how long, to the nearest minute, each student in his class spends playing computer games in one week (Monday to Friday). He is storing the data in a 2D array. Fig. 2 shows part of the array, with 4 students. For example, student 1, on Monday (day 0), played 30 minutes of computer games. He wants to output the number of minutes student 3 played computer games on Wednesday (day 2). He writes the code: print (hoursPlayed[3,2]) The output is 20. Write an algorithm to output the total number of minutes student 0 played computer games from Monday (day 0) to Friday (day 4). There are 3 marks available: - Adding all correct elements - Outputting correctly - Using a loop Example Code: total = 0 for x = 0 to 4 ...total = total + hoursPlayed[0,x] next x print (total) Which line outputs the result?

...total = total + hoursPlayed[0,x]

Heath is researching how long, to the nearest minute, each student in his class spends playing computer games in one week (Monday to Friday). He is storing the data in a 2D array. Heath needs to work out the average number of minutes spent playing computer games each day for the class, which contains 30 students. Write an algorithm to output the average number of minutes the whole class spends playing computer games each day. There are 6 marks available: - Loop 0 to 29 - Loop 0 to 4 - Accessing hoursplayed[x,y] - Addition of hoursplayed[x,y] to total - Calculating average correctly outside of loops - Outputting the results An example answer can be seen in the image. Which line reads the value from the array using an index?

......Total = total + hoursPlayed[x,y]

Heath is researching how long, to the nearest minute, each student in his class spends playing computer games in one week (Monday to Friday). He is storing the data in a 2D array. Heath needs to work out the average number of minutes spent playing computer games each day for the class, which contains 30 students. Write an algorithm to output the average number of minutes the whole class spends playing computer games each day. There are 6 marks available: - Loop 0 to 29 - Loop 0 to 4 - Accessing hoursplayed[x,y] - Addition of hoursplayed[x,y] to total - Calculating average correctly outside of loops - Outputting the results An example answer can be seen in the image. Why is average calculated outside of the loop? Answers: 2

The average only needs to be calculated once

It can only be calculated once the total has been added

It should have been calculated inside the loop for more marks

Willow has created a hangman program that uses a file to store the words the program can select from. A sample of this data is shown in Fig. 3. [crime, bait, fright, victory, nymph, loose] Show the stages of a bubble sort when applied to data shown in Fig. 3. What will be the order after the first swap?

[ bait , crime , fright, victory, nymph, loose]

[bait, crime, fright, nymph , victory , loose]

[bait, crime, fright, nymph, loose , victory ]

[bait, crime, fright, loose , nymph , victory]

Willow has created a hangman program that uses a file to store the words the program can select from. A sample of this data is shown in Fig. 3. [crime, bait, fright, victory, nymph, loose] Show the stages of a bubble sort when applied to data shown in Fig. 3. What will be the order after the second swap?

[bait, crime, fright, nymph , victory , loose]

[ bait , crime , fright, victory, nymph, loose]

[bait, crime, fright, nymph, loose , victory ]

[bait, crime, fright, loose , nymph , victory]

Willow has created a hangman program that uses a file to store the words the program can select from. A sample of this data is shown in Fig. 3. [crime, bait, fright, victory, nymph, loose] Show the stages of a bubble sort when applied to data shown in Fig. 3. What will be the order after the third swap?

[bait, crime, fright, nymph, loose , victory ]

[ bait , crime , fright, victory, nymph, loose]

[bait, crime, fright, nymph , victory , loose]

[bait, crime, fright, loose , nymph , victory]

Willow has created a hangman program that uses a file to store the words the program can select from. A sample of this data is shown in Fig. 3. [crime, bait, fright, victory, nymph, loose] Show the stages of a bubble sort when applied to data shown in Fig. 3. What will be the order after the fourth and final swap?

[bait, crime, fright, loose , nymph , victory]

[ bait , crime , fright, victory, nymph, loose]

[bait, crime, fright, nymph , victory , loose]

[bait, crime, fright, nymph, loose , victory ]

Willow has created a hangman program that uses a file to store the words the program can select from. A sample of data is shown in Fig. 4. [amber, house, kick, moose, orange, range, tent, wind, zebra] Show the stages of a binary search to find the word 'zebra' when applied to the data shown in Fig. 4. Why would the first step be: Compare zebra to orange

Orange is the middle value in the list

Orange is the first value in the list

Orange is the final value in the list

Jim is writing a program to calculate the wages of workers in a teddy bear factory. The wages earned by a worker is either £2 for every teddy bear they have made or £5 for every hour they have worked, whichever is larger. Write an algorithm that: - allows the user to input the number of teddy bears made and the number of hours worked - calculates the wages for the number of teddy bears made - calculates the wages for the - number of hours worked - outputs the larger of the two results. There are 6 marks available. Inputting teddybears and hours 2 * number of teddy bears 5 * hours Comparing the two answers Outputting the piece rate if it is greater Outputting the hour rate if it is greater. Which line(s) gains the marks for: Inputting teddybears and hours

If PerTeddyBear > PerHour THEN ...OUPUT PerTeddyBear

Jim is writing a program to calculate the wages of workers in a teddy bear factory. The wages earned by a worker is either £2 for every teddy bear they have made or £5 for every hour they have worked, whichever is larger. Write an algorithm that: - allows the user to input the number of teddy bears made and the number of hours worked - calculates the wages for the number of teddy bears made - calculates the wages for the - number of hours worked - outputs the larger of the two results. There are 6 marks available. Inputting teddybears and hours 2 * number of teddy bears 5 * hours Comparing the two answers Outputting the piece rate if it is greater Outputting the hour rate if it is greater. Which line(s) gains the marks for: 2 * number of teddy bears 5 * hours Answers: 3

If PerTeddyBear > PerHour THEN ...OUPUT PerTeddyBear

Jim is writing a program to calculate the wages of workers in a teddy bear factory. The wages earned by a worker is either £2 for every teddy bear they have made or £5 for every hour they have worked, whichever is larger. Write an algorithm that: - allows the user to input the number of teddy bears made and the number of hours worked - calculates the wages for the number of teddy bears made - calculates the wages for the - number of hours worked - outputs the larger of the two results. There are 6 marks available. Inputting teddybears and hours 2 * number of teddy bears 5 * hours Comparing the two answers Outputting the piece rate if it is greater Outputting the hour rate if it is greater. Which line(s) gains the marks for: Comparing the two answers

If PerTeddyBear > PerHour THEN ...OUPUT PerTeddyBear

Jim is writing a program to calculate the wages of workers in a teddy bear factory. The wages earned by a worker is either £2 for every teddy bear they have made or £5 for every hour they have worked, whichever is larger. Write an algorithm that: - allows the user to input the number of teddy bears made and the number of hours worked - calculates the wages for the number of teddy bears made - calculates the wages for the - number of hours worked - outputs the larger of the two results. There are 6 marks available. Inputting teddybears and hours 2 * number of teddy bears 5 * hours Comparing the two answers Outputting the piece rate if it is greater Outputting the hour rate if it is greater. Which line(s) gains the marks for: Outputting the piece rate if it is greater Outputting the hour rate if it is greater. Answers: 2

If PerTeddyBear > PerHour THEN ...OUPUT PerTeddyBear

Julie is writing a computer game that simulates a 100 m race. Each time the space bar is pressed, the position of the player moves up by 1. When the position reaches 100, the player has won. Here is Julie's algorithm for the program (see image) Make the game more interesting, Julie changes the rules. Each time the spacebar is pressed, the position of the player will now move up by a random number. State changes that need to be made to include this new rule. Justify each change. Example Change: "Position = Position + 1 should be changed" Which justification best matches this?

...so the increment is a random number

...so the game remains interesting

... as the position may not reach exactly 100 due to the random number.

... so that numbers generated appear random

Julie is writing a computer game that simulates a 100 m race. Each time the space bar is pressed, the position of the player moves up by 1. When the position reaches 100, the player has won. Here is Julie's algorithm for the program (see image) Make the game more interesting, Julie changes the rules. Each time the spacebar is pressed, the position of the player will now move up by a random number. State changes that need to be made to include this new rule. Justify each change. Example Change: "The random number should be relatively small" Which justification best matches this?

...so the game remains interesting

...so the increment is a random number

... as the position may not reach exactly 100 due to the random number.

... so that numbers generated appear random

Julie is writing a computer game that simulates a 100 m race. Each time the space bar is pressed, the position of the player moves up by 1. When the position reaches 100, the player has won. Here is Julie's algorithm for the program (see image) Make the game more interesting, Julie changes the rules. Each time the spacebar is pressed, the position of the player will now move up by a random number. State changes that need to be made to include this new rule. Justify each change. Example Change: "The end condition of the loop should be changed to UNTIL Position > 100 / check if position > 100 and if so change to 100" Which justification best matches this?

... as the position may not reach exactly 100 due to the random number.

...so the increment is a random number

...so the game remains interesting

... so that numbers generated appear random

Julie is writing a computer game that simulates a 100 m race. Each time the space bar is pressed, the position of the player moves up by 1. When the position reaches 100, the player has won. Here is Julie's algorithm for the program (see image) Make the game more interesting, Julie changes the rules. Each time the spacebar is pressed, the position of the player will now move up by a random number. State changes that need to be made to include this new rule. Justify each change. Example Change: "seed / initialise random number generation" Which justification best matches this?

... as the position may not reach exactly 100 due to the random number.

...so the increment is a random number

...so the game remains interesting

... so that numbers generated appear random

A free drinks machine in an office provides 20 different drinks. The machine has a small keypad with keys 0 to 9, OK and CANCEL. It also has a small LCD screen, which can display a short message. To get a drink, users select an item number between 1 and 20 with the keypad and confirm their choice by pressing OK. If they make a mistake they can press the CANCEL button and start again. If the selection is valid and the drink is available it dispenses the drink. The display screen is used to show suitable short messages throughout the process. Write an algorithm for the process described above. An example solution is shown in the image. What is this line of code doing and why? .....Choice = Choice & Button Answers: 2

The choice may contain two numbers

Concatenating the last button pressed to the string choice

The choice will only contain one number

A computer program calculates the correct dose in grams of a type of medicine. The algorithm used is shown by the flow diagram below. diagram to calculate the correct dose of medicine for a male aged 30. You must show your working. Answers: 4

(Age < 20 is FALSE so) Dose = 2

(Gender = "Female" is FALSE) so Dose = Dose * 0.5

(Age < 20 is TRUE so) Dose = 0.1

A computer program calculates the correct dose in grams of a type of medicine. The algorithm used is shown by the flow diagram below. Use the flow diagram to calculate the correct dose of medicine for a pregnant female aged 19. You must show your working. Answers: 4

(Age is less than 20 = true) so Dose = 0.1 * Age

[is Pregnant AND Dose > 1.5 ] is TRUE

(Age < 20 is False so) Dose = 2

2.1 Algorithms (Past Questions) Quiz

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

There is a subroutine, HEX(), that takes a denary number between 10 and 15 and returns the corresponding hexadecimal number. E.g. HEX(10) would return "A", HEX(15) would return "F".

Write an algorithm, using the subroutine HEX(), to convert any whole decimal number between 0 and 255 into a 2 digit hexadecimal number.

The image contains an example answer.

There were four marks available:
- Taking a number as input
- Using HEX subroutine correctly
- Calculating Digit 1
- Calculating Digit 2

Which line(s) of code earned mark: Taking a number as input

INPUT decimal

digitl = decimal DIV 16

IF digitl>=10 THEN

...digit1 = HEX(digit1)

IF digit2>=10 THEN

...digit2=HEX(digit2)

digit2 = decimal - (digit1*16)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

There is a subroutine, HEX(), that takes a denary number between 10 and 15 and returns the corresponding hexadecimal number. E.g. HEX(10) would return "A", HEX(15) would return "F".

Write an algorithm, using the subroutine HEX(), to convert any whole decimal number between 0 and 255 into a 2 digit hexadecimal number.

The image contains an example answer.

There were four marks available:
- Taking a number as input
- Using HEX subroutine correctly
- Calculating Digit 1
- Calculating Digit 2

Which line(s) of code earned mark: Using HEX subroutine correctly

INPUT decimal

digitl = decimal DIV 16

IF digitl>=10 THEN

...digit1 = HEX(digit1)

IF digit2>=10 THEN

...digit2=HEX(digit2)

digit2 = decimal - (digit1*16)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

There is a subroutine, HEX(), that takes a denary number between 10 and 15 and returns the corresponding hexadecimal number. E.g. HEX(10) would return "A", HEX(15) would return "F".

Write an algorithm, using the subroutine HEX(), to convert any whole decimal number between 0 and 255 into a 2 digit hexadecimal number.

The image contains an example answer.

There were four marks available:
- Taking a number as input
- Using HEX subroutine correctly
- Calculating Digit 1
- Calculating Digit 2

Which line(s) of code earned mark: Calculating Digit 1

INPUT decimal

digitl = decimal DIV 16

IF digitl>=10 THEN

...digit1 = HEX(digit1)

IF digit2>=10 THEN

...digit2=HEX(digit2)

digit2 = decimal - (digit1*16)

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

There is a subroutine, HEX(), that takes a denary number between 10 and 15 and returns the corresponding hexadecimal number. E.g. HEX(10) would return "A", HEX(15) would return "F".

Write an algorithm, using the subroutine HEX(), to convert any whole decimal number between 0 and 255 into a 2 digit hexadecimal number.

The image contains an example answer.

There were four marks available:
- Taking a number as input
- Using HEX subroutine correctly
- Calculating Digit 1
- Calculating Digit 2

Which line(s) of code earned mark: Calculating Digit 2

INPUT decimal

digitl = decimal DIV 16

IF digitl>=10 THEN

...digit1 = HEX(digit1)

IF digit2>=10 THEN

...digit2=HEX(digit2)

digit2 = decimal - (digit1*16)

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Johnny is writing a program to create usernames. The first process he has developed is shown in the flowchart in Fig. 1.

[Start]
↓
[Input firstname]
↓
[Input surname]
↓
[name = LEFT(firstName, 3)]
↓
[username = name + left(Surname,2)]
↓
[OUTPUT username]
↓
[Stop]

For example, using the process in Fig. 1, Tom Ward's user name would be TomWa.

State, using the process in Fig. 1, the username for Rebecca Ellis.

RebEl

EllRe

ElReb

ReEll

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Johnny has updated the process used to create usernames as follows:

If the person is male, then their username is the last 3 letters of their surname and the first 2 letters of their first name.

If the person is female, then their username is the first 3 letters of their first name and the first 2 letters of their surname.

What would be the username for a male called Fred Biscuit using the updated process?

UitFr

FreBi

FrUit

BiFre

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Johnny has updated the process used to create usernames as follows:

If the person is male, then their username is the last 3 letters of their surname and the first 2 letters of their first name.

If the person is female, then their username is the first 3 letters of their first name and the first 2 letters of their surname.

Write an algorithm for Johnny to output a username using the updated process.

An example answer can be seen in the image.

There were six marks available:
- Taking firstname, surname and gender as input
- Checking IF gender is male / female (using appropriate selection)
- For male ...Generating last 3 letters of surname using appropriate string manipulation
- ...Generating first 2 of letters of firstname and adding to previous
- For female.... correctly calculating as before
- Correct concatenation and output

Which line(s) earned the mark: - Taking firstname, surname and gender as input

input firstname, surname, gender

if gender = "Male" then

else

...username = RIGHT(surname, 3) + LEFT(firstname,2)

...username = LEFT (firstname,3) + LEFT(surname,2)

8.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Johnny has updated the process used to create usernames as follows:

If the person is male, then their username is the last 3 letters of their surname and the first 2 letters of their first name.

If the person is female, then their username is the first 3 letters of their first name and the first 2 letters of their surname.

Write an algorithm for Johnny to output a username using the updated process.

An example answer can be seen in the image.

There were six marks available:
- Taking firstname, surname and gender as input
- Checking IF gender is male / female (using appropriate selection)
- For male ...Generating last 3 letters of surname using appropriate string manipulation
- ...Generating first 2 of letters of firstname and adding to previous
- For female.... correctly calculating as before
- Correct concatenation and output

Which line(s) earned the mark: - Checking IF gender is male / female (using appropriate selection)

Answers: 2

input firstname, surname, gender

if gender = "Male" then

else

...username = RIGHT(surname, 3) + LEFT(firstname,2)

...username = LEFT (firstname,3) + LEFT(surname,2)

9.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Johnny has updated the process used to create usernames as follows:

If the person is male, then their username is the last 3 letters of their surname and the first 2 letters of their first name.

If the person is female, then their username is the first 3 letters of their first name and the first 2 letters of their surname.

Write an algorithm for Johnny to output a username using the updated process.

An example answer can be seen in the image.

There were six marks available:
- Taking firstname, surname and gender as input
- Checking IF gender is male / female (using appropriate selection)
- For male ...Generating last 3 letters of surname using appropriate string manipulation
- ...Generating first 2 of letters of firstname and adding to previous
- For female.... correctly calculating as before
- Correct concatenation and output

Which of the marks did the following line earn?
...username = RIGHT(surname, 3) + LEFT(firstname,2)

Answers: 3

For male ...Generating last 3 letters of surname using appropriate string manipulation

...Generating first 2 of letters of firstname and adding to previous

For female.... correctly calculating as before

.Correct concatenation

Output

10.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Johnny has updated the process used to create usernames as follows:

If the person is male, then their username is the last 3 letters of their surname and the first 2 letters of their first name.

If the person is female, then their username is the first 3 letters of their first name and the first 2 letters of their surname.

Write an algorithm for Johnny to output a username using the updated process.

An example answer can be seen in the image.

There were six marks available:
- Taking firstname, surname and gender as input
- Checking IF gender is male / female (using appropriate selection)
- For male ...Generating last 3 letters of surname using appropriate string manipulation
- ...Generating first 2 of letters of firstname and adding to previous
- For female.... correctly calculating as before
- Correct concatenation and output

Which of the marks did the following line earn?
print (username)

Answers: 1

For male ...Generating last 3 letters of surname using appropriate string manipulation

...Generating first 2 of letters of firstname and adding to previous

For female.... correctly calculating as before

.Correct concatenation

Correct Output

2.1 Algorithms (Past Questions)

51 questions

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