Programming Fundamentals & Data Types | OCR GCSE Computer Science Exam Questions 2020

14 marks

Tick (✓) one box in each row to identify whether the OCR Reference Language code given is an example of selection or iteration.

OCR Reference Language code	Selection	Iteration
`for i = 1 to 10 print(i) next i`
`while score != 0 playgame() endwhile`
`if playerHit() then score = 0 endif`
`switch bonus: case 0: score = 9 case 1: score = 7 case 2: score = 5 endswitch`

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22 marks

Jack’s program uses the addition (+) arithmetic operator.

This adds together two numbers.

State the purpose of each of the arithmetic operators in the table

Arithmetic operator	Purpose
*
/

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3a2 marks

Customers at a hotel can stay between 1 and 5 (inclusive) nights and can choose between a basic room or a premium room.

A typical booking record is shown in the table:

`firstName`	Amaya
`surname`	Taylor-Ling
`nights`	3
`room`	Premium
`stayComplete`	False

State the most appropriate data type for the following fields:

Nights
Room

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3b1 mark

Give the name of one field that could be stored as a Boolean data type.

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4a2 marks

A program is written to allow a user to enter the radius of a circle as a whole number between 1 and 30, then calculate and output the area of the circle.

Identify two variables used in the program

01 radius = 0

02 area = 0.0

03 radius = input("Enter radius")

04 if radius < 1 OR radius > 30 then

05 print("Sorry, that radius is invalid")

06 else

07 area = 3.142 * (radius ^ 2)

08 print (area)

09 endif

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4b1 mark

Identify one item in the program that could have been written as a constant.

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4c1 mark

Give one reason why you have identified this item as a constant.

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4d1 mark

Tick (✓) one box in each row to identify whether each programming construct has or has not been used in the program in part (a).

	Has been used	Has not been used
Sequence
Selection
Iteration

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51 mark

A teacher asks students how long they spend completing homework. Students answer in minutes and hours (for example 2 hours 15 minutes).

The teacher would like to create an algorithm that will display students’ inputs in minutes only.

Identify the input and output required from this algorithm.

Input
Output

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93 marks

OCR High School uses a computer system to store data about students’ conduct.

The system records good conduct as a positive number and poor conduct as a negative number.

A TRUE or FALSE value is also used to record whether or not a letter has been sent home about each incident.

An example of the data held in this system is shown below in Fig. 1:

StudentName	Detail	Points	LetterSent
Kirstie	Homework forgotten	−2	FALSE
Byron	Good effort in class	1	TRUE
Grahame	100% in a test	2	FALSE
Marian	Bullying	-3	TRUE

State the most appropriate data type used to store each of the following items of data.

StudentName
Points
LetterSent

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102 marks

Identify two basic programming constructs that have been used in this algorithm.

01 for k = 1 to 3

02 for p = 1 to 5

03 print (k + p)

04 next p

05 next k

06 m = 7

07 print m * m

1
2

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114 marks

An infinite loop is where a section of a program repeats indefinitely.

For each of the pseudocode algorithms shown below, tick the appropriate box to show whether they will loop infinitely or not.

Pseudocode	Will loop infinitely	Will not loop infinitely
`01 x = 0` `02 while True` `03 print x` `04 endwhile`
`01 x = 0` `02 while x < 10` `03 print x` `04 endwhile`
`01 x = 0` `02 while x < 10` `03 print x` `04 x = x + 1` `05 endwhile`
`01 y = 5` `02 for x = 1 to y` `03 print x` `04 next`

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12 marks

A teacher researches the length of time students spend playing computer games each day.

Tick (✓) one box to identify the data type you would choose to store the data and explain why this is a suitable data type.

Data Type	Tick (✓) one box
String
Integer
Real
Boolean

Explanation:

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42 marks

Each member of staff that works in a restaurant is given a Staff ID. This is calculated using the following algorithm.

01     surname = input("Enter surname") 

02     year = input("Enter starting year") 

03     staffID = surname + str(year) 

04     while staffID.length < 10 

05         staffID = staffID + "x" 

06     endwhile 

07     print("ID " + staffID)

Define the term casting and give the line number where casting has been used in the algorithm.

Definition
Line number

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3a3 marks

Identify the output of each print statement in the following Python program:

a = True

b = False

print(a and b)

print(a or b)

print(not a)

Statement	Output
`print(a and b)`
`print(a or b)`
`print(not a)`

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3b4 marks

Modify the code in part(a) to include a conditional that prints:

"Both are True" if both a and b are true

AND

"One is True" if either a or b is true but not both

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Programming Fundamentals & Data Types (OCR GCSE Computer Science)

Exam Questions