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 |
|---|---|---|
| ||
| ||
| ||
|
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Programming Fundamentals & Data Types (OCR GCSE Computer Science): Exam Questions
Exam code: J277
1 hour21 questions
22 marks
Jack’s program uses the addition (+) arithmetic operator.
This adds together two numbers.
State the purpose of each of the following arithmetic operators
*/
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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:
| Amaya |
|---|---|
| Taylor-Ling |
| 3 |
| Premium |
| False |
State the most appropriate data type for the following fields:
Nights | |
|---|---|
Room |
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
4b1 mark
Identify one item in the program that could have been written as a constant.
4c1 mark
Give one reason why you have identified this item as a constant.
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.
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6a2 marks
State what is meant by a real data type and give an example of this data type.
6b2 marks
State what is meant by an integer data type and give an example of this data type.
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71 mark
A programmer declares the following variables.
first = "Computer Science"
second = "is great"
State one difference between a variable and a constant.
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8a1 mark
Write a pseudocode statement to assign the value 7.3 to a variable with the identifier timer
8b1 mark
State the most appropriate data type for the variable timer.
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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 |
|---|---|---|
| ||
| ||
| ||
|
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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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2a1 mark
DIV and MOD are both operators used in computing-related mathematics.
State the value of 13 DIV 4
2b1 mark
State the value of 13 MOD 4
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31 mark
The symbol ^ is used for exponentiation.
Give the result of a^b when a = 3 and b = 2.
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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.
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53 marks
Tick (✓) one box in each row to identify the programming construct where each keyword is used.
Keyword | Programming construct | |
|---|---|---|
Selection | Iteration | |
| ||
| ||
| ||
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63 marks
The students are put into teams.
Students gain points depending on their result and the year group they are in.
The points are added to the team score.
The team with the most points at the end of the sports day wins.
Data about the teams and students is stored in a sports day program.
Identify the most appropriate data type for each variable used by the program.
Each data type must be different.
Variable | Example | Data type |
|---|---|---|
|
| |
|
| |
|
|
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14 marks
Identify and correct the errors in the Python program below.
Explain why each correction is necessary.
NAME = "Alice"
PI = 3.14159
name = "Bob"
NAME = "Charlie"
radius = 10
area = PI * radius ^ 2
print("The area of the circle is", area)
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22 marks
Modify the Python code to include a selection construct that only adds even numbers to the total.
total = 0
for i in range(5):
num = int(input("Enter a number: "))
total = total + num
print("Total is:", total)
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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 |
|---|---|
| |
| |
|
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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46 marks
Students take part in a sports day. The students are put into teams.
Students gain points depending on their result and the year group they are in. The points are added to the team score.
The team with the most points at the end of the sports day wins.
An algorithm works out which team has won (has the highest score).
Write an algorithm to:
Prompt the user to enter a team name and score, or to enter "stop" to stop entering new teams
Repeatedly take team names and scores as input until the user enters "stop"
Calculate which team has the highest score
Output the team name and score of the winning team in an appropriate message.
You must use either:
OCR Exam Reference Language, or
A high-level programming language that you have studied
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