Question 1

DIV (floor division, quotient)

Accepted Answer

Integer division

Question 2

MOD

Accepted Answer

Provides the remainder

Question 3

Concatenation

Accepted Answer

Joining strings together PS: string_1 + string_2 etc.

Question 4

Length of string

Accepted Answer

PS: string_name.length 
P: Len(string_name)

Question 5

Substring

Accepted Answer

PS: string_name.subString(start pos, no. characters)

Question 6

Declaring an array

Accepted Answer

PS: array_name(items separated by commas)

Question 7

accessing an item in an array

Accepted Answer

PS: print(array[position])

Question 8

length of an array

Accepted Answer

PS: array_length=array_name.length

Question 9

Declaring a 2D array

Accepted Answer

PS: array array_name(rows, columns)

Question 10

Accessing data in a record

Accepted Answer

PS: array_records[index].filename

Question 11

Changing data in a record

Accepted Answer

PS: array_records[index].filename = data (what to overwrite)

Question 12

SQL

Accepted Answer

Structured Query Language

Question 13

SELECT

Accepted Answer

Which record or row to take data from

Question 14

FROM

Accepted Answer

Which array/ field to take data from

Question 15

WHERE

Accepted Answer

Under what conditions should the record be chosen/returned?

Question 16

Random number generation

Accepted Answer

PS: num <-- RANDOM_INT(1,6)
P: import random
    dice = random.randint(1,6)

Question 17

Sub programs

Accepted Answer

Smaller sections of code embedded into the main program

Question 18

Procedures

Accepted Answer

Carry out a task and provide structure to code.

Question 19

Functions

Accepted Answer

Carry out a task and return values to be used in the main program. Can be used to create re useable program components.

Question 20

Array

Accepted Answer

A variable with a single identifier that can store multiple items of data (of the same data type), and includes an index (position).

Question 21

Variable

Accepted Answer

Items of data that can change while the program is running. (reserves an area of memory to store its contents)

Question 22

Constant

Accepted Answer

a value that cannot change while the program is running but still uses an identifier name.

Question 23

Decleration

Accepted Answer

Stating the names of the variable to be used. Need to identify the data type.

Question 24

Assignment

Accepted Answer

setting the value of a variable/constant

Question 25

Programming construct

Accepted Answer

a way of building/  constructing code.

Question 26

Sequence

Accepted Answer

The order that things happen, running the program from start to finish

Question 27

Selection

Accepted Answer

choosing between possible actions through 'if' statements

Question 28

Iteration

Accepted Answer

repeating actions using loops (FOR or WHILE)

Question 29

Counter controlled iteration

Accepted Answer

set number of repeats using a FOR loop.

Question 30

Condition controlled iteration

Accepted Answer

repeats a set of actions while the condition is true using WHILE loops.

Question 31

Operator

Accepted Answer

a character/ characters that determine the action or process.

Question 32

Exponentiation

Accepted Answer

indices (using ^)

Question 33

Casting

Accepted Answer

converting from one data type to another

Question 34

Text file

Accepted Answer

contains plain text with no formatting to store data. can be read from and put into RAM.

Question 35

Delimiter

Accepted Answer

Separates data (usually with a comma) in a line.

Question 36

Line numbers

Accepted Answer

start at one but not stored in the text file

Question 37

Procedure code

Accepted Answer

PS: procedure name  (...)
...
end procedure

Question 38

Calling a procedure

Accepted Answer

PS: procedure(parameters)

Question 39

Function code

Accepted Answer

PS: function name(...)
...
return ...
end function

Question 40

Calling a function

Accepted Answer

PS: function(parameters)

Question 41

Functions in python

Accepted Answer

def function_name():
...

Question 42

Reading text files

Accepted Answer

myFile = openRead(filename)
file data = myFile.readLine()
myFile.close()

Question 43

Why do you always have to close a file?

Accepted Answer

So other users can access it and to save RAM space.

Question 44

Reading files into an array

Accepted Answer

for line = 1 to 6
array_name[line -1] = myFile.readLine()
next line
myFile.close()

Question 45

reading a whole file

Accepted Answer

for line 1 to 41
filedata = myFile.readLine()
print(file data)
nextline
myFile.close()

Question 46

writing to a text file

Accepted Answer

myfile = openWrite(filename)
myFile = writeLine(data)
myFile.close()

Question 47

write a line into CSV

Accepted Answer

data_for_file = ''...,'' + variable + etc.
filename.writeLine(data_for_file)

Question 48

Creating files

Accepted Answer

createFile(filename)

Question 49

Open file

Accepted Answer

myFile = openRead()
myFile = openWrite()

Question 50

close file

Accepted Answer

myFile.close()

COMPUTER SCIENCE 2.2

Programming techniques unit OCR EXAM BOARD

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