CS

Question 1

Describe the process of compiling an app:

Answer 1

A compiler permanently translates all of the source code into machine code instructions, identifying all of the errors in the code at the end of the translation.

Question 2

Explain how a computer system organises memory:

Answer 2

Each piece of data is stored in a separate location which has it’s own unique address

Question 3

What is the purpose of concatenation?

Answer 3

It joins 2 strings together

Question 4

State why predefined functions are used in testing:

Answer 4

Because if a predefined functions is used there is no need to code your own solution, therefore it is more time efficient

Question 5

Describe how extended ASCII code is used to represent characters.

Answer 5

Extended ASCII uses a code to represent characters as an 8-bit number, each character is given a different number to represent it

Question 6

What does GDPR state about data which is being stored in databases?

Answer 6

GDPR states that data should be limited to that needed for the declared purpose.

Question 7

How would you code to find out the number of items in an array?

Answer 7

event = [“hurdles”, “sprinting”, “high jump”]
Print(“there are”, len(event), “events”)

Question 8

What bus is uni-directional (only can go in one direction):

Answer 8

Address bus (PROCESSOR —> MEMORY)

Question 9

What bus is bi-directional? (Can go in both directions)

Answer 9

The data bus

Question 10

What is the code for importing random items from a 1-d array?

Answer 10

Import random
chararray=[“A”, “B”,”C”, “D”,”E”, “F”,”G”, “H”,”0”, “1”,”2”, “3”, “4”]
number=[0]*6
passcode=””

for counter in range(6):
number= random.randint(0,12)
passcode = (passcode + chararray[number])
print(passcode

Question 11

What does the data bus do?

Answer 11

• carries data from memory to be used by the processor
• carries data from the processor to be stored in memory

Question 12

What does the address bus do?

Answer 12

-tells memory which memory location is being read from
-tells memory which memory location is being written to

Question 13

Code the random function with an array:

Answer 13

Import random
Seats = [true, false, true, true, false]
SeatNumber = random.randint(1,60)
While Seats[SeatNumber] = false:
SeatNumber = random.randint(1,60)
Seats[SeatNumber] = false