2.1.7 Programming

Question 1

What is an algorithm?

Answer 1

A set of instructions to solve a problem

Question 2

What is a logic error?

Answer 2

When the program works but not as it’s supposed to

Question 3

What is a syntax error?

Answer 3

When there is an error with the code itself

Question 4

What is high level code?

Answer 4

They are codes we are able to read and understand. E.g. Java, Python and C

Question 5

What is machine code?

Answer 5

Binary code that computers understand, as they cant understand high level code

Question 6

What is opcode?

Answer 6

The instruction that the CPU has to execute

Question 7

What is operand?

Answer 7

The data that is stored by the CPU

Question 8

What do translators do?

Answer 8

They convert source code into machine code

Question 9

What are the three types of translators?

Answer 9

Interpreters and compilers and assemblers

Question 10

What does an interpreter do?

Answer 10

Takes each line of high level code, converts it and runs it. The CPU executes each instruction before it moves on to the next instruction

Question 11

What does a compiler do?

Answer 11

Converts all high level code into machine code and executes it in one go. Once the code has been compiled it can run as often as needed at a higher speed.

Question 12

What does an assembler do?

Answer 12

Translates assembly language into machine code. Its written in mnemonics, which is a low level language that closely represents the operations of the CPU

Question 13

What does sequence mean?

Answer 13

Code executing line by line, from top to bottom

Question 14

What does selection mean?

Answer 14

An if statement

Question 15

What does iteration mean?

Answer 15

Loops

Question 16

What are the three types of control flow?

Answer 16

Sequence, selection and iteration

Question 17

What is a variable?

Answer 17

An adaptable storage location

Question 18

What is a constant?

Answer 18

Similar to a variable except its not expected to change

Question 19

What is a local variable?

Answer 19

A variable within a subroutine, that is only usable within that subroutine

Question 20

What is a global variable?

Answer 20

A variable outside a subroutine, in the normal/main script of the code

Question 21

What is a temporary variable?

Answer 21

Generally found in loops, to be used and discarded

Question 22

What are the 4 (5) data types?

Answer 22

String - Alphanumeric data
Integer - Whole numbers
Boolean - True or False
Float - Decimal number
Character - A single character

Question 23

What is destructive testing?

Answer 23

Testing designed to break the program

Question 24

What is a good data?

Answer 24

Data that the code should expect

Question 25

What is bad data?

Answer 25

Data that the code wouldn’t expect

Question 26

What is boundary data?

Answer 26

Data close the what the program would expect

Question 27

What is null data?

Answer 27

Nothing at all