Programming techniques (unit 11) (not finished)

Question 1

(11.1)What is an IDE?

Answer 1

Integrated Development Environment) is software which enables you to enter, edit, compile (or interpret) and run your programs

Question 2

(11.1)What features does an IDE have?

Answer 2

Clear, visible line numbers
Automatically indent code
Auto-complete commands
Comment or un-comment a section of code

Question 3

(11.1)What is a syntax errror?

Answer 3

an error in how the code is written, one of the rules is broken

Question 4

(11.1)What is a type error

Answer 4

An error in the expected type of data that is inputted, for example a word when it should be a number

Question 5

(11.1)What IDE tools help a programmer to write their code?

Answer 5

Auto-complete code when typing can avoid spelling mistakes
Code Colour highlighting - Can identify command words
Code comments and annotations
Multiple tabs
Import libraries

Question 6

(11.1)What IDE tools help a programmer to fix their code?

Answer 6

Stepping - Run one line at a time and check output slowly
Breakpoints - Stop the code at set points to check value of variable(s)
Variable watch window - Check variables values and how they change
Error reporting - report errors locations / give detail on errors
Crash dump , showing the state of variables at crash point
Line numbers to help find errors.

Question 7

(11.1)What is an algorithm?

Answer 7

An algorithm is a sequence of instructions that can be followed to solve a problem

Question 8

(11.1)What is pseudocode?

Answer 8

Pseudocode is used to write instructions in statements that are somewhere between English and a programming language

halfway language with no strict rules

Question 9

(11.1)What is an identifier

Answer 9

A name that points to a memory location

Question 10

(11.1)What is assignment?

Answer 10

assigning a value to the memory location

Question 11

(11.1)can the value of a variable be changed while the program is running?

Answer 11

Yes

Question 12

(11.1)Can the value of a constant be changed while the program is running?

Answer 12

No, it has be be changed in the source code and then recompiled

Question 13

(11.1)what is the use of a constant

Answer 13

to reduce the risk of errors by reducing the access to the memory location

Question 14

(11.2) How are IF, ELIF and ELSE conditional statements used in code?

Answer 14

allow the code to not always be top to bottom, as the conditions may make it move past a certain function or to another function

Conditional statements based on a given true or false statement

Question 15

What are relational/ comparison operators and what are some examples(11.2)

Answer 15

Compare 2 values/ variables

> 	greater than	
< 	less than
=> 	greater than or equal to
=< 	less than or equal to
== 	equal to	(= in some languages)
!= 	not equal to 	(<> in some languages)

Question 16

(11.2) What are the 3 main logic gates?

Answer 16

AND
OR
NOT

Question 17

(11.2) What does Nested if mean?

Answer 17

that the second condition (if) is only checked if the first condition is true

Question 18

(11.3) What 3 features must a programming language have to be a true programming language?

Answer 18

Sequence
Selection
Iteration

Question 19

(11.3) What is iteration?

Answer 19

iteration means repetition or loop

Question 20

(11.3) What types of loop are there?

Answer 20

while loop
do until loop
infinite loop
for loop

Question 21

(11.3) How does a while loop work

Answer 21

Using a while loop, the condition is tested upon entry to the loop

Question 22

(11.3) How does a do until loop work?

Answer 22

In a do until loop the statements in the loop are executed before the condition is evaluated

Question 23

(11.3) How does an infinite loop occur?

Answer 23

You may cause an infinite loop if you make a coding error

However, they can also be purposeful such as in 2D games

Question 24

(11.3) How does a for loop work

Answer 24

The for loop is sometimes called a count controlled loop and is used to repeat a some lines of code a specified number of times

Question 25

(11.4) what is a function?

Answer 25

a subroutine that returns a value