Programming

Question 1

What is the difference between a character and a string?

Answer 1

A character is one character, string can be multiple characters long

Question 2

What is declaration?

Answer 2

Creation of a variable

Question 3

What concept uses an IF statement?

Answer 3

selection

Question 4

What is meant by a nested IF statement?

Answer 4

If statements inside if statements

Question 5

Why should you use meaningful identifier names?

Answer 5

easier to read
easier to debug
less need for comments

Question 6

What is self-documenting code?

Answer 6

code which is written in such a way as to be easy
to read and understand by other programmers
without the need for extra documentation

Question 7

What 4 components make up a variable?

Answer 7

Memory address, identifier, data type, value

Question 8

What is an identifier for a variable?

Answer 8

How the variable is referred to in the code

Question 9

What is meant by concatenation?

Answer 9

Joining multiple strings together

Question 10

Why should you use subroutines

Answer 10

less duplication of code 
only need to change or update code once 
easier to read 
easier to debug 
subroutines can be re-used in other programs  workload can be split

Question 11

What is the name of a subroutine that doesn’t return a value?

Answer 11

Procedure

Question 12

What is the name of a subroutine that returns a value?

Answer 12

Function

Question 13

What does the scope of a variable mean?

Answer 13

Visibility of a variable

Question 14

What are the advantages of local variables?

Answer 14

uses less memory 
less likely to make assignment errors 
easier to debug 
identifier names can be re-used in other subroutines
subroutines can be re-used elsewhere

Question 15

What are the disadvantages of global variables?

Answer 15

uses more memory
more likely to make assignment errors
harder to debug
harder to come up with meaningful and unique identifier names
subroutines cannot be used in other programs

Question 16

What three things are stored in the stack frame?

Answer 16

return address
parameters
local variables

Question 17

Where are stack frames stored?

Answer 17

Call stack

Question 18

What is meant by a recursive function?

Answer 18

A function that calls itself

Question 19

What is meant by the base case of a recursive algorithm?

Answer 19

The case in which a recursive function does not call

itself

Question 20

What is meant by the general case of a recursive algorithm?

Answer 20

A case in which a recursive function calls itself