Programming

Question 1

What is a constant?

Answer 1

value that stays the same throughout the running of the program.

Question 2

What is a variable?

Answer 2

A name/symbol which represents a value in a

program and .points to a memory location: A value that changes during the programs execution.

Question 3

What is a sequence?

Answer 3

one instruction after another

Question 4

What is a selection?

Answer 4

A condition is used to decide whether code should be executed (if/case)

Question 5

What is an iteration?

Answer 5

A process or sequence that is repeated usually in the form of a loop (for/loop/repeat)

code is executed repeatedly

Question 6

What are two examples of low level language?

Answer 6

assembly language and machine code

Question 7

A translator is needed to…

Answer 7

converts high-level languages into machine code. (compilers and interpreters)

Question 8

What does an IF/THEN/ELSE statement do?

Answer 8

allows you to select an option from several options

Question 9

What does a CASE statement do?

Answer 9

for coding multiple choices in a program

Question 10

What is an algorithm?

Answer 10

a process or set of rules to be followed to complete a task e.g. flow charts or pseudocode

Question 11

What is high level code?

Answer 11

code which is close to human languages e.g. python

Question 12

What is Machine code?

Answer 12

a language directly understood by the CPU, instructions are represented by a string of bits

Question 13

What is an interpreter and a compiler?

Answer 13

converts high level code into machine code

Question 14

What is an assembler?

Answer 14

coverts assembly language into machine code

Question 15

What is a for loop?

Answer 15

repeats a group of steps a specified number of times

Question 16

What is a repeat loop?

Answer 16

controlled by condition at the end of the loop

Question 17

What is a while loop?

Answer 17

controlled by a condition at the start of the loop

Question 18

What is the difference between a string and a character data type?

Answer 18

• string contains multiple characters

Question 19

What is a real(float) number?

Answer 19

a number with a decimal point

Question 20

What is a boolean data type?

Answer 20

a true/false yes/no 0/1 data type

Question 21

What is a syntax error?

Answer 21

a problem with the language that the translators do not understand e.g. spelling

Question 22

What is a logical error?

Answer 22

The program is written to do something other than what the programmer intended

e.g. an infinate loop, division by 0 or a wrong data type

Question 23

What is integrated development environment (IDE)?

Answer 23

a software package that helps you write code more easily

e.g. colour coding key words and numbering lines

Question 24

What is run-time environment?

Answer 24

provides the screen +feedback when you try to run a program

Question 25

What is auto-documentation?

Answer 25

the computer uses the data as well as comments to generate a text file

Question 26

What is an array?

Answer 26

a list

Question 27

What is the difference between compilers and interpreters?

Answer 27

a compiler runs the object code whereas an interpreter runs the source code

Question 28

What is a compiler used for?

Answer 28

distribution of software

Question 29

What is a interpreter used for?

Answer 29

development of software

Question 30

What is an Opcode?

Answer 30

single instruction that can be executed by the CPU.

Question 31

What is an Operand?

Answer 31

supplies the data needed for the operation code

Question 32

What is an array?

Answer 32

An array is a data structure that contains a group of elements. each individual variable is given an index which it is referred to within the array.

Question 33

How does the IDE help the programmer correct errors?

Answer 33

error messages/ translator diagnostics produced when translating by the computer
an editor allows you enter the corrected code
tries to tell you when the errors are by highlight the errors

Question 34

What does the editing tool do in the IDE?

Answer 34

• allows you to enter program code
• colour codes key words
• auto-completes codes as you type

Question 35

What does the compiler tool do in the IDE?

Answer 35

translates the code into machine code

Question 36

What does the de-bugging tool do in the IDE?

Answer 36

highlights errors