IST - Software Development Control Structures

Question 1

What are the 2 types of loop

Answer 1

Pre-test loop

Post-test loop

Question 2

Show a Pre-test loop

Answer 2

WHILE test condition is TRUE
do process
END WHILE

Question 3

Show a Post-Test Loop

Answer 3

statement before loop
REPEAT
process statements 
UNTIL condition is TRUE
statement after loop

Question 4

What are the 7 datatypes

Answer 4

Character Data- Holds one character eg. H - as
String Data- Holds multiple characters eg. bird
Integer Data- Holds whole numbers- as int
Real numbers- Holds decimals- As double, As single
Boolean- True/False
Date and Time- Holds dates and time
Binary Data- holds large data such as movies

Question 5

What form do you write an algorithm

Answer 5

Pseudo code or Flowchart

Question 6

What are the 3 types of control structure

Answer 6

Sequence- one event after the other
Selection- casewhere - binary selection
Repetition- Post test loop - pre test loop

Question 7

Show a pseudo code example of a sequence control structure

Answer 7

BEGIN
process 1
process 2
END

Question 8

Show a pseudo code example of a binary selection control structure

Answer 8

IF  = True THEN
      do process 1
ELSE 
      do process 2
END IF

Question 9

Show a pseudo code example of a casewhere control structure

Answer 9

CASEWHERE
choice 1: process 1
choice 2: process 2
otherwise: Default process

ENDCASE