State diagrams in Software Engineering - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the sentence to define a state in a state diagram.

Software Engineering

A state in a state diagram represents a [1] of an object during its life.

Drag options to blanks, or click blank then click option'

Aevent

Bcondition

Ctransition

Daction

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing state with event or action.

Thinking a state is a transition.

A state represents a condition or situation during the life of an object in a state diagram.

2fill in blank

medium

Complete the sentence to explain what triggers a transition in a state diagram.

Software Engineering

A transition between states is triggered by a [1] that causes a change.

Drag options to blanks, or click blank then click option'

Astate

Bstate machine

Cevent

Dcondition

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'state' instead of 'event'.

Confusing condition with event.

An event triggers a transition, causing the object to move from one state to another.

3fill in blank

hard

Fix the error in the description of a state diagram element.

Software Engineering

In a state diagram, a [1] represents the movement from one state to another.

Drag options to blanks, or click blank then click option'

Atransition

Bstate

Cevent

Daction

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'state' instead of 'transition'.

Confusing event with transition.

A transition represents the movement or change from one state to another in a state diagram.

4fill in blank

hard

Fill both blanks to complete the description of actions in state diagrams.

Software Engineering

An action is performed [1] a transition and is triggered by a [2].

Drag options to blanks, or click blank then click option'

Aduring

Bbefore

Cevent

Dstate

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up 'before' and 'during'.

Confusing 'state' with 'event' as trigger.

Actions are performed during a transition and are triggered by an event in a state diagram.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension that maps states to their possible next states based on events.

Software Engineering

state_transitions = [1]: [2] for event in events if event [3] 'start'}}

Drag options to blanks, or click blank then click option'

A'Idle'

B'Running'

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '=='.

Swapping 'Idle' and 'Running' states.

This comprehension maps the 'Idle' state to the 'Running' state for events that equal 'start'.