Knowledge quiz

It's time to put what you've learned to the test, get 8 right to pass this unit.

Is the following statement regarding the difference between actions and functions correct? Functions modify data on the server, actions retrieve data.

Choose the correct answer.

True

False

Which elements of an entity are suitable for use as an ETag element for optimistic locking?

Choose the correct answer.

each element

Elements that are never updated.

Elements whose content changes uniquely each time a data record is updated.

Elements that hold foreign keys.

What are after event handlers normally used for?

Choose the correct answer.

for modifying inbound data

for committing database transactions

for enriching outbound data

for validating user input

What kinds of event handlers are available in CAP that can be registered for different phases during the processing of an event?

There are three correct answers.

init handlers

on handlers

after handlers

exit handlers

before handlers

How can you start debugging a CAP project in the SAP Business Application Studio?

There are three correct answers.

by selecting Run → Start Debugging from the menu

by executing the command cds debug start in the terminal

by setting a breakpoint in the source code and then executing the cds watch command in the terminal

by pressing the F5 function key

by selecting the Play button for the cds serve configuration in the Run and Debug view

Assume you want to define an Authors entity as a projection on the db.Authors entity from the domain model. All elements of the db.Authors domain entity are to be included in the projection with the exception of the books element. Which of the following syntax variants is the correct one to achieve this?

Choose the correct answer.

entity Authors as projection on db.Authors﹛ * ﹜excluding books;

entity Authors as projection on db.Authors﹛ * ﹜excluding﹛ books ﹜;

entity Authors as projection on db.Authors﹛ *, excluding books ﹜;

entity Authors as projection on db.Authors﹛ * ﹜﹛ excluding books ﹜;

Which annotation must be added to an element of a model entity to enable ETags for this entity?

Choose the correct answer.

@etag

@odata.etag

@odata

@etag.odata

What is the @assert.target annotation used for in CAP?

Choose the correct answer.

for setting a value for an element of an entity

for ensuring that the value of an element of an entity matches a specified format

for checking for managed to-one associations of an entity whether the entity to which the association refers exists

for ensuring that the value of an element of an entity is within a specified value range

What is the expected outcome when a PUT request is made with an outdated ETag value?

Choose the correct answer.

The request fails with status code 412 (Precondition Failed).

The request is processed and the data is updated.

CAP automatically updates the outdated ETag value to match the current value.

The request is ignored without any error.

10.

What arguments do after event handlers receive?

There are two correct answers.

an instance of cds.Request

the user's credentials

a function that allows the handler to pass control to the subsequent after handler

the outcomes of the on handler which ran before