Oracle Oracle Certifications 1Z0-151 Questions & Answers

• Question 81:

  You want to display employee records in tabular format, but the form is not wide enough to display all the items in the Employees block. The employee IDs and names of displayed records should always be visible, but you want to scroll the additional information as users tab through the Items, the form should look like a spreadsheet with the first two columns frozen.

  Which canvas types would be most appropriate in this scenario?

  A. content canvas in a window with a horizontal scroll bar

  B. content canvas and multiple tab canvases

  C. content canvas and a tab canvas with multiple tab pages

  D. content canvas and a stacked canvas with a horizontal scroll bar

  E. multiple content canvases

  Correct Answer: C

  After an entity is divided into groups, if all groups cannot be displayed simultaneously, it becomes necessary for two or more regions to be displayed in the exact same space, one at a time, using a Tab control. The user can jump to a specific region by selecting a tab or by progressing continuously through all fields of all Tab regions. A set of fields, minimally the primary key fields, should remain visible so the user can maintain context at all times. There, "frozen" fields must be placed inside the Tab control on the left side. When best to use Tab regions:

  *

  When the user must see all fields of a record in a single window, but they do not need to see them all simultaneously.

  *

  When entire regions need to be hidden from a user due to security restrictions, the current state of data, or other product installations.

• Question 82:

  The Orders database table uses Order_id as its primary key. You have written the following code to use in the Orders block of a form:

  SELECT orders_seq.NEXTVAL INTO :orders.order_id FROM SYS.dual;

  Which statement is true about this code?

  A. If you place this Code in a trigger that fires when the record is inserted into the database, you will likely have more gaps in Order IDs than if you use the sequence as a default value for the item.

  B. If you place this code in a trigger, you should ensure that Order_Id has its required property set to Yes.

  C. If you place this code in a trigger, you should ensure that Order_Id has its Database Item property set to No.

  D. If the named sequence does not exist, it is automatically created the first time the code is called.

  E. You should place this code a in a database trigger to minimize the gaps in Order IDs.

  F. You should place this code in Pre-insert trigger to minimize the gaps in Order IDs.

  G. You should place this code in a Post_insert trigger to minimize the gaps in Order IDs.

  Correct Answer: F

  Assigning Sequence Numbers to Records You will recall that you can assign default values for items from an Oracle sequence, to automatically provide unique keys for records on their creation. However, if the user does not complete a record, the assigned sequence number is "wasted." An alternative method is to assign unique keys to records from a Pre-Insert trigger, just before their insertion in the base table, by which time the user has completed the record and issued the Save. Assigning unique keys in the posting phase can:

  *

  Reduce gaps in the assigned numbers

  *

  Reduce data traffic on record creation, especially if records are discarded before saving

  Example

  This Pre-Insert trigger on the ORDERS block assigns an Order ID from the sequence ORDERS_SEQ,

  which will be written to the ORDER_ID column when the row is subsequently inserted.

  SELECT ORDERS_SEQ.nextval

  INTO :ORDERS.order_id

  FROM SYS.dual;

• Question 83:

  You are implementing a JavaBean in a form, the bean has no visible component on the form when invoked, the bean displays an input text where users enter a zip code, the bean has a single method that returns a short weather forecast for that zip code as a character value.

  How can you retrieve that value so that you can display it to the user?

  A. Use FBEAN.ENABLE_EVENT to register a listener for the bean event. Obtain the value of SYSTEM.CUSTOM_ITEM_EVENT in a When-Custom item Event trigger, and then use that value as an argument to the MESSAGE built in.

  B. Use FBEAN.REGISTER_BEAN as an argument to the MESSAGE built in to invoke the bean's method and return the value as a message displayed to the user.

  C. Use FBEAN.REGISTER_BEAN to register the bean, so that when the user enters a zip code into the bean s input text, the value is automatically displayed in the bean area item.

  D. Use FBEAN.ENABLE_EVENT to register a listener for the bean event. Obtain the value of SYSTEM.CUSTOM_EVENT_PARAMETER in a When_Custom-item-Event trigger, and then use that value as an argument to the MESSAGE built-in.

  Correct Answer: D

  When a user interacts with a JavaBean at run time, it usually causes an event to occur. You can use FBEAN.ENABLE_EVENT to register a listener for the event, so that when the event occurs Forms will fire the When-Custom-Item-Event trigger. In this trigger, you can code a response to the event. The :SYSTEM.CUSTOM_ITEM_EVENT and :SYSTEM.CUSTOM_EVENT_PARAMETERS variables contain the name of the event and information the bean is sending to the form.

• Question 84:

  View the Exhibit.

  

  Iin the Human Resources form shown in the Exhibit, you want to modify the prompts, heights, and widths of the Department Id, Manager Id, and Location Id Holds in the Departments data block.

  What must you select before invoking the Layout Wizard in reentrant mode to modify these item properties?

  A. Frame5

  B. Frames

  C. Canvas4

  D. the Departments block

  E. the DEPARTMENT_ID, MANAGER_ID and LOCATION_ID items

  Correct Answer: C

  From the exhibit we see that Department Id, Manager Id, and Location Id are all present on Canvas4.

• Question 85:

  The Order Entry application contains several forms. The inventories form uses an LOV that is based on a record group that queries the Warehouses table to return a warehouse ID. Several of the forms use LOVs that are based on the same query. You decide to centralize the creation of the record group to the entry form of the application, which opens all the other forms, for example, to open the inventories form, there is a When-Button Pressed trigger on the inventories button with the following code;

  OPEN _FORM ('inventories');

  in a When-New-Form-instance trigger for the entry form, you create the warehouse_rg record group by

  using the CREATE_GROUP_QUERY built in with the following arguments:

  ('warehouse_rg' , 'SELECT ALL WAREHOUSE.WAREHOUSE_ID, WAREHOUSE.WAREHOUSE_NAME FORM WAREHOUSE order by warehouse_name);

  You also populate the record group in this trigger.

  What must you do to make this record group available to the inventories form and the other forms?

  A. in the When-New-Form-instance trigger for the entry form, add a values for the SCOPE argument of CREATE_GROUP_QUERY.

  B. in the entry form, move the record group code to the end of the When-Button-Pressed triggers for the buttons that open other forms, so that the record group is created and populated immediately after OPEN_FORM is called.

  C. in the entry form, move the record group code to the beginning of the When-Button-Pressed triggers for the button that open other forms, so that the record group is created and populated just before OPEN_FORM is called.

  D. in the When-Button_Pressed triggers of the entry from the buttons that open other forms, add a value for the SESSION argument of OPEN_FORM.

  E. in the other forms, refer to the record group as: global.warehouse_rg.

  Correct Answer: A

  Note: The CREATE_GROUP_FROM_QUERY built-in is a function and must be invoked as part of an

  expression. For example:

  DECLARE

  rg_id RecordGroup;

  BEGIN

  rg_id := CREATE_GROUP_FROM_QUERY ('employee_rg', 'SELECT id,first_name,last_name,sal FROM

  employee');

  END;

• Question 86:

  The Orders form has four blocks. The Orders and Order_items block are on the CV_Order content canvas;

  the inventories block items are on the CV_inventories content canvas; and Control block buttons are on the

  CV_Buttons toolbar canvas. All buttons have mouse Navigate set to No.

  The Order_Items block is a detail of Orders. The inventories block is a detail of Order_Items, showing the

  stock of the selected product.

  There is a button in the Control block with a When-Button-Pressed trigger:

  IF GET_CANVAS_PROPERTY(:SYSTEM.cursor_item, item_canvas) = 'CV_ORDER' THEN GO_BLOCK

  ('inventories')

  ELSE

  GO_BLOCK('orders');

  END IF;

  When you run the form and click the button, navigation does not occur, and the form displays the runtime

  error "FRM-41053: Cannot find Canvas: invalid ID." What should you do to correct this problem?

  A. Change the sequence of blocks in the Object Navigator

  B. Chang the Mouse Navigator property of the button to yes

  C. in the first line of code, change the built-in to GET_ITEM_PROPERTY

  D. in the first line of code, change the system variable to: SYSTEM.CURSOR_CANVAS.

  E. in the first line of code, change the CV_ORDER to lowercase

  F. Chang the argument to the GO_BLOCK built-ins to uppercase

  Correct Answer: D

  Note: GET_CANVAS_PROPERTY built-in Description Returns the given canvas property for the given canvas. . Syntax FUNCTION GET_CANVAS_PROPERTY( canvas_id Canvas ,property NUMBER);FUNCTION GET_CANVAS_PROPERTY( canvas_name VARCHAR2 ,property NUMBER)

• Question 87:

  Which four types of variables must have their names preceded by a colon when they are referenced in trigger code?

  A. PL/SQL variables

  B. Form items

  C. global variables

  D. system variables

  E. parameters

  Correct Answer: ABCD

  D: Example:

  On calling the

  raiseEvent method, a trigger named WHEN-CUSTOM-JAVASCRIPT-EVENT is fired on the server side.

  declare

  event_val varchar2(300):= :system.javascript_event_value; begin

  if (:system.javascript_event_name='show') then

  handleShowEvent(event_val);

  elsif(:system.javascript_event_name='grab') then

  handleGrabEvent(event_val);

  else

  null;

  end if;

  end;

• Question 88:

  You have a text item in your form named Object1. You want to create Object2 as an exact duplicate of Object1. You want to be able to change the properties of Object2. However if you change Object1, you do not want Object2 to change.

  Which method of reusing Object1 would be best for these requirements?

  A. Copying Object1

  B. Subclassing Object1

  C. Creating a property class from Object1

  D. Putting Object1 in an Object library

  E. Referencing Object1 in a PL/SQL library

  Correct Answer: A

  When you copy an object, a separate, unique version of that object is created in the target module. Any objects owned by the copied object also get copied. Changes made to a copied object in the source module do not affect the copied object in the target module.

  Incorrect answers:

  B: With subclassing you can make an exact copy, and then alter the properties of some objects if desired.

  If you change the parent class, the changes also apply to the properties of the subclassed object that you

  have not altered. However, any properties that you override remain overridden.

  This provides a powerful object inheritance model.

• Question 89:

  When tabbing through items in the Employees form, users should not be able to navigate to the Salary text item. If they need to update the item, they will have to explicitly navigate to it by using the mouse.

  Which property setting accomplishes this requirement?

  A. Enabled = Yes; Keyboard Navigable = No

  B. Enabled = No; Keyboard Navigable = Yes

  C. Enabled = Yes; Keyboard Navigable = Yes

  D. Enabled = No; Keyboard Navigable = No

  E. Automatic Skip = Yes

  Correct Answer: C

  *

  Keyboard Navigable property Description Determines whether the end user or the application can place the input focus in the item during default navigation. When set to Yes for an item, the item is navigable. When set to No, Form Builder skips over the item and enters the next navigable item in the default navigation sequence. The default navigation

  sequence for items is defined by the order of items in the Object Navigator. Applies to all items except chart items and display items

  *

  Default Yes Usage Notes If Enabled or Visible is set to No (PROPERTY_FALSE for runtime), then the items' or item instance's Keyboard navigable property is effectively false. At runtime, when the Enabled property is set to PROPERTY_FALSE, the Keyboard_Navigable property is also set to PROPERTY_FALSE. However, if the Enabled property is subsequently set back to PROPERTY_TRUE, the keyboard Navigable property is NOT set to PROPERTY_TRUE, and must be changed explicitly.

• Question 90:

  The Credit_Rating item in the Customers block of an Order Entry form must be restricted to three possible values: Good, Poor, or Null (the latter value indicates that the credit rating has not been determined). Order entry clerks must be able to update this item to any of the preceding three values.

  You want to change the item to a check box labeled "Credit Risk" that should be selected if the customer has poor credit, the check box should not be selected if the customer's credit rating is good or undetermined.

  

  You change the item type to Checkbox, set other properties as shown in the Exhibit, and then run your form and insert three records: two with good credit and the check box deselected, and one with poor credit and the check box selected. You commit the data and query the records, with the following result set:

  

  The first two records show an undetermined credit rating, although your intention was to set the value to Good for these customers. What change must you make in the properties of the Credit_Ratinq item to enable values of Good, Poor, and Null to be entered?

  A. Change the initial Value property to Good.

  B. Change the Check Box Mapping of Other Values property to Not Allowed.

  C. Change the initial Value property to Good and the Value When Unchecked property to Null.

  D. Change the initial Value property to Good and the Chock Box Mapping of Other Valued property to Null.

  E. Change the initial Value property to Good and the Check Box Mapping of Other Values property to checked.

  F. Change the item type. It is not appropriate to use a check box to enable entry and update of more than two values in an item.

  Correct Answer: E

  

  Incorrect answers:

  F: A check box is not limited to two values.