Delphi MCQs (Chapterwise Multiple Choice Questions)

Which of the following is the correct code to "tick" a TCheckBox component called CheckBox1 as shown?

CheckBox1.Checked:=True;

CheckBox1.Ticked:=True;

CheckBox1.Tick(True);

CheckBox1.Enabled:=True;

Answer & Explanation

Correct Answer: CheckBox1.Checked:=True;

Note: This Question is unanswered, help us to find answer for this one

For a TQuery component called Query1 with SQL of "Select * from Student Where Number=500", which of the following is the correct method to run the query?

Query1.Active:=True;

Query1.RunSQL;

Query1.ExecuteAction(SQL);

Query1.ExecSQL;

Answer & Explanation

Correct Answer: Query1.Active:=True;

Note: This Question is unanswered, help us to find answer for this one

Which of the following is the correct method to activate a modal open dialog box when using the TOpenDialog component?

OpenDialog1.OpenFile;

OpenDialog1.GetFile;

OpenDialog1.Filename;

OpenDialog1.Execute;

Answer & Explanation

Correct Answer: OpenDialog1.Execute;

Note: This Question is unanswered, help us to find answer for this one

Which of the following will connect a DataSource to a Table where the Datasource component is call DataSource1 and the Table component is called Table1?

DataSource1.Table:=Table1;

DataSource1.DataSet:=Table1;

DataSource1.Source:=Table1;

DataSource1.SetTable(Table1);

Answer & Explanation

Correct Answer: DataSource1.DataSet:=Table1;

Note: This Question is unanswered, help us to find answer for this one

Which key toggles between the Object Inspector and the Edit Window / Form?

ALT + O

F11

F4

CTRL + ALT + TAB

Answer & Explanation

Correct Answer: F11

Note: This Question is unanswered, help us to find answer for this one

Which of the following is the correct code to create an object from class TMainForm?

Form.Create(TMainForm);

Application.CreateForm(TMainForm, MainForm);

TMainForm.CreateForm(MainForm);

MainForm:=Application.CreateFormInstance(TMainForm);

Answer & Explanation

Correct Answer: Application.CreateForm(TMainForm, MainForm);

Note: This Question is unanswered, help us to find answer for this one

What does the TDBLookupComboBox component do?

It allows a field value to be selected from a TList object specified by the programmer

It performs a search for a field with the same name as the text entered

It allows the selection of a database from a list of those found on a network

It identifies a set of field values in one dataset with a corresponding set of values from another dataset

Answer & Explanation

Correct Answer: It performs a search for a field with the same name as the text entered

Note: This Question is unanswered, help us to find answer for this one

What component is used to link two datasets in a master/detail relationship?

TTable

TDataSource

TMasterDetail

TDatabase

Answer & Explanation

Correct Answer: TDataSource

Note: This Question is unanswered, help us to find answer for this one

Given a ComboBox named ComboBox1 and an Edit box named Edit1, which of the following is the correct code to add the information in the Edit box to the drop down list in the ComboBox?

ComboBox1.Items.Add(Edit1.Text);

ComboBox1.Strings := ComboBox1.Strings + Edit1.Text;

ComboBox1.List.AddItem(Edit1.Text);

ComboBox1.Append(Edit1.Text);

Answer & Explanation

Correct Answer: ComboBox1.Items.Add(Edit1.Text);

Note: This Question is unanswered, help us to find answer for this one

Which of the following is NOT an event of the TApplicationEvents component?

OnActionExecute

OnBusy

OnMessage

OnHint

OnException

OnSettingChange

Answer & Explanation

Correct Answer: OnBusy

Note: This Question is unanswered, help us to find answer for this one

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