UiPath Updated UiPath-ADPv1 Exam Questions and Answers by roux

The DataTable object in UiPath is a representation of a table with rows and columns that can store data of various types. It has a Columns property that returns a collection of DataColumn objects that describe the schema of the table1. To extract the column names from a DataTable and store them in a list, you can use the following query:

dt.Columns.Cast(Of Datacolumn).Select(function(x) x.ColumnName).ToList()

This query does the following:

It casts the Columns collection to a generic IEnumerable(Of DataColumn) using the Cast(Of T) extension method2. This is necessary because the Columns collection is a non-generic IEnumerable that cannot be used with LINQ methods directly3.

It selects the ColumnName property of each DataColumn object using the Select extension method and a lambda expression4. The ColumnName property returns the name of the column as a string5.

It converts the resulting IEnumerable(Of String) to a List(Of String) using the ToList extension method6.

The other options are incorrect because:

Option B does not cast the Columns collection to a generic IEnumerable(Of DataColumn), which will cause a runtime error.

Option C uses the AsEnumerable extension method, which returns a collection of DataRow objects, not DataColumn objects7. Therefore, the ColumnName property will not be available.

Option D selects the whole DataColumn object instead of its ColumnName property, which will result in a list of DataColumn objects, not strings.

References:

DataTable Class (System.Data) | Microsoft Docs

Enumerable.Cast(Of TResult) Method (System.Linq) | Microsoft Docs

DataColumnCollection Class (System.Data) | Microsoft Docs

Enumerable.Select(Of TSource, TResult) Method (System.Linq) | Microsoft Docs

DataColumn.ColumnName Property (System.Data) | Microsoft Docs

Enumerable.ToList(Of TSource) Method (System.Linq) | Microsoft Docs

DataTableExtensions.AsEnumerable Method (System.Data) | Microsoft Docs

The Extract PDF Page Range activity is used to extract a specific set of pages from a PDF file and save them as a new PDF file1. The activity has the following properties:

•Common

oDisplayName: The display name of the activity1.

•File

oFileName: The path of the PDF file you want to extract a range of pages from. This field supports only strings and String variables1.

oOutputFileName: The name you want to use for the file that is generated from the extracted range of pages. This field supports only strings and String variables1.

oPassword: The password of the PDF file, if necessary. This field supports only strings and String variables1.

•Input

oRange: The range of pages that you want to retrieve. You can specify a single page (e.g. “7”), a range of pages (e.g. “7-12”), or a complex range, (e.g. “2-5, 7, 15-End” or “All”). Only string variables and strings are supported. By default, this field is cleared1.

•Misc

oPrivate: If selected, the values of variables and arguments are no longer logged at Verbose level1.

The statement that correctly describes this activity is B. Range argument accepts complex range values or “All”. This statement is true because the Range property allows you to specify the pages that you want to extract from the PDF file using different formats, such as single pages, ranges, or complex ranges1. You can also use the keyword “All” to extract all the pages from the PDF file1.

The other statements are incorrect because:

•A. Password-protected PDF files cannot be processed with this activity. This statement is false because the activity has a Password property that allows you to enter the password of the PDF file, if necessary1. This enables the activity to process password-protected PDF files1.

•C. OutputFileName argument is optional. This statement is false because the OutputFileName property is required for the activity to work1. This property specifies the name of the file that is generated from the extracted range of pages1. If this property is not provided, the activity will throw an exception1.

•D. PageCount argument outputs the number of extracted pages. This statement is false because the activity does not have a PageCount argument1. The activity does not output the number of extracted pages, but only the new PDF file that contains the extracted pages1.

The date is in the format "d MMM yyyy" (e.g., "3 Mar 2023").

The correct expression is: (DateTime.Now - DateTime.ParseExact(DateString, "d MMM yyyy", CultureInfo.InvariantCulture)).Days < 7.

This expression calculates the difference in days between the current date (DateTime.Now) and the parsed date (DateTime.ParseExact(DateString, "d MMM yyyy", CultureInfo.InvariantCulture)).

It then checks if this difference is less than 7 days, which means the date is within the last 7 days.