*Ques 01. What is the difference between ByVal and ByRef and which is default ?
Ans-
ByRef: If you pass an argument by reference when calling a procedure the procedure access to the actual variable in memory. As a result the variable's value can be changed by the procedure.
ByVal: If you pass an argument by value when calling a procedure the variable's value can be changed with in the procedure only outside the actual value of the variable is retained.
ByRef is default: Passing by reference is the default in VBA. If you do not explicitly specify to pass an argument by value VBA will pass it by reference.
*Ques 02. What is the meaning of Option Explicit and Option Base?
Ans-
Explicit makes the declaration of Variables Mandatory while Option Base used at module level to declare the default lower bound for array subscripts. For eg. Option Base 1 will make the array lower bound as 1 instead of 0.
Ques 03. What are various data type and their size?
Ans-
i) The Boolean data type has only two states, True and False.
ii) The Byte data type is an 8-bit variable which can store value from 0 to 255.
iii) The Double data type is a 64-bit floating point number used when high accuracy is needed.
iv) The Integer data type is a 16-bit number which can range from -32768 to 32767.
v) The Long data type is a 32-bit number which can range from -2,147,483,648 to 2,147,483,647.
vi) The Single data type is a 32-bit number ranging from -3.402823e38 to -1.401298e-45
vii) The String data type is usually used as a variable-length type of variable.
*Ques 04. Difference between ActiveWorkbook and ThisWorkbook.
Ans-
ThisWorkbook refers to the workbook where code is being written while ActiveWorkbook refers to the workbook which is in active state with active window. In case of only one workbook open, ActiveWorkbook is same as ThisWorkbook.
Ques. Show me the variable diagram
Ans-
Ques 05. Code to find a Last used Row in a column or Last used column of a Row.
Ans:
Last Row in a column can be find using End(xlUp) and Last Column in a row can be find using End(xlToLeft). For e.g. Range("A1048576").End(xlUp).Row gives last used row of Column A.
Ques 06. Difference between ActiveX and Form Controls.
Ans:
i) Forms controls can be used on worksheets and chart sheets. Forms controls can also be placed within embedded charts in Classic Excel (though not in Excel 2007). ActiveX controls can only be used on worksheets. ActiveX controls do not work in MacExcel.
ii) The Forms controls aren’t very complicated, and they have been part of Excel for longer (they were used in Excel 5/95’s dialog sheets) than the Controls Toolbox (Excel 97), so it stands to reason that they’d be more seamlessly integrated. Being newer, the ActiveX controls have richer formatting possibilities. Both can link to cells and ranges in the worksheet.
*Ques 07. What is the difference b/w Functions and Subroutines?
Ans:
i) Subroutines never return a value but functions does return values.
ii) A function could not change the values of actual arguments whereas a subroutine could change them.
*Ques 08. How to debug a VBA code?
Ans:
Using Breakpoints(F9), Step-by-step execution (F8), Debug.Print & Immediate Window and Watch window.
*Ques 09. Draw basic Excel Object Model.
Ans:
Application --> Workbooks --> Worksheets --> Range / Chart
Ques 10. What are properties, methods, events and objects?
Ans:
All the controls in the ToolBox except the Pointer are objects in Visual Basic. These objects have associated properties, methods and events.
A property is a named attribute of a programming object. Properties define the characteristics of an object such as Size, Color etc. or sometimes the way in which it behaves.
A method is an action that can be performed on objects. For example, a cat is an object. Its properties might include long white hair, blue eyes, 3 pounds weight etc. A complete definition of cat must only encompass on its looks, but should also include a complete itemization of its activities. Therefore, a cat's methods might be move, jump, play, breath etc.
Visual Basic programs are built around events. Events are various things that can happen in a program. Let us consider a TextBox control and a few of its associated events to understand the concept of event driven programming. The TextBox control supports various events such as Change, Click, MouseMove and many more that will be listed in the Properties dropdown list in the code window for the TextBox control. We will look into a few of them as given below.
* The code entered in the Change event fires when there is a change in the contents of the TextBox
* The Click event fires when the TextBox control is clicked.
* The MouseMove event fires when the mouse is moved over the TextBox
Ques 11. How to hide a worksheet so that a user cannot unhide it?
Ans:
Use Sheet's visible property and set it to xlSheetVeryHidden . For eg. Sheets(1).Visible = xlSheetVeryHidden will super hide the first worksheet of the workbook.
Ques 12. Union is used for _____________ ?
Ans:
To unite the different ranges depending on the logic. It is similar to set union, here range works as set. For eg. Set nrange = Union(rng1,rng2)
Ques 13. Which are the 2 macro languages and which do you use ?
Asn:
XLM (used in Excel 97 or before) and VBA(used for 2000 and after). Obviously, VBA is in use these days.
Ques 14. How can you increase the number of rows in a worksheet?
Ans:
No one can't. They're fixed as 65536(2^16) in Excel 2003 or before and 1048576(2^20) in Excel 2007 & Excel 2010.
Ques 15. How can you increase the number of columns in a worksheet?
Ans:
No one can't. They're fixed as 256(2^8) in Excel 2003 or before and 16384(2^14) in Excel 2007 & Excel 2010.
Ques. 16. How will you distribute a workbook such that it can't be copied using macro or anything?
Ans:
We can create a workbook which cannot be modified but can not create a workbook which can't be copied.(It depends on system security, it has nothing to do with Excel or VBA)
Ques 17. How can you prevent a user for adding or deleting sheets?
Ans:
You need to protect the workbook's structure.
Excel 2003 -->
Select Tools - Protection - Protect Workbook. In the Protect Workbook dialog box, make sure that the Structure checkbox is checked.
Excel 2007/2010 -->
Go to Review --> Click 'Protect Workbook' --> Click 'Protect Structure and Windows'
If you specify a password, that password will be required to unprotect the workbook. When a workbook's structure is protected, the user may not:
* Add/Delete a sheet
* Hide/Unhide a sheet
* Rename a sheet
* Move a sheet
*Ques 18. What types of workbook protection are available?
Ans:
Excel provides three ways to protect a workbook:
* Require a password to open the workbook
* Prevent users from adding sheets, deleting sheets, hiding sheets, and unhiding sheets
* Prevent users from changing the size or position of windows
*Ques 19. The Font dialog box allows you to select different Fonts, their style, their size, and some other special effects. How do you bring up this Font dialog box?
Ans:
Use Application.Dialogs(xlDialogFont).Show or Application.Dialogs(xlDialogFormatFont).Show to load font dialog box from Excel VBA.
*Ques 20. What is ADO, OLEDB & ODBC?
Ans:
ADO : ActiveX Data Objects is universal data access framework that encompasses the functionality of DAO.
ODBC : Open Database Connectivity(ODBC) is a windows technology that lets a database client application connect to a external database.
OLEDB : Low level programming interface designed to access a wide variety of data access Object Linking and Embedding (OLE).
*Ques 21. What is the method for returning more than one values from a function in VB?
Ans:
Any of the three methods can be used:
i) Create a class with the properties you require to return and then return the object of the class from the function.
ii) Using ByRef for the values.
iii) Return an array of the values.
Ques 22. Does VBA supports OOP principles?
Ans:
Yes because VBA is VB6.0 based which is an Object Based Programming Language and is also known as 'Event Driven Programming' and it supports Polymorphism, Encapsulation and partially Inheritance.
Ques 23. To set the command button for ESC, Which property needs to be changed?
Ans:
Set Cancel property of Button to True on the Form.
*Ques 24. What is a Variant, what the pros and cons of its use?
Ans:
Variant data type is able to hold any other data type, including numbers, strings, dates, and object references. A Variant's descriptor is only 16 bytes long (4 short words for the type, and 2 long words for the data, or data pointer).
Pros: You cannot use Null with any variable type other than Variant.
You don't need to worry about what you have declared a variable as.
When a Variant has been declared but not assigned a value, it contains the special value Empty.
Cons: A developer may not remember and misuse a variable assigning any value to it which will be type-casted without errors.
Ques 25. What is a volatile function?
Ans:
Volatile functions are a type of function that will always recalculate. That means whenever Excel needs to calculate any part of the worksheet, those cells containing volatile functions will also calculate.
Ques 26. Give some examples of Volatile function.
Ans
Some of Excel’s functions are obviously volatile: RAND(), NOW(), TODAY()
Others are less obviously volatile: OFFSET(), CELL(), INDIRECT(), INFO()
Some are volatile in some versions of Excel but not in others: INDEX()became non-volatile in Excel 97.
A number of functions that are documented by Microsoft as volatile do not actually seem to be volatile when tested:
INDEX(), ROWS(), COLUMNS(), AREAS()
and CELL("Filename") IS volatile although a MSKBN article says its not.
One particular syntax of SUMIF is volatile in Excel 2002 and subsequent versions:
=SUMIF(A1:A4,">0",B1) is volatile whereas =SUMIF(A1:A4,">0",B1:B4) is not volatile.
Ques 27. How do you make a UDF volatile?
Ans:
By adding Application.Volatile statement to it. It must be the first line of your User Defined Function.
Ques 28. Is it possible to apply 'Application.Volatile(False)' to a volatile public function like INDEX and make it not volatile?
Ans:
Actually INDEX is not a volatile function, even though some MicroSoft documentation says it is. Anyway no its not possible to apply Application.Volatile(False) to a built-in Excel function except by duplicating what the built-in function does inside a UDF.
Ques 29. What is Excel dependency tree?
Ans:
Dependency trees are excel way of minimizing the calculation by tracking what has changed since last calculation. It allows Excel to recalculate only:
* Formulae/Names that have changed.
* Formulae containing Volatile Functions
* Formulae dependent on changed or volatile formulae or cells or names.
Excel determines dependencies by looking at the cells referred to by each formula and by the argument list of each function.
Dependency trees are immediately updated whenever a formula is entered or changed.
To force the dependency trees to be rebuilt and all formulae calculation use CTRL+ALT+SHIFT+F9.
Ques 30. What are keyboard shortcuts and their equivalent VBA methods for Formulae calculation and building Excel dependency trees?
Ans
Shortcut Combination VBA Equivalent Meaning
F9 Application.Calculate Recalculate
Ctrl+Alt+F9 Application.CalculateFull Full Calculation
Ctrl+Alt+Shift+F9 Application.CalculateFullRebuild Rebuild Excel Dependency Tree
and Full Calculation
Shift+F9 Sheets(1).Calculate Calculate Worksheet
Ques 31. What does Range.Dirty used for ?
Ans:
To add the specified cells to the list of cells requiring calculation at the next recalculation.
Ques 32. How do you check the Calculation state ?
Ans:
Pretty simply, using the Application.CalculationState property which tells if calculation has completed ( xlDone ), is pending ( xlPending) , or is in process ( xlCalculating ).
Ques 33. How do you define Excel Calculation Interruption Key to stop the calculation?
Ans:
Using Application.CalculationInterruptKey= XlAnyKey | XLEscKey | XlNokey.
Remember using XlNokey, calculation cannot be interrupted.
Ques 34. What do you know about the interpretation features of VBA?
Ans:
VBA is licensed to Microsoft and this compatible with and only Microsoft products. Code written is compiled by an intermediate language called P-code and this is stored in hosting applications such as Excel, Word and Access. The intermediate code is interpreted by a virtual machine. This code and intermediate language is the exclusive right of Microsoft.
Ques 35. Explain about insert module and Goal Seek functions present in VBA?
Ans:
The chief use of VBA is to make use of its special function which helps in repeated actions. Goal seek function helps to reduce manual entry of the code each and every time. This solves the problem of repeated function entry by automating functions and actions. Sub routines are inserted into the using the VBA editor and command insert module.
*Ques 36. State the difference between Visual Basic, VB Script and Visual Basic for Applications?
Ans:
Visual basic is useful if you are planning to develop your programs from scratch.This language helps you in developing Active x controls, exe files, etc.
VB script is a powerful tool, through which you can create small scale applications on web pages, automation applications, etc. Integrated development environment is not present for VB script.
Visual Basic for Applications are very useful in automating your existing application. VB application is useful for developing already existing applications.
*Ques 37. What is the difference between UsedRange and CurrentRegion properties ?
Ans:
i) The current region is a range bounded by any combination of blank rows and blank columns.
This property is useful for many operations that automatically expand the selection to include the entire current region, such as the AutoFormat method. This property cannot be used on a protected worksheet.
The UsedRange property is used to select the range of used cells on a worksheet. It returns a Range object that represents the used range on the specified worksheet.
ii) Every non-blank cell got its CurrentRegion and its keyboard shortcut is Ctrl+Shift+Spacebar.
iii) There can be many current regions but there is only one used range in a worksheet.
*Ques 38. Tips and suggestion
First interviewer sees your general attitude towards programming and will try to calm down your blood pressure. While it seems very easy this is the biggest hurdle. He may give you a very easy program to write like sorting an array, coloring the sheet tabs, etc. The objective is not to see your technical knowledge but your programming behavior. Such programs are so obvious and easy that expectations are not about writing the program but to see comments, indentation, using meaningful variable names, declaring variables(which one don't needs to but considered a great practice), using Option Explicit, Debugging style etc. To know that good you're able to communicate your logic with other developers. This is very helpful for the team and is considered a good practice with fruits returned in long term.
Secondly, he will try to test your knowledge of Excel Object Model. They may ask you to sort and filter a range, or clean out duplicate data from a list, consolidate data from multiple files, import data from MS access databases etc . He will look for knowledge of and ability to work with fundamental Excel objects such as Workbook, Worksheet, Range etc; also he will definitely want to see that you neither use "Macro Recorder" nor macro recorder style code using Select and Activate everywhere.
Thirdly he would be interested in your excel knowledge as well as how VBA works. Like pivots, charts, UDF, volatile functions(Can you write code that runs every time the worksheet changes?”) etc.
Ans-
ByRef: If you pass an argument by reference when calling a procedure the procedure access to the actual variable in memory. As a result the variable's value can be changed by the procedure.
ByVal: If you pass an argument by value when calling a procedure the variable's value can be changed with in the procedure only outside the actual value of the variable is retained.
ByRef is default: Passing by reference is the default in VBA. If you do not explicitly specify to pass an argument by value VBA will pass it by reference.
*Ques 02. What is the meaning of Option Explicit and Option Base?
Ans-
Explicit makes the declaration of Variables Mandatory while Option Base used at module level to declare the default lower bound for array subscripts. For eg. Option Base 1 will make the array lower bound as 1 instead of 0.
Ques 03. What are various data type and their size?
Ans-
i) The Boolean data type has only two states, True and False.
ii) The Byte data type is an 8-bit variable which can store value from 0 to 255.
iii) The Double data type is a 64-bit floating point number used when high accuracy is needed.
iv) The Integer data type is a 16-bit number which can range from -32768 to 32767.
v) The Long data type is a 32-bit number which can range from -2,147,483,648 to 2,147,483,647.
vi) The Single data type is a 32-bit number ranging from -3.402823e38 to -1.401298e-45
vii) The String data type is usually used as a variable-length type of variable.
*Ques 04. Difference between ActiveWorkbook and ThisWorkbook.
Ans-
ThisWorkbook refers to the workbook where code is being written while ActiveWorkbook refers to the workbook which is in active state with active window. In case of only one workbook open, ActiveWorkbook is same as ThisWorkbook.
Ques. Show me the variable diagram
Ans-
Ques 05. Code to find a Last used Row in a column or Last used column of a Row.
Ans:
Last Row in a column can be find using End(xlUp) and Last Column in a row can be find using End(xlToLeft). For e.g. Range("A1048576").End(xlUp).Row gives last used row of Column A.
Ques 06. Difference between ActiveX and Form Controls.
Ans:
i) Forms controls can be used on worksheets and chart sheets. Forms controls can also be placed within embedded charts in Classic Excel (though not in Excel 2007). ActiveX controls can only be used on worksheets. ActiveX controls do not work in MacExcel.
ii) The Forms controls aren’t very complicated, and they have been part of Excel for longer (they were used in Excel 5/95’s dialog sheets) than the Controls Toolbox (Excel 97), so it stands to reason that they’d be more seamlessly integrated. Being newer, the ActiveX controls have richer formatting possibilities. Both can link to cells and ranges in the worksheet.
*Ques 07. What is the difference b/w Functions and Subroutines?
Ans:
i) Subroutines never return a value but functions does return values.
ii) A function could not change the values of actual arguments whereas a subroutine could change them.
*Ques 08. How to debug a VBA code?
Ans:
Using Breakpoints(F9), Step-by-step execution (F8), Debug.Print & Immediate Window and Watch window.
*Ques 09. Draw basic Excel Object Model.
Ans:
Application --> Workbooks --> Worksheets --> Range / Chart
Ques 10. What are properties, methods, events and objects?
Ans:
All the controls in the ToolBox except the Pointer are objects in Visual Basic. These objects have associated properties, methods and events.
A property is a named attribute of a programming object. Properties define the characteristics of an object such as Size, Color etc. or sometimes the way in which it behaves.
A method is an action that can be performed on objects. For example, a cat is an object. Its properties might include long white hair, blue eyes, 3 pounds weight etc. A complete definition of cat must only encompass on its looks, but should also include a complete itemization of its activities. Therefore, a cat's methods might be move, jump, play, breath etc.
Visual Basic programs are built around events. Events are various things that can happen in a program. Let us consider a TextBox control and a few of its associated events to understand the concept of event driven programming. The TextBox control supports various events such as Change, Click, MouseMove and many more that will be listed in the Properties dropdown list in the code window for the TextBox control. We will look into a few of them as given below.
* The code entered in the Change event fires when there is a change in the contents of the TextBox
* The Click event fires when the TextBox control is clicked.
* The MouseMove event fires when the mouse is moved over the TextBox
Ques 11. How to hide a worksheet so that a user cannot unhide it?
Ans:
Use Sheet's visible property and set it to xlSheetVeryHidden . For eg. Sheets(1).Visible = xlSheetVeryHidden will super hide the first worksheet of the workbook.
Ques 12. Union is used for _____________ ?
Ans:
To unite the different ranges depending on the logic. It is similar to set union, here range works as set. For eg. Set nrange = Union(rng1,rng2)
Ques 13. Which are the 2 macro languages and which do you use ?
Asn:
XLM (used in Excel 97 or before) and VBA(used for 2000 and after). Obviously, VBA is in use these days.
Ques 14. How can you increase the number of rows in a worksheet?
Ans:
No one can't. They're fixed as 65536(2^16) in Excel 2003 or before and 1048576(2^20) in Excel 2007 & Excel 2010.
Ques 15. How can you increase the number of columns in a worksheet?
Ans:
No one can't. They're fixed as 256(2^8) in Excel 2003 or before and 16384(2^14) in Excel 2007 & Excel 2010.
Ques. 16. How will you distribute a workbook such that it can't be copied using macro or anything?
Ans:
We can create a workbook which cannot be modified but can not create a workbook which can't be copied.(It depends on system security, it has nothing to do with Excel or VBA)
Ques 17. How can you prevent a user for adding or deleting sheets?
Ans:
You need to protect the workbook's structure.
Excel 2003 -->
Select Tools - Protection - Protect Workbook. In the Protect Workbook dialog box, make sure that the Structure checkbox is checked.
Excel 2007/2010 -->
Go to Review --> Click 'Protect Workbook' --> Click 'Protect Structure and Windows'
If you specify a password, that password will be required to unprotect the workbook. When a workbook's structure is protected, the user may not:
* Add/Delete a sheet
* Hide/Unhide a sheet
* Rename a sheet
* Move a sheet
*Ques 18. What types of workbook protection are available?
Ans:
Excel provides three ways to protect a workbook:
* Require a password to open the workbook
* Prevent users from adding sheets, deleting sheets, hiding sheets, and unhiding sheets
* Prevent users from changing the size or position of windows
*Ques 19. The Font dialog box allows you to select different Fonts, their style, their size, and some other special effects. How do you bring up this Font dialog box?
Ans:
Use Application.Dialogs(xlDialogFont).Show or Application.Dialogs(xlDialogFormatFont).Show to load font dialog box from Excel VBA.
*Ques 20. What is ADO, OLEDB & ODBC?
Ans:
ADO : ActiveX Data Objects is universal data access framework that encompasses the functionality of DAO.
ODBC : Open Database Connectivity(ODBC) is a windows technology that lets a database client application connect to a external database.
OLEDB : Low level programming interface designed to access a wide variety of data access Object Linking and Embedding (OLE).
*Ques 21. What is the method for returning more than one values from a function in VB?
Ans:
Any of the three methods can be used:
i) Create a class with the properties you require to return and then return the object of the class from the function.
ii) Using ByRef for the values.
iii) Return an array of the values.
Ques 22. Does VBA supports OOP principles?
Ans:
Yes because VBA is VB6.0 based which is an Object Based Programming Language and is also known as 'Event Driven Programming' and it supports Polymorphism, Encapsulation and partially Inheritance.
Ques 23. To set the command button for ESC, Which property needs to be changed?
Ans:
Set Cancel property of Button to True on the Form.
*Ques 24. What is a Variant, what the pros and cons of its use?
Ans:
Variant data type is able to hold any other data type, including numbers, strings, dates, and object references. A Variant's descriptor is only 16 bytes long (4 short words for the type, and 2 long words for the data, or data pointer).
Pros: You cannot use Null with any variable type other than Variant.
You don't need to worry about what you have declared a variable as.
When a Variant has been declared but not assigned a value, it contains the special value Empty.
Cons: A developer may not remember and misuse a variable assigning any value to it which will be type-casted without errors.
Ques 25. What is a volatile function?
Ans:
Volatile functions are a type of function that will always recalculate. That means whenever Excel needs to calculate any part of the worksheet, those cells containing volatile functions will also calculate.
Ques 26. Give some examples of Volatile function.
Ans
Some of Excel’s functions are obviously volatile: RAND(), NOW(), TODAY()
Others are less obviously volatile: OFFSET(), CELL(), INDIRECT(), INFO()
Some are volatile in some versions of Excel but not in others: INDEX()became non-volatile in Excel 97.
A number of functions that are documented by Microsoft as volatile do not actually seem to be volatile when tested:
INDEX(), ROWS(), COLUMNS(), AREAS()
and CELL("Filename") IS volatile although a MSKBN article says its not.
One particular syntax of SUMIF is volatile in Excel 2002 and subsequent versions:
=SUMIF(A1:A4,">0",B1) is volatile whereas =SUMIF(A1:A4,">0",B1:B4) is not volatile.
Ques 27. How do you make a UDF volatile?
Ans:
By adding Application.Volatile statement to it. It must be the first line of your User Defined Function.
Ques 28. Is it possible to apply 'Application.Volatile(False)' to a volatile public function like INDEX and make it not volatile?
Ans:
Actually INDEX is not a volatile function, even though some MicroSoft documentation says it is. Anyway no its not possible to apply Application.Volatile(False) to a built-in Excel function except by duplicating what the built-in function does inside a UDF.
Ques 29. What is Excel dependency tree?
Ans:
Dependency trees are excel way of minimizing the calculation by tracking what has changed since last calculation. It allows Excel to recalculate only:
* Formulae/Names that have changed.
* Formulae containing Volatile Functions
* Formulae dependent on changed or volatile formulae or cells or names.
Excel determines dependencies by looking at the cells referred to by each formula and by the argument list of each function.
Dependency trees are immediately updated whenever a formula is entered or changed.
To force the dependency trees to be rebuilt and all formulae calculation use CTRL+ALT+SHIFT+F9.
Ques 30. What are keyboard shortcuts and their equivalent VBA methods for Formulae calculation and building Excel dependency trees?
Ans
Shortcut Combination VBA Equivalent Meaning
F9 Application.Calculate Recalculate
Ctrl+Alt+F9 Application.CalculateFull Full Calculation
Ctrl+Alt+Shift+F9 Application.CalculateFullRebuild Rebuild Excel Dependency Tree
and Full Calculation
Shift+F9 Sheets(1).Calculate Calculate Worksheet
Ques 31. What does Range.Dirty used for ?
Ans:
To add the specified cells to the list of cells requiring calculation at the next recalculation.
Ques 32. How do you check the Calculation state ?
Ans:
Pretty simply, using the Application.CalculationState property which tells if calculation has completed ( xlDone ), is pending ( xlPending) , or is in process ( xlCalculating ).
Ques 33. How do you define Excel Calculation Interruption Key to stop the calculation?
Ans:
Using Application.CalculationInterruptKey= XlAnyKey | XLEscKey | XlNokey.
Remember using XlNokey, calculation cannot be interrupted.
Ques 34. What do you know about the interpretation features of VBA?
Ans:
VBA is licensed to Microsoft and this compatible with and only Microsoft products. Code written is compiled by an intermediate language called P-code and this is stored in hosting applications such as Excel, Word and Access. The intermediate code is interpreted by a virtual machine. This code and intermediate language is the exclusive right of Microsoft.
Ques 35. Explain about insert module and Goal Seek functions present in VBA?
Ans:
The chief use of VBA is to make use of its special function which helps in repeated actions. Goal seek function helps to reduce manual entry of the code each and every time. This solves the problem of repeated function entry by automating functions and actions. Sub routines are inserted into the using the VBA editor and command insert module.
*Ques 36. State the difference between Visual Basic, VB Script and Visual Basic for Applications?
Ans:
Visual basic is useful if you are planning to develop your programs from scratch.This language helps you in developing Active x controls, exe files, etc.
VB script is a powerful tool, through which you can create small scale applications on web pages, automation applications, etc. Integrated development environment is not present for VB script.
Visual Basic for Applications are very useful in automating your existing application. VB application is useful for developing already existing applications.
*Ques 37. What is the difference between UsedRange and CurrentRegion properties ?
Ans:
i) The current region is a range bounded by any combination of blank rows and blank columns.
This property is useful for many operations that automatically expand the selection to include the entire current region, such as the AutoFormat method. This property cannot be used on a protected worksheet.
The UsedRange property is used to select the range of used cells on a worksheet. It returns a Range object that represents the used range on the specified worksheet.
ii) Every non-blank cell got its CurrentRegion and its keyboard shortcut is Ctrl+Shift+Spacebar.
iii) There can be many current regions but there is only one used range in a worksheet.
*Ques 38. Tips and suggestion
First interviewer sees your general attitude towards programming and will try to calm down your blood pressure. While it seems very easy this is the biggest hurdle. He may give you a very easy program to write like sorting an array, coloring the sheet tabs, etc. The objective is not to see your technical knowledge but your programming behavior. Such programs are so obvious and easy that expectations are not about writing the program but to see comments, indentation, using meaningful variable names, declaring variables(which one don't needs to but considered a great practice), using Option Explicit, Debugging style etc. To know that good you're able to communicate your logic with other developers. This is very helpful for the team and is considered a good practice with fruits returned in long term.
Secondly, he will try to test your knowledge of Excel Object Model. They may ask you to sort and filter a range, or clean out duplicate data from a list, consolidate data from multiple files, import data from MS access databases etc . He will look for knowledge of and ability to work with fundamental Excel objects such as Workbook, Worksheet, Range etc; also he will definitely want to see that you neither use "Macro Recorder" nor macro recorder style code using Select and Activate everywhere.
Thirdly he would be interested in your excel knowledge as well as how VBA works. Like pivots, charts, UDF, volatile functions(Can you write code that runs every time the worksheet changes?”) etc.
No comments:
Post a Comment