Question Bank VB .net

Values stored in constants _______ during the execution of an application.

2. Constant names may or may not be a valid symbolic name [0.5]

10 If you have no code to run when the condition is False in an

If Then Else statement then you omit the Else statement [0.5]

11 In a While Loop the statements are repeated as long as the condition

12 In a Do Loop statement using Until keyword looping continues until

a) True c) False

13 When an array declared is of type Object, it can have data of any data

14 No two arrays declared are of the same data type unless they have the

15 There is/are possible source/sources for constants [0.5]

a) at the top of the code

window with all the objects

and events.

c) at the top of the code window

with only the events

b) at the bottom of the code

window with all the objects and

events

d) at the top of the code window

with only the objects

a) declare 't' as an integer but will

not assign it with any value 's'

will be assigned the final value

as 10

c) declare 't' as an integer and will assign it the string 10 's' will be assigned the final value as 10 + 10

b) declare 't' as an integer and

will assign it the value 10

's' will be assigned the final

value as 20.

d) result in an error, as 't' has not been assigned to an integer but a string

18 In a decimal data type bits are used for storing the integer part

of the decimal number and _ bits are used for storing the decimal part

a) use in manipulating single

character values

c) creating arrays of character values.

b) use in manipulating multiple

character values d) None of the above

21 Any attempt to change the value of the String: [1.0]

a) results in the updating of the

original string

c) results in a new String being created to store the changed value, while the original string is destroyed.

b) results in a new String being

created to store the changed

value, while the original string

is placed separately

d) None of the above

22 Conditional statements allow conditional execution of statements

based on expressions evaluated at run time

[1.0]

23 In an If Then Else statement, the comparision can be any

expression that evaluates to:

[1.0]

b) Only false

24 Identify the correct statements with respect to if… then else [1.0]

a) Each expression must be

implicitly convertible to

Boolean.

c) Each expression must be

explicitly convertible to Boolean

b) Once a block finishes

executing, execution passes

to the end of the

If Then Else statement.

d) Once a block finishes

executing, execution passes

to the start of the If Then Else statement

25 To execute more than one line of code when a condition is True, you

use which all of the following multi-line syntax [1.0]

a) If Then and End If d) If Then

b) If Then Else and End If e) While Do

b) If Then Else statements d) While statement

27 The size of an array which is created [1.0]

a) Cannot be changed after it is

created

c) can be changed after it has

been created using the Create statement

b) Can be changed after it has

been created using the

Redim statement

28 When OptionStrict statement is on, a variable of one type can be

29 To exit from a While loop when the loop is endless we use the

31 To exit from a For Each Next loop before it has traversed the

a) Exit d) End For Each

Object data types

d) the above statement will

result in an error

33 Identify the correct statements with respect to VB net [1.5]

a) It supports late-binding d) All arrays are zero-based.

b) It is case-sensitive e) It supports operator

overloading

c) It can flag syntactical errors

immediately

34 Dim Trial As Integer = 0

Dim no1 As Integer = 90

Dim number As Integer = 20

Do

number = number - 1

Counter = Counter + 1

TextBox1.Text = TextBox1.Text & number

TextBox2.Text = TextBox2.Text & Counter

Loop While number > 20

Identify the number of times the loop is executed

b) 1

36 Identify the correct statements with respect to arrays [1.5]

a) The dimensionality or rank

of the array corresponds to

the number of subscripts

used to indentify individual

elements.

c) You can change the size of

an array after you have created it.

b) Arrays have a fixed size in

you can only change the last

dimension when you use the

ReDim statement

d) In a multidimensional array,

you can only change the first dimension when you use the keyword Preserve

b) In a multidimensional array, e) In a multidimensional array,

you can only change the

last dimension when you

use the keyword Preserve.

you can only change the first dimension when you use the ReDim statement

c) While using Redim to

preserve the existing values

of an array we use the

41 A class can gain the properties and behaviour of an existing class and

this is done by a process known as

a) OptionExplicit c) OptionCompare

b) OptionStrict

44 Identify the correct statements with respect to constants [1.5]

a) It is a meaningful name that

takes the place of a number or

string that may or may not

change

d) More than one constant can be declared on a single line if you separate them with commas.

b) It is a meaningful name that

takes the place of a number

or string that does not

change.

e) Constants can be defined

in terms of previously defined constants.

c) Like a variable it is possible to

assign a new value to a

constant

45 Assume three variables d1, d2, d3 These variables are declared as

shown in the statement below

"Dim d1, d2, d3 As Integer = 20" Identify the correct statement

[2.0]

a) Value of d1, d2 & d3 = 20 c) Value of d1 and d2 =20 and

value of d3=0

b) Value of d1 and d2 =0, value

of d3 =20 d) Explicit initialization is not permitted with multiple

declarators

46 "Public Const d1 = 20" can be placed in: [Identify the correct options] [2.0]

b) Public class form event d) None of the above

47 The 'start' button is clicked to debug the code and execute it, if

errors are encountered then these errors are displayed in the

description box Identify the correct statement

[2.0]

a) The debugging of the entire

code again takes place after

the programmer again clicks

on the 'start' button

c) Every time a change is made after the first time the 'start' button is clicked

The code is checked for all errors and the description box is updated.

b) Every time a change is made

after the first time the 'start'

button is clicked The code is

checked for all errors but the

description box is updated only

after the 'start' button is clicked

statement would be displayed as "Select Case t1" at line 2.

b) the above code will not

execute, as a Case statement

should begin with "Select Case

t1" at line 2

d) None of the above

49 Dim maxnumber As Integer

maxnumber = 40

Select Case maxnumber

[2.0]

compilation error as multiple expressions or ranges in the caluse shown in line 4 cannot be used.

50 Identify the correct statements with respect to For Each Next loop [2.0]

a) The 'For Each Next' loop is

entered if there is at least

one element in a group.

c) Only one 'Exit For' can be

used in this loop

b) Any number of 'Exit For'

statements may be placed

anywhere in the loop as an

alternative way to exit.

d) Each loop must have a unique element variable.

51 Dim Counter As Integer = 2

53 When you want to use the value returned by a function, you can use a

function procedure on the side of an expression

56 When a variable is passed by value, the ByVal keyword is used

57 The called program can access the original data when a

pointer of the data is copied while passing the argument as reference [0.5]

59 The Dispose method is implemented by default for any component that

inherits from System.ComponentModel.Component and it is used to make the program free all system resources it may have allocated

[0.5]

60 While handling an event in the client program, the object declared

using the WithEvents keyword has to be declared: [0.5]

a) inside the procedure or

function at the module level

b) outside the procedure or function at the module level.

c) Protected

62 What happens after the Sub procedure returns to the calling program? [1.0]

a) Execution stops c) Execution continues with

the statement following the statement that called it.

b) Execution continues with the

previous statement, from the

statement that called it,

verifying if the action was

performed

d) None of the above

63 Which of the following statement is true, when an argument passed is

by value using the ByVal keyword

[1.0]

a) it is possible to modify the

members of the objects to

which it points, if the

d) it is possible to modify the variables itself, if the argument passed is a

argument is a reference

type.

variable argument.

b) it is possible to replace the

value of the object

e) it is possible to modify the

members of the objects to which it points, if the argument passed is a variable argument

c) it is the default value in case

64 Which of the following is true, when an argument passed is by

a) it is possible to modify the

members of the objects to

which it points, if the argument

is a reference type

c) it is the default value in case

of Visual Basic

b) it is possible to modify the

variable itself if a variable

argument is passed.

d) it is possible to modify the

variables itself, if the argument passed is a reference type

65 Executing different methods at runtime using a common method name

66 When two "System.Console.WriteLine" statements are used, they will

a) the same line by appending

the first set of data with the

next set

c) the same line by overwriting

the first set of data with the next set

b) different lines as the

statement also indicates a

carriage return

67 When two "System.Console.Write" statements are used they will

display the selected data on

[1.0]

a) the same line by appending

the first set of data with the

next set.

c) the same line by overwriting

the first set of data with the next set

b) different lines, as the

statement also indicates a

carriage return

68 Sub trial (ByVal dt1 As String)

'Code that makes changes to dt1

End Sub

Can the above variable be forced by the calling code to pass by reference?

[1.0]

a) The above variable can be

forced by the calling code to

pass by reference

b) The above variable cannot

be forced by the calling code to pass by reference.

69 Sub trial (ByRef dt1As String)

'Code that makes changes to dt1

End Sub

Can the above variable be forced by the calling code to pass by value?

[1.0]

a) The above variable can be

forced by the calling code to

pass by value

b) The above variable cannot

be forced by the calling code

c) The constructor method is

always called by the same name as the class

b) It allows you to set the final d) The constructor method is

state of an object always called New

regardless of the name of the type

71 It is a must for the parameter list and the return type of the function to

match the parameter list and return type of the function that is declared

c) another procedure f) All of the above

73 Identify the correct statements with respect to procedures [1.5]

a) A procedure cannot have any

Exit Sub statements in it

d) A procedure cannot have

more than three Exit Sub statements in it

b) A procedure cannot have more

than one Exit Sub statement in

it

e) A procedure can have any number of Exit Sub statements anywhere in it.

c) A procedure cannot have more

than two Exit Sub statements

in it

74 Identify the correct statements with respect to procedures [1.5]

a) A procedure cannot have any

Return statements in it

c) A procedure cannot have

more than three Return statements in it

b) A procedure cannot have more

than one Return statement in

b) always returns a value to the

calling procedure e) can be called using a Call statement.

c) cannot return a value to the

calling procedure

f)

76 Identify the correct statements with respect to Functions [1.5]

a) Function procedures are

Private by default

d) It is possible to return a value from a function including it in a Return statement.

b) Any number of Exit Function

statements can appear

anywhere in the procedure.

e) The function sets the default value to argtype if you use Exit Function without assigning a value

to the name of the function.

c) Only a single Exit Function

statement can appear

anywhere in the procedure

a) Passing a ByRef argument c) Passing a ByRef argument

proves advantageous as the

procedure can return a value

to the calling code using the

same argument.

proves advantageous as it protects a variable from being changed by the called procedure

b) Passing a ByVal argument

proves advantageous as the

procedure can return a value

to the calling code using the

a) 12,48 d) 1212

c) 12,12

80 1 Private WithEvents Obj1 as Class1

2 Private WithEvents Obj2 as Class1

3 Private Sub OnMyEvent (ByVal t1 as integer)

4 Handles Obj1.MyEvent, Obj2.MyEvent

a) While executing a Try block it

is a must to provide both the

Catch and Finally block

c) It is possible to have more than one Catch Blocks in a single Try Block.

b) While executing a Try block

it is a must to provide either

the Catch or Finally block.

d) Exit Try is used to jump out of the structure whenever required.

a) Sub [ (argumentlist) ] subname

'Statements of the Sub

procedure go here

End Sub

c) Sub subname[ (argumentlist)

] 'Statements of the Sub procedure go here

End

b) Sub [(argumentlist)] subname

'Statements of the Sub

procedure go here

End

d) Sub subname[ (argumentlist) ] 'Statements of the Sub procedure go here.

End Sub

83 Identify the correct rules applicable to overloading [2.0]

a) You must differentiate any

two versions of a procedure

by their argument lists.

d) You can overload a Function procedure with a Sub procedure, and vice versa, provided they have different argument lists.

b) You can use everything other

than the argument list to

differentiate versions For

example, you cannot have two

overloads that differ only in

their return types

e) You cannot overload a

method or a property on a class you are defining

c) Versions that are properly

differentiated by their

argument lists can have same

return types or same argument

modifiers

f) You cannot define a method and a property with the same name in the same class In other words, you cannot overload a method with a property, or vice versa.

84 1 Public Sub example1(ByVal x As Integer, ByVal y As Integer, ByVal

z As Integer)

2 Try

3 x /= (y * z)

4 Catch ex As Exception When y = 0

5 textbox1.text = "Its an error"