623 + Mcqs in C#.Net Page 12 McqOptions

551.	How is a string typically processed?
A.	On a character by character basis
B.	On a string by string basis
C.	Both On a character by character basis & On a string by string basis
D.	None of the mentioned
Answer» B. On a string by string basis

Discussion

552.	Which of these methods of class String is used to extract all the characters from a String object?
A.	CHARAT()
B.	Remove()
C.	charAt()
D.	Replace()
Answer» C. charAt()

Discussion

553.	Which of these methods of the class String is used to obtain length of String object?
A.	get()
B.	Sizeof()
C.	lengthof()
D.	length()
Answer» E.

Discussion

554.	Which of these methods of class are used to remove the leading and backward whitespaces?
A.	startsWith()
B.	trim()
C.	Trim()
D.	doTrim()
Answer» D. doTrim()

Discussion

555.	Which of these methods of class String is used to separate a substring from a String object?
A.	substring()
B.	Substring()
C.	SubString()
D.	None of the mentioned
Answer» C. SubString()

Discussion

556.	Which of these data type values is returned by equals() method of String class?
A.	char
B.	int
C.	boolean
D.	all of the mentioned
Answer» D. all of the mentioned

Discussion

557.	Which of these methods returns the string such that some characters which are specified to be removed from the end of strings are removed from string by mentioning the number of characters to be removed?
A.	Trim()
B.	Remove()
C.	TrimEnd()
D.	Split()
Answer» B. Remove()

Discussion

558.	Which of these methods of class String is used to check whether a substring exists at the beginning of the particular string?
A.	StartsWith()
B.	EndsWith()
C.	Starts()
D.	ends()
Answer» B. EndsWith()

Discussion

559.	Which of these methods is used to compare two strings such that after comparison output returns different integer values as ( 0 for false, 1 for true)?
A.	Equals ()
B.	Equals ()
C.	Compare()
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

560.	Which of these methods of class String is used to compare two String objects for their equality?
A.	equals()
B.	Equals()
C.	isequal()
D.	Isequal()
Answer» B. Equals()

Discussion

561.	Correct way to convert a string to uppercase using string class method()?
A.	Upper()
B.	ToUpper()
C.	Object.ToUpper()
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

562.	To perform comparison operation on strings supported operations are :
A.	Compare()
B.	Equals()
C.	Assignment ‘==’ operator
D.	All of the mentioned
Answer» E.

Discussion

563.	What does the term ‘immutable’ means in term of string objects?
A.	We can modify characters included in the string
B.	We cannot modify characters contained in the string
C.	We cannot perform various operation of comparison,inserting,appending etc
D.	None of the mentioned
Answer» C. We cannot perform various operation of comparison,inserting,appending etc

Discussion

564.	What is the String in C# meant for?
A.	Variable
B.	Character Array
C.	Object
D.	Class
Answer» D. Class

Discussion

565.	Which of the following statement is correct about a string in C#.NET?
A.	The System.Array class is used to represent a string
B.	A string has a zero-based index
C.	A number cannot be represented in the form of a string
D.	A string is mutable because it can be modified once it has been created
Answer» C. A number cannot be represented in the form of a string

Discussion

566.	Select wrong statement about destructor in C#?
A.	A class can have one destructor only
B.	Destructors cannot be inherited or overloaded
C.	Destructors can have modifiers or parameters
D.	All of the mentioned
Answer» D. All of the mentioned

Discussion

567.	Operator used to free the memory when memory is allocated ?
A.	new
B.	free
C.	delete
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

568.	Which of the following statements are correct?
A.	There is one garbage collector per program running in memory
B.	There is one common garbage collector for all programs
C.	To garbage collect an object set all references to it as null
D.	Both There is one common garbage collector for all programs & To garbage collect an object set all references to it as null
Answer» E.

Discussion

569.	Name a method which has the same name as that of class and which is used to destroy objects also called automatically when application is finally on process of being getting terminated.
A.	Constructor
B.	Finalize()
C.	Destructor
D.	End
Answer» D. End

Discussion

570.	The method called by clients of a class to explicitly release any resources like network,connection,open files etc.When the object is no longer required?
A.	Finalize()
B.	End()
C.	Dispose()
D.	Close()
Answer» D. Close()

Discussion

571.	Which operator among the following signifies the destructor operator?
A.	::
B.	:
C.	~
D.	&
Answer» D. &

Discussion

572.	Which method has the same name as that of its class?
A.	delete
B.	class
C.	constructor
D.	none of mentioned
Answer» D. none of mentioned

Discussion

573.	What is the return type of constructors?
A.	int
B.	float
C.	void
D.	none of the mentioned
Answer» E.

Discussion

574.	Which among the following is the correct statement: Constructors are used to
A.	initialize the objects
B.	construct the data members
C.	initialize the objects & construct the data members
D.	None of the mentioned
Answer» B. construct the data members

Discussion

575.	Correct statement about constructors in C#.NET is ?
A.	Constructors can be overloaded
B.	Constructors are never called explicitly
C.	Constructors have same name as name of the class
D.	All of the mentioned
Answer» E.

Discussion

576.	Number of constructors a class can define is ?
A.	1
B.	2
C.	Any number
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

577.	How many values does a function return?
A.	0
B.	2
C.	1
D.	any number of values
Answer» D. any number of values

Discussion

578.	Which of following statements are correct about functions?
A.	C# allows a function to have arguments with default values
B.	Redefining a method parameter in the method’s body causes an exception
C.	C# allows function to have arguments with default values
D.	Omitting the return type in method definition results into exception
Answer» B. Redefining a method parameter in the method’s body causes an exception

Discussion

579.	Select correct differences between ‘=’ and ‘==’ in C#.
A.	‘==’ operator is used to assign values from one variable to another variable ‘=’ operator is used to compare value between two variables
B.	‘=’ operator is used to assign values from one variable to another variable ‘==’ operator is used to compare value between two variables
C.	No difference between both operators
D.	None of the mentioned
Answer» C. No difference between both operators

Discussion

580.	Which reference modifier is used to define reference variable?
A.	&
B.	ref
C.	#
D.	$
Answer» C. #

Discussion

581.	The data members of a class by default are ?
A.	protected, public
B.	private, public
C.	private
D.	public
Answer» D. public

Discussion

582.	“A mechanism that binds together code and data in manipulates, and keeps both safe from outside interference and misuse.In short it isolates a particular code and data from all other codes and data. A well-defined interface controls the access to that particular code and data.”
A.	Abstraction
B.	Polymorphism
C.	Inheritance
D.	Encapsulation
Answer» E.

Discussion

583.	Which of following statements about objects in “C#” is correct?
A.	Everything you use in C# is an object, including Windows Forms and controls
B.	Objects have methods and events that allow them to perform actions
C.	All objects created from a class will occupy equal number of bytes in memory
D.	All of the mentioned
Answer» E.

Discussion

584.	What is the most specified using class declaration ?
A.	type
B.	scope
C.	type & scope
D.	None of mentioned
Answer» D. None of mentioned

Discussion

585.	The operator used to access member function of a class?
A.	:
B.	::
C.	.
D.	#
Answer» D. #

Discussion

586.	Which of the following is used to define the member of a class externally?
A.	:
B.	::
C.	#
D.	none of the mentioned
Answer» C. #

Discussion

587.	Which among the following is a conditional operator ?
A.	‘:?’
B.	?;
C.	?:
D.	??
Answer» D. ??

Discussion

588.	Which of the following options is not a Bitwise Operator in C#?
A.	&, \|
B.	^, ~
C.	<<, >>
D.	+=, -=
Answer» E.

Discussion

589.	Which of the following is/are not Relational operators in C#.NET ?
A.	>=
B.	<>=
C.	Not
D.	<=
Answer» C. Not

Discussion

590.	The correct way of incrementing the operators are :
A.	++ a ++
B.	b ++ 1
C.	c += 1
D.	d =+ 1
Answer» D. d =+ 1

Discussion

591.	Disadvantages of Explicit Conversion are?
A.	Makes program memory heavier
B.	Results in loss of data
C.	Potentially Unsafe
D.	None of the mentioned
Answer» C. Potentially Unsafe

Discussion

592.	Type of Conversion in which compiler is unable to convert the data type implicitly is?
A.	ushort to long
B.	int to uint
C.	ushort to long
D.	byte to decimal
Answer» C. ushort to long

Discussion

593.	The subset of ‘int’ data type is :
A.	long ,ulong, ushort
B.	long, ulong, uint
C.	long, float, double
D.	long, float, ushort
Answer» D. long, float, ushort

Discussion

594.	Implicit Conversion’ follows the order of conversion as per compatibility of data type as :
A.	float < char < int
B.	char < int < float
C.	int < char < float
D.	float < int < char
Answer» C. int < char < float

Discussion

595.	Types of ‘Data Conversion’ in C#?
A.	Implicit Conversion
B.	Explicit Conversion
C.	Implicit Conversion and Explicit Conversion
D.	None of the mentioned
Answer» C. Implicit Conversion and Explicit Conversion

Discussion

596.	What is the need for ‘Conversion of data type’ in C#?
A.	To store a value of one data type into a variable of another data type
B.	To get desired data
C.	To prevent situations of runtime error during change or conversion of data type
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

597.	Select differences between reference type and value type : 1. Memory allocated to ‘Value type’ is from heap and reference type is from ‘System. ValueType’ 2. Memory allocated to ‘Value type’ is from ‘System. ValueType’ and reference type is from ‘Heap’ 3. Structures, enumerated types derived from ‘System. ValueType’ are created on stack, hence known as ValueType and all ‘classes’ are reference type because values are stored on heap
A.	1, 3
B.	2, 3
C.	1, 2, 3
D.	1
Answer» C. 1, 2, 3

Discussion

598.	Choose effective differences between ‘Boxing’ and ‘Unboxing’.
A.	‘Boxing’ is the process of converting a value type to the reference type and ‘Unboxing’ is the process of converting reference to value type
B.	Boxing’ is the process of converting a reference type to value type and ‘Unboxing’ is the process of converting value type to reference type
C.	In ‘Boxing’ we need explicit conversion and in ‘Unboxing’ we need implicit conversion
D.	Both ‘Boxing’ and ‘Unboxing’ we need implicit conversion
Answer» B. Boxing’ is the process of converting a reference type to value type and ‘Unboxing’ is the process of converting value type to reference type

Discussion

599.	Scope of variable is related to definition of variable as: 1. Region of code within which variable value is valid and hence can be accessed. 2. No, relation with region where variable is declared its value is valid in entire scope.
A.	a
B.	b
C.	a, b
D.	None of the mentioned
Answer» B. b

Discussion

600.	DIFFERENCE BETWEEN KEYWORDS ‘VAR’ AND ‘DYNAMIC’ ?
A.	‘Var’ is introduced in C# (3.0) and ‘Dynamic’ is introduced in C# (4.0)
B.	‘Var’ is a type of variable where declaration is done at compile time by compiler while ‘Dynamic’ declaration is achieved at runtime by compiler
C.	For ‘Var’ Error is caught at compile time and for ‘Dynamic’ Error is caught at runtime
D.	All of the mentioned
Answer» E.

Discussion

Explore topic-wise MCQs in Technical Programming.

How is a string typically processed?

Which of these methods of class String is used to extract all the characters from a String object?

Which of these methods of the class String is used to obtain length of String object?

Which of these methods of class are used to remove the leading and backward whitespaces?

Which of these methods of class String is used to separate a substring from a String object?

Which of these data type values is returned by equals() method of String class?

Which of these methods returns the string such that some characters which are specified to be removed from the end of strings are removed from string by mentioning the number of characters to be removed?

Which of these methods of class String is used to check whether a substring exists at the beginning of the particular string?

Which of these methods is used to compare two strings such that after comparison output returns different integer values as ( 0 for false, 1 for true)?

Which of these methods of class String is used to compare two String objects for their equality?

Correct way to convert a string to uppercase using string class method()?

To perform comparison operation on strings supported operations are :

What does the term ‘immutable’ means in term of string objects?

What is the String in C# meant for?

Which of the following statement is correct about a string in C#.NET?

Select wrong statement about destructor in C#?

Operator used to free the memory when memory is allocated ?

Which of the following statements are correct?

Name a method which has the same name as that of class and which is used to destroy objects also called automatically when application is finally on process of being getting terminated.

The method called by clients of a class to explicitly release any resources like network,connection,open files etc.When the object is no longer required?

Which operator among the following signifies the destructor operator?

Which method has the same name as that of its class?

What is the return type of constructors?

Which among the following is the correct statement: Constructors are used to

Correct statement about constructors in C#.NET is ?

Number of constructors a class can define is ?

How many values does a function return?

Which of following statements are correct about functions?

Select correct differences between ‘=’ and ‘==’ in C#.

Which reference modifier is used to define reference variable?

The data members of a class by default are ?

“A mechanism that binds together code and data in manipulates, and keeps both safe from outside interference and misuse.In short it isolates a particular code and data from all other codes and data. A well-defined interface controls the access to that particular code and data.”

Which of following statements about objects in “C#” is correct?

What is the most specified using class declaration ?

The operator used to access member function of a class?

Which of the following is used to define the member of a class externally?

Which among the following is a conditional operator ?

Which of the following options is not a Bitwise Operator in C#?

Which of the following is/are not Relational operators in C#.NET ?

The correct way of incrementing the operators are :

Disadvantages of Explicit Conversion are?

Type of Conversion in which compiler is unable to convert the data type implicitly is?

The subset of ‘int’ data type is :

Implicit Conversion’ follows the order of conversion as per compatibility of data type as :

Types of ‘Data Conversion’ in C#?

What is the need for ‘Conversion of data type’ in C#?

Choose effective differences between ‘Boxing’ and ‘Unboxing’.

Scope of variable is related to definition of variable as: 1. Region of code within which variable value is valid and hence can be accessed. 2. No, relation with region where variable is declared its value is valid in entire scope.

DIFFERENCE BETWEEN KEYWORDS ‘VAR’ AND ‘DYNAMIC’ ?