C# Test1
- 1.
What is redefining a single method multiple times so that you can use the same method name, but vary the number and types of parameters?
- A.
Encapsulation
- B.
Abstaction
- C.
Overloading
- D.
Overriding
Correct Answer
C. Overloading -
- 2.
Where can polymorphism be applied?(Choose any 3 options)
- A.
Methods
- B.
Indexers
- C.
Properties
- D.
Fields
Correct Answer(s)
A. Methods
B. Indexers
C. Properties -
- 3.
Storage or sucket based network streams
- A.
Basic
- B.
SOAP
- C.
Binary
- D.
XML
Correct Answer
C. Binary -
- 4.
Which of the following property specifies the type of validation that the XmlValidatingReader should perform?
- A.
XmlReaderValidationType
- B.
ReaderValidationType
- C.
XmlValidatingReaderType
- D.
Validation Type
Correct Answer
D. Validation Type -
- 5.
What does FileStream objects do?
- A.
Exposes a file in XML Mode
- B.
Exposes a file in Text Mode
- C.
Exposes a Stream around a file, supporting synchronous and a aynchronous write
- D.
Exposes a Stream around a file, supporting synchronous and a synchronous read operations
Correct Answer(s)
C. Exposes a Stream around a file, supporting synchronous and a aynchronous write
D. Exposes a Stream around a file, supporting synchronous and a synchronous read operations -
- 6.
What are your observations on the following code?(Choose any 2) private void CheckForReferenceType<T>(T type) where T:class, IHoldVal { type.Val = 3; }
- A.
Code denotes Reference Type Generics Constraint
- B.
Code denotes usage of Generics Constraint
- C.
Code denotes Base Class Generics Constraint
- D.
Code denotes Interface Generics Constraint
Correct Answer(s)
A. Code denotes Reference Type Generics Constraint
D. Code denotes Interface Generics Constraint -
- 7.
Which of the following describes the web services, its parameters & how to use it?
- A.
WSDL
- B.
UDDI
- C.
XML
- D.
SOAP
Correct Answer
A. WSDL -
- 8.
How does the throw statement work in exception handling?
- A.
The throw statement terminates the execution of the program and passes the control to the finally block in the calling program
- B.
The throw statement raises a new exception, and the CLR unwinds the stack looking for the entry point of the program int the call chain and restarts the program
- C.
The throw statement attempts to pass the control to the nearest catch statement, and the CLR unwinds the stack looking for an exception handler, try/catch, in the call chain with a catch block
- D.
The throw statement raises a new exception, and the CLR unwinds the stack looking for an exception handler, try/catch, in the call chain with a catch block
Correct Answer
D. The throw statement raises a new exception, and the CLR unwinds the stack looking for an exception handler, try/catch, in the call chain with a catch block -
- 9.
What does SOAP Header element contain?
- A.
SOAP Header element contains message hierarchy
- B.
The SOAP Header element contains application-specific information, like authentication, payment, etc about the SOAP message
- C.
SOAP Header element contains definition of a message
- D.
SOAP Header element contains verbose description of a message
Correct Answer
C. SOAP Header element contains definition of a message -
- 10.
Which of the following exception is thrown for explicit conversions?
- A.
ExternalException
- B.
SystemException
- C.
InvalidOperationException
- D.
InvalidCastException
Correct Answer
D. InvalidCastException -
- 11.
Identify approaches that help reduce data over the network(Choose any 3)
- A.
Return only the columns and rows that you need
- B.
Return complete data
- C.
Provide data paging for large results
- D.
Cache data where possible
Correct Answer(s)
A. Return only the columns and rows that you need
C. Provide data paging for large results
D. Cache data where possible -
- 12.
Rearrange the stages of Garbage Collection process 1.Objects that are not referenced anymore are cleaned up 2.Garbage Collect constructs the active-object graph 3.Reset the Next Object Pointer so that the next object is allocated 4.Heap objects are compacted to eliminate heap fragmentation
- A.
A.2,1,4,3
- B.
B.1,2,3,4
- C.
C.3,2,4,1
- D.
D.4,3,1,2
Correct Answer
A. A.2,1,4,3 -
- 13.
How do you create a Client proxy class in C# for XML web service?
- A.
Wsdl http://hostServer/WebserviceRoot/WebServiceName.asmx?XML
- B.
Wsdl/WSDL <>http://hostServer/WebserviceRoot/WebServiceName.asmx<>
- C.
Wsdl http://hostServer/WebserviceRoot/WebServiceName.asmx?WSDL
- D.
Wsdl http://hostServer/WebserviceRoot/WebServiceName.asmx
Correct Answer
C. Wsdl http://hostServer/WebserviceRoot/WebServiceName.asmx?WSDL -
- 14.
Which is the exception that is thrown when a non-fatal application error occurs?
- A.
InvalidCastException
- B.
SystemException
- C.
StackOverflowException
- D.
ApplicationException
Correct Answer
D. ApplicationException -
- 15.
Which of the following statements are true about finally block? (Choose any 3)
- A.
Finally block is executed even if an error occurs
- B.
Finally block is definately executed when leaving a try block
- C.
Finally block is used to perform any necessary clean-up jobs
- D.
Finally block is not executed if an error occurs
Correct Answer(s)
A. Finally block is executed even if an error occurs
B. Finally block is definately executed when leaving a try block
C. Finally block is used to perform any necessary clean-up jobs -
- 16.
What does the following code do? string contents = File.ReadAllText(fileNameWithPath):
- A.
Reads all contents from a text file
- B.
Reads all contents from a text file to the memory
- C.
Reads all contents from a text file to a variable
- D.
Reads first line from a text file
Correct Answer
C. Reads all contents from a text file to a variable -
- 17.
What are your obeservations on the following code?(Choose 2) private static object m_CustomersLock = new object(); private static List<string> m_Customers = new List<string>(); try { Monitor.Enter(m_CustomersLock); m_Customers.Add("General Electric"); }
- A.
Following code blocks all the threads from accessing Customer list
- B.
Following code ensures only a single thread is blocked from accessing Customer List
- C.
Lock on m_CustomersLock has to be released in a finally block
- D.
Extension methods are called by instance methods syntax
- E.
Extension methods are defined as protected methods
- F.
Extension methods are defined as static methods
- G.
Extension methods are called by static methods
Correct Answer(s)
D. Extension methods are called by instance methods syntax
F. Extension methods are defined as static methods -
- 18.
What is the definition of polymorphism?
- A.
The capability to dynamically invoke methods in a class based on their type
- B.
Method of determining what is required by the object is contained within the object
- C.
An object-oriented principle relating to how one class, a derived class, can share the characteristics and behaviour from another class a base class
- D.
An object-oriented principle associated with hiding the internals of an object from the outside world
Correct Answer
A. The capability to dynamically invoke methods in a class based on their type -
- 19.
What does the following code denote?(Choose any 2) public class Contact { public string Name {get;set;} public string Email{get;set;} public string Address{get;set;} public string City{get;set;} protected string FullAddress() { return Address+' '+City; } } class Customer : Contact { public string FullAddress() { string fullAddress =" "; //Some statement return fullAddress; } }
- A.
It shows how a method in base class in hidden from the user
- B.
It is an example of inheritance
- C.
It shows how a method in base class can be used in the derived class
- D.
It shows how polymorphism is implemented
Correct Answer(s)
A. It shows how a method in base class in hidden from the user
B. It is an example of inheritance -
- 20.
What are your observations on the following cod?(Choose any 2) using system; struct SimpleStruct { protected int xval; public int X { get { return xval; } set { if (value <100) xval = value; } } public void DisplayX() { Console.WriteLine("The stored values is:{0}, xval); } }
- A.
Struct members can be inherited
- B.
Following code is an example of a class
- C.
Struct members cannot be declared as protected
- D.
Following code is an example of a struct
Correct Answer(s)
C. Struct members cannot be declared as protected
D. Following code is an example of a struct -
- 21.
Which of the following property gets the XmlReader to construct XmlValidatingReader?
- A.
Reader
- B.
XmlLang
- C.
ReadState
- D.
XmlReader
Correct Answer
A. Reader -
- 22.
Which of the following is the necessary condition for implementing delegates?
- A.
Class declaration
- B.
Inheritance
- C.
Run-time Polymorphism
- D.
Exceptions
- E.
Compile-time Polymorphism
Correct Answer
A. Class declaration -
- 23.
Which of the following statements are correct about the delegate declaration given below? delegate void del(int i);
- On declaring the delegate a class called del will get created.
- The signature of del need not be same as the signature of the method that we intend to call using it.
- The del class will be derived from the MulticastDelegate class.
- The method that can be called using del should not be a static method.
- The del class will contain a one-argument constructor and an lnvoke() method.
- A.
1, 2 and 3 only
- B.
1, 3 and 5 only
- C.
2 and 4 only
- D.
4 only
- E.
All of the above
Correct Answer
B. 1, 3 and 5 only - 24.
Which of the following is the correct way to call subroutine MyFun() of the Sample class given below? class Sample { public void MyFun(int i, Single j) { Console.WriteLine("Welcome to IndiaBIX !"); } }
- A.
Delegate void del(int i); Sample s = new Sample(); del d = new del(ref s.MyFun); d(10, 1.1f);
- B.
Delegate void del(int i, Single j); del d; Sample s = new Sample(); d = new del(ref s.MyFun); d(10, 1.1f);
- C.
Sample s = new Sample(); delegate void d = new del(ref MyFun); d(10, 1.1f);
- D.
Delegate void del(int i, Single]); Sample s = new Sample(); del = new delegate(ref MyFun); del(10, 1.1f);
Correct Answer
B. Delegate void del(int i, Single j); del d; Sample s = new Sample(); d = new del(ref s.MyFun); d(10, 1.1f); -
- 25.
Which of the following statements are correct about an ArrayList collection that implements the IEnumerable interface?
- The ArrayList class contains an inner class that implements the IEnumerator interface.
- An ArrayList Collection cannot be accessed simultaneously by different threads.
- The inner class of ArrayList can access ArrayList class's members.
- To access members of ArrayList from the inner class, it is necessary to pass ArrayList class's reference to it.
- Enumerator's of ArrayList Collection can manipulate the array.
- A.
1 and 2 only
- B.
1 and 3 and 4 only
- C.
2 and 5 only
- D.
All of the above
- E.
None of the above
Correct Answer
B. 1 and 3 and 4 only - 26.
In which of the following collections is the Input/Output index-based?
- Stack
- Queue
- BitArray
- ArrayList
- HashTable
- A.
1 and 2 only
- B.
5 only
- C.
3 and 4 only
- D.
1, 2 and 5 only
- E.
All of the above
Correct Answer
C. 3 and 4 only - 27.
In a HashTable Key cannot be null, but Value can be.
- A.
True
- B.
False
Correct Answer
A. True -
- 28.
Which of the following is the correct way to access all elements of the Queue collection created using the C#.NET code snippet given below?
- A.
IEnumerator e; e = q.GetEnumerator(); while (e.MoveNext()) Console.WriteLine(e.Current);
- B.
IEnumerable e; e = q.GetEnumerator(); while (e.MoveNext()) Console.WriteLine(e.Current);
- C.
IEnumerator e; e = q.GetEnumerable(); while (e.MoveNext()) Console.WriteLine(e.Current);
- D.
IEnumerator e; e = Queue.GetEnumerator(); while (e.MoveNext()) Console.WriteLine(e.Current);
Correct Answer
A. IEnumerator e; e = q.GetEnumerator(); while (e.MoveNext()) Console.WriteLine(e.Current); -
- 29.
Which of the following will be the correct output for the C#.NET program given below? namespace IndiabixConsoleApplication { class Sample { int i; Single j; public void SetData(int i, Single j) { i = i; j = j; } public void Display() { Console.WriteLine(i + " " + j); } } class MyProgram { static void Main(string[ ] args) { Sample s1 = new Sample(); s1.SetData(10, 5.4f); s1.Display(); } } }
- A.
10 5
- B.
10 5.4
- C.
10 5.400000
- D.
0 0
- E.
None of the above
Correct Answer
D. 0 0 -
- 30.
Which of the following statements are correct?
- Data members ofa class are by default public.
- Data members of a class are by default private.
- Member functions ofa class are by default public.
- A private function of a class can access a public function within the same class.
- Member function of a class are by default private
- A.
1, 3, 5
- B.
1, 4
- C.
2, 4, 5
- D.
1, 2, 3
- E.
None of these
Correct Answer
C. 2, 4, 5 - 31.
Which of the following statements are correct about the this reference?
- this reference can be modified in the instance member function of a class.
- Static functions of a class never receive the this reference.
- Instance member functions of a class always receive a this reference.
- this reference continues to exist even after control returns from an instance member function.
- While calling an instance member function we are not required to pass the this reference explicitly.
- A.
1, 4
- B.
2, 3, 5
- C.
3, 4
- D.
2, 5
- E.
None of these
Correct Answer
B. 2, 3, 5 - 32.
Which of the following statements are correct about an interface in C#.NET?
- A class can implement multiple interfaces.
- Structures cannot inherit a class but can implement an interface.
- In C#.NET, : is used to signify that a class member implements a specific interface.
- An interface can implement multiple classes.
- The static attribute can be used with a method that implements an interface declaration.
- A.
1, 2, 3
- B.
2, 4
- C.
3, 5
- D.
None of the above.
Correct Answer
A. 1, 2, 3 - 33.
Which of the following statements is correct?
- A.
When a class inherits an interface it inherits member definitions as well as its implementations.
- B.
An interface cannot contain the signature of an indexer.
- C.
To implement an interface member, the corresponding member in the class must be public as well as static.
- D.
Interfaces members are automatically public.
Correct Answer
D. Interfaces members are automatically public. -
- 34.
Which of the following statements should be added to the subroutine fun( ) if the C#.NET code snippet given below is to output 9 13? class BaseClass { protected int i = 13; } class Derived: BaseClass { int i = 9; public void fun() { // [*** Add statement here ***] } }
- A.
Console.WriteLine(base.i + " " + i);
- B.
Console.WriteLine(i + " " + base.i);
- C.
Console.WriteLine(mybase.i + " " + i);
- D.
Console.WriteLine(i + " " + mybase.i);
- E.
Console.WriteLine(i + " " + this.i);
Correct Answer
B. Console.WriteLine(i + " " + base.i); -
- 35.
Assume class B is inherited from class A. Which of the following statements is correct about construction of an object of class B?
- A.
While creating the object firstly the constructor of class B will be called followed by constructor of class A.
- B.
The constructor of only class B will be called.
- C.
The constructor of only class A will be called.
- D.
The order of calling constructors depends upon whether constructors in class A and class B are private or public.
- E.
While creating the object firstly the constructor of class A will be called followed by constructor of class B.
Correct Answer
E. While creating the object firstly the constructor of class A will be called followed by constructor of class B. -
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Feb 11, 2013Quiz Edited by
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Dec 29, 2011Quiz Created by
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