Dot Net Technology - Interview Questions

Companies Question/Answers Set -1

1. Basics pillars of OOPs?

2. What are the use of new keyword in overriding?

3. What is the difference between abstract class and interface?

4. Can we define property in interface?

5. What is the default access modifier for interface?

6. What is the default access modifier of abstract class?

7. What is the default access modifier of simple class?

8. What is the use of finalize keyword?

9. How to use dispose method to reclaim unmanaged object memory?

10. What is the use of dispose method?

11. What is call by value and call by reference?

12. What is out and ref keyword, how we can use both and difference between both?

13. What is pure virtual function?

14. What is Association in Entity framework?

15. What is Aggregation in Entity framework?

16. What is hash table and its use?

17. What is dictionary table?

18. Basic difference between hash table and dictionary?

19. What is the enum in c#

20. What are extension method?

21. What is the difference between String and string ?

22. What is mutable and immutable and its difference?

23. What are delegates?

24. What are events?

25. What is Func, Action and Predicates

26. How many parameters we can pass in func . Action and predicted

and maximum capacity of parameters for these.

27. What is IEnumerable and IQueryable?

28. What is Design Patterns?

29. What is Factory Pattern

30. What is Singleton Pattern

31. What problem Factory class resolves?

32. What is solid principles?

33. What is dependency inversion principles?

34. What is inbuilt feature of thread synchronization in c#?

35. What are ways to synchronize the thread?

36. What is the lock, mutax, semaphore?

37. What is Async?

38. What is result type of controller action?

39. What is the use of Task in threading?

40. What is the Before Render and Before Filter

41. What is the role of Action Filter?

42. What are the three Section in MVC Route?

43. What are the steps to execute a mvc project?

44. What are the route constraints?

45. How can we maintain the session in mvc?

46. What are the types of LINQ?

47. What are lambda expression in LINQ?

48. Difference between WCF and Web API

49. What are the Restful Services?

50. What are the rules of Restful services?

51. What are Request verbs?

52. What are post and put method?

53. What are parameter binding in web api?

54. What is skip and take function in linq?

55. Why select clause comes after from clause?

56. What is skip and skip while?

57. What is authorize attribute?

58. What is the difference between stored procedure and function?

59. Can we use update in stored procedure and function both?

60. What are Constraints in Sql Server?

61. What is the indexer?

62. What is clustered and non-clustered index?

63. What is the full outer join?

64. What is a self-join?

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ReactJS Basics

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Software Development Life Cycle

What is SDLC?

Software Development Life Cycle or SDLC is a set of processes usually employed by IT industry for designing, developing, and testing a high quality software product/system. It consists of several clearly stated working stages which software developers/engineers follow in order to plan for, design, build, test, and produce a system. The primary purpose of SDLC is to deliver high-quality systems that are as per end-users' expectations within an agreed-upon time frame and cost.

What are the most common stages of SDLC?

SDLC is a description of the stages in the life cycle of a software application.

Broadly, these stages are analysis, design, build, test, implement, and maintenance and support.

Analysis:

This stage involves breaking down the system in different pieces to analyze the situation, analyzing project goals, breaking down what needs to be created, and attempting to engage users so that definite requirements can be defined. The stage starts with a preliminary analysis, propose, alternative solutions, description of costs and benefits, and submision of a preliminary plan with recommendations. It is completed after considering inputs from customer, business team, market surveys, and domain experts in the industry. All these information is then utilized to plan the high-level project approach.

Design:

At this step, desired features and operations are described in detail, including screen layouts, business rules, process diagrams, pseudocode, and other documentation.

The design stage takes as its initial input the requirements identified in the approved requirements document. For each requirement, a set of one or more design elements will be produced as a result of interviews, workshops, and/or prototype efforts.

Build:

The actual code is written here.

Test:

All the modules are brought together into a special testing environment, then checked for errors, bugs, and interoperability.

Implement:

This is the final stage of initial development, where the software is put into production and runs actual business.

Maintenance and Support:

During the maintenance stage of the SDLC, the system is assessed/evaluated to ensure it does not become obsolete. This is also where changes are made to initial software.

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JavaScript Questions & Answers

1) What is JavaScript?

Javascript is client side scripting Language that have the object oriented capabilities and It is light weighted language and through this we can easily play with DOM elements

2) What are the datatypes supported in JavaScript?

JavaScript supports almost all data types used in C# and below are the list

· Number

· String

· Boolean

· Undefined

· Null

· Object

3) What are the advantages of JavaScript?

· Through JavaScript, We can validate webpage in client side and no need to send it to Server Side

· JavaScript is lightweight so the response is quick

· JavaScript are used to give a rich interface to provide the functionality like drag and drop components,

4) How can we use JavaScript?

JavaScript can be used as like suppose you have to assign a data to a variable

var Name= “Kamal”;

In JavaScript, we have to “var” to declare a type of data

Support you want to create an object of data

var lstStudent = {

Name : “Ajay”,

Age: 33

} ;

5) Is JavaScript case-sensitive language?

Yes, JavaScript is case-sensitive so always try to follow a Nomenclature while declaring a variable.

6) How can we write JavaScript Code to start?

We can write code in <head> tags and can include JavaScript file into it.

For creating a function in JavaScript , just use function and the function Name as below

example

Prototype

function functionName(parameters ){

// Logic here

}

Real Example

function GetName(var status){

if (status==0){

// do this

}

else

{

//do that

}

JavaScript code is written by two ways as follows

Inline

<head>

function CallMethod() {

//code for this method

}

</script>

</head>

JavaScript file

<head>

</head>

7) How can we create Array in JavaScript?

For creating an array , we have to declare by as below

var y= [];

assigning the elements

var mm= [1,3,5,7,9];

adding more elements to array

mm.push(10);

8) What are the important function names used to get elements from DOM?

There are many functions available as below to get data from DOM as per our need so some of them are as below

getElementById- if you want to get element by ID then use this by as

document.getElementById("articles-3")

getElementsByName - if you want to get element by Name then use this by as

document.getElementsByName(“txtName”)

getElementsByClassName - if you want to get element by Class NAme then use this by as

document.getElementsByClassName(“btnClass”)

getElementsByTagName - if you want to get element by Tag Name then use this by as

document.getElementsByTagName(“rounded”)

9) What is the difference between null and undefined in JavaScript?

· undefined means variable is declared but not yet assigned but null itself a value

· null means no value for that variable but unassigned itself a type in JavaScript so it show a values itself

10) What is the differences between “===” , “==” and “=” in JavaScript?

“=” is used to assigning a value to variable

var x="ajay"

“==” is used to Compare two Values irrespective of their type

var a= 13

(a==x) will give false

“===” is used Compare two Values and strict to their type also

var x="ajay"

var y="ajay1"

var z="ajay";

x===z will give true as type and content also same

x===y will give false but type is same but content is different

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Dot Net Technology - Interview Questions

Companies Question/Answers Set -1

ReactJS Basics

Software Development Life Cycle

JavaScript Questions & Answers

Companies Question/Answers Set -1

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