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C# Interview questions asked in Mumbai based IT company.

By Shiv Prasad Koirala in C#
Sep 28th, 2017
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Which of the following are used for an HTML5 document

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<!DOCTYPE html>>
<!DOCTYPE html5>
<!DOCTYPE html5 PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html5/strict.dtd">
<!DOCTYPE html5 PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

Which of the following are special kinds of tables that hold detailed information about other tables, fields, indexes, relationships, and other features of the DBMS?

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Queries
Catalog
System Tables
Forms
Schedules

Characteristics of a service-oriented architecture (SOA)-based system

What are the most important characteristics of a system that uses service-oriented architecture(SOA)?(select all that apply)

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Performance of the entity classes
Loose coupling
XML web services
Stateful session handling in a load-balanced cluster
Well-defined contracts between message producers and consumers

Which of the following are types of NoSQL databases? (select all that apply)

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Key value store
Tree store
Structural store
Hierarchical store
Document store

Which of the following are situations suitable for the use of EDA instead of SOA?

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Vertical interaction between the layers of functional breakdown.
Horizontal communication between tiers in a process chain.
Functional request reply communication; the requester waits for a response.
Processes that cross recognizable functional organization borders.
Transactional processes that require commit and roll back.

What of the following can be considered Drawbacks of using micro service architecture against ordinary monolithic style?

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Code duplication
Highly coupled services
Change cycles are tied together
Expensive communication channels
Hard to scale

Which of the following are the main purposes of relational database design?

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To maintain data integrity
To divide the base data into logical units called tables
To avoid redundancy
To provide quick query analysis and transparency

Which of the following properties do not apply to a database system which allows partial completion of the operations from a transaction?

PICK ONE OF THE CHOICES

durability
consistency
isolation
atomicity

Consider the following guidelines when designing for exception management, except which one?

PICK ONE OF THE CHOICES

Design a global error handler to catch unhandled exceptions.
Design your application to recover to a known good state after an exception occurs.
Always use exceptions to control logic flow.

Design an appropriate logging and notification strategy that does not reveal sensitive information for critical errors and exceptions.

Tables EMPLOYEES has 5 rows. Consider the following sequence of SQL statements :-

SQL> CREATE TABLE myTable SELECT AS (SELECT * FROM EMPLOYEE);

SQL> INSERT INTO myTable SELECT * FROM myTable;

If the SQL statement SELECT COUNT (*) FROM myTable; is executed after executing all the statements listed above, what will it print?

PICK ONE OF THE CHOICES

80
25
20
5
Not sure on the above question the first create syntax will give error and the other will not work. Recheck the question.

Let's consider that we have a REST web service for handling interview questions deployed at http://interview-questions.com. What HTTP method should this web service support in order to allow clients to create new questions at a particular location (e.g. at http://interview-questions.com/question/1)?

PICK ONE OF THE CHOICES

PUT
POST
GET
PATCH

In order to respect ISP, one of the SOLID principles, we should:

PICK ONE OF THE CHOICES

always use interfaces, not concrete classes
not force the client to depend on methods it does not need
use rich, general interfaces that have many methods
use decoupled components will well-defined interfaces

Difference between cluster computing and cloud computing?

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In cloud, computers work together but in cluster, computers work independently.
In cloud, resources are treated independently but in cluster, the resources are treated as one system.
In cloud, resources are virtualized but in cluster, resources are running physically on a computer system.
In cloud, resources are not as reliable as in cluster because cluster has redundant nodes for high availability.

Which of the following correctly describe the protocols usually involved in an email exchange?

PICK ONE OF THE CHOICES

SMTP or POP3 are used for receiving messaged and IMAP is used for sending messages.
SMTP is used for sending messages and IMAP or POP3 are used for receiving messages.
SMTP is used for receiving messages and IMAP or POP3 are used for sending messages.
The receival and sending of messages use the same protocols and the protocol used can be SMTP, IMAP or POP3.

Your company has two hosting environments. One LAN where intranet corporate applications are hosted. Another DMZ environment where internet applications for the customers are hosted. One of the application X in the DMZ needs to access a content directory Y in the LAN. Which of the following methods are the safest to do so.

Open specific ports betwen the LAN's Y server and DMZ's X server.
Apply bandwith limitations between the application X and the directory Y.
Use an SSL connection from the application X to the content directory Y.
Use in the application X, a security account having read-only access to specific Y data.

PICK ONE OF THE CHOICES

1 and 3
2, 3 and 4
1, 3 and 4
1 and 4

How does JSONP work?

PICK ONE OF THE CHOICES

It makes server response text act like an injected <script> element
It sends an HTTP "Access-Control-Allow-Origin" header to the server that asks for permission to make a cross-origin request
It encodes server responses in a special data type that is ignored by the browser's JavaScript parser
None of the above

Which one of the following is not a design pattern used in communication.

PICK ONE OF THE CHOICES

Active Object
Entity Translator
Active Record
Reliable Sessions

What of the following is an example of a hash collision?

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Two different hash functions produce the same address for a given key: h1( key ) = h2( key )
A hash function produces the same address for two different keys: h( key1 ) = h( key2 ) where key1 =\= key2
Two different hash functions produce the same address for two different keys: h1( key1 ) = h2( key2 ) where key1 =\= key2
A hash function produces the same address for two different keys with different lengths: h( key1 ) = h( key2 ) where length(key1) =\= length (key2)
A hash function produces the same address for two keys of the same length: h( key1 ) = h( key2 ) where length(key1) = length(key2).

Which one of the following is a cryptographic protocol used to secure HTTP connection?

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Stream control transmission protocol
Transport layer security (TLS)
Explicit congestion notification (ECN)
Resource reservation protocol

What is the purpose of XMLHttpRequest?

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Multiple loading
Load content by loading new document
Load content without loading new document
None of the mentioned

Which of the following pattern refers to creating duplicate object while keeping performance in mind?

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Builder Pattern
Filter Pattern
Bridge Pattern
Prototype Pattern

Which of the following is true for MVC architecture?

Select the best answer:

PICK ONE OF THE CHOICES

View should contain the logic related to user Interface and client side validations, controller should contain the logic required to return right view and all the business logic should be contained in the Model.
View should contain the logic related to user Interface, controller should contain the flow control and business logic of the application while model should contain database access logic.
View should contain the logic related to user Interface, controller should contain the logic required to return right view and all the application business logic, validation logic, and database access logic should be contained in the Model.
View should contain the logic related to user Interface and client side validations, controller should contain the logic required to return right view and all the application business logic, validation logic, and database access logic should be contained in the Model.