الأحد، 17 مارس 2013

Solved MCQ of Database Management System (DBMS) Set - 8

1. Reflexivity property says that X - Y is true if Y is ………………….

A) Subset of X

B) Null set of X

C) Super set of Y

D) Subset of Y

2. Anything that affects the database schema is a part of

A) DML

B) DCL

C) DDL

D) All of the above

3. An instance of a relation is a time varying set of ………………….

A) Tuples

B) Rows

C) Both of them

D) None of them

4. In the ………………… mode any record in the file can be accessed at random

A) Sequential access

B) Random access

C) Standard access

D) Source access

5. Which can be used to delete all the rows if a table?

A) Delete * from table_name

B) Delete from table_name

C) Delete table_name

D) all rows cannot be deleted at a time.

6. Which if the following is not the type of data integrity.

A) Key integrity

B) Domain integrity

C) Entity integrity

D) Referential integrity

7. 4NF stands for ..

A) Fourth Normal File

B) Fourth Normal Form

C) Fourth Normal Fraction

D) Fourth Negative File

8. A ……………… allows to make copies of the database periodically to help in the cases of crashes & disasters.

A) Recovery utility

B) Backup Utility

C) Monitoring utility

D) Data loading utility

9. ………………. Allows definitions and query language statements to be entered; query results are formatted and displayed.

A) Schema Processor

B) Query Processor

C) Terminal Interface

D) None of the above

10. The main task carried out in the …………… is to remove repeating attributes to separate tables.

A) First Normal Form

B) Second Normal Form

C) Third Normal Form

D) Fourth Normal Form

Answers:

1. A) Subset of X
2. C) DDL
3. C) Both of them
4. B) Random access
5. A) Delete * from table_name
6. A) Key integrity
7. B) Fourth Normal Form
8. B) Backup Utility
9. C) Terminal Interface
10. D) Fourth Normal Form

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MCQ of Visual Basic dot net (VB.Net) with answer set-2

1. Using a ________ variable does not enable us to create read-only properties that are often required by a class.

A. public

B. private

C. protected

D. friend

2. A ___________ performs invisible tasks even if you write no code.

A. destructor

B. private method

C. constructor

D. function

3. The ___________________________________ does not describe inherited member functions, inherited operators, and overridden virtual member functions.

A. Class Library Reference

B. Library

C. Objects

D. Classes

4. The ______________________ group classes according to their common services.

A. objects

B. inheritance

C. Namespaces

D. programs

5. Whenever an application is created, a ______ is added.

A. Form

B. Class

C. Property

D. Object

6. _________ are interactive objects that you place in dialog boxes or other windows to carry out user actions.

A. Controls

B. Objects

C. Classes

D. Forms

7. The _______________ class provides static methods to start, stop, or filter Windows messages in an application.

A. Forms

B. Windows

C. Application

D. Control

8. The ___________is a systematic class framework used for the development of system tools and utilities.

A. .Net Framework Class Library (FCL)

B. .Net tools

C. Visual Basic 2005

D. Visual Basic 6

9. The ______________ method converts the value of this instance to a double representing the OLE automation date.

A. From OA Date

B.TO OA Date

C. Today

D. Now

10. The _________________ enable us to pass data between a program and a class.

A. Functions

B. Properties

C. Procedures

D. Variables

Answers:

1. A. public

2. C. constructor

3. A. Class Library Reference

4. C. Namespaces

5. A. Form

6. A. Controls

7. C. Application

8. A. .Net Framework.... (FCL)

9. B.TO OA Date

10. B. Properties

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Solved MCQs of Visual Basic.Net set-1

1. Which of the following Loop structure does not supported by VB.Net?

A. Do ................ Loop

B) For ................... Next

C) Do ................ While

D) For Each ............ While

2. The _____ model does not offer a model for source code reuse.

A. COM+

B. DCOM

C. COM

D. .Net

3. _____ allow custom items of information about a program element to be stored with an assembly's metadata.

A. Properties

B. Attributes

C. Methods

D. Classes

4. The corresponding .Net FCL type for Short is ___________.

A. System.Int32

B. System.Int64

C. System.Int16

D. System.Object

5. The member "clear" of the Array class that sets a range of array elements to zero, false or null reference is a _____________ method.

A. Shared

B. Method

C. Class

D. Object

6. The ___________ method converts an OLE automation date value to a DateTime Instance.

A. Today

B. TimeOfDay

C. Now

D. FromOADate

7. The function procedures are ___________ by default.

A. public

B. private

C. protected

D. inherited

8. Every optional argument in the procedure definition must specify a _________ value which must be a constant expression.

A. constant

B. default

C. integer

D. character

9. Type casting in VB.Net is implemented by means of ____________ statement.

A. Type()

B. TypeDef()

C. Btype()

D. Ctype()

10. State whether the statement true or false.

i) Function procedures are public by default.

ii) Function procedure return values whereas sub procedures cannot return a value to the calling procedure.

A. True, True

B. True, False

C) False, True

D) False, False

Answers:

1. C) Do .............. While
2. C. COM
3. B. Attributes
4. C. System.Int16
5. A. Shared
6. D. From OA Date
7. A. public
8. B. default
9. D. Ctype()
10. A. True, True

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السبت، 16 مارس 2013

What are the technical limitations of twitter accounts?

Technical limitations of Twitter

In order to provide the Twitter service and the ability to communicate and stay connected with others, there are some limitations on the type of content that can be published with Twitter. These limitations comply with legal requirements and technical limitations.Twitter has created some technical limitations for their users to reduce downtime and error pages. Currently the twitter has the following technical limitations.

You can send direct messages up to 250 per day.
You can send up to 1,000 tweets per day. The daily tweet limit further broken down into smaller limits for semi-hourly intervals.
You can change your account email four per hours.
You can follow others up to 1,000 per day. But you should not follow other aggressively.
There are limitations on account also once an account is following 2,000 other users, additional follow attempts are limited by account specific ratios. These limits include actions from all devices, including web, mobile, phone, API, etc. API requests from all third-party applications are tracked against the hourly API limit.

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الجمعة، 15 مارس 2013

How to prevent your twitter account from being suspended?

Twitter

Twitter Trying and making an effort to shield its users from spam and abuse. Technical abuse and user abuse isn't tolerated on Twitter.com, and can lead to permanent suspension. So you should know how to prevent your twitter account from being suspended.

I have written here some important tips you should not do for preventing your twitter account from being suspended.

You should not create serial accounts for disruptive or abusive purposes, or with overlapping use cases. Mass account creation may result in suspension of all related accounts.
You should not create accounts for the purpose of preventing others from using those account names.
You should not buy or sell Twitter usernames.
You should not publish or link to malicious content intended to damage or disrupt another user’s browser or computer or to compromise a user’s privacy.
You should not follow a large amount of users in a short amount of time.
You should not follow and unfollow people in a short time period, particularly by automated means.
You should have a small number of followers compared to the amount of people you are following.
Your update should not consist of only links; you should also have personal updates.
You should not post duplicate content over multiple accounts or multiple duplicate updates on one account.
You should not post multiple unrelated updates to a topic using #.
You should not send large numbers of duplicate @replies or mentions.
You should not add a large number of unrelated users to lists in an attempt to spam a service or link.
You should not repeatedly post other users' Tweets as your own.
You should not create or purchase accounts in order to gain followers.
You should not use obscene or pornographic images in your profile photo, header photo, or user background.

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الأربعاء، 6 مارس 2013

MCQ of Database Management System(DBMS) with answer set-7

1. Processed data is called ………………..

A) Raw data

B) Information

C) Useful data

D) Source

2. …………….. is a utility to capture a continuous record of server activity and provide auditing capability.

A) SQL server Profile

B) SQL server service manager

C) SQL server setup

D) SQL server wizard.

3. Data items grouped together for storage purposes are called a

A) record

B) title

C) list

D) string

4. …………. contains data assisting day to day activities of the organization.

A) Control database

B) Operational database

C) Strategic database

D) Sequential database

5. ………………… approach reduces time and effort required for design and lesser risk in database management.

A) Single global database

B) Top-down approach

C) Multiple databases

D) None of the above

6. HSAM stands for ……….

A) Hierarchic Sequential Access Method

B) Hierarchic Standard Access Method

C) Hierarchic Sequential and Method

D) Hierarchic Standard and Method

7. SQL server stores index information in the ………… system table

A) syst indexes

B) system indexes

C) sysind

D) sys indexes

8. The one guideline to be followed while designing the database is

A) A database design may be ambiguous.

B) Unrelated data should be in the same table so that updating the data will be easy.

C) It should avoid/reduce the redundancy.

D) An entity should not have attributes.

9. Which of the following is not a logical database structure?

A) Chain

B) Network

C) Tree

D) Relational

10. ……………. is a preferred method for enforcing data integrity

A) Constraints

B) Stored procedure

C) Triggers

D) Cursors

Answers:

1. B) Information
2. B) SQL server service manager
3. A) record
4. B) Operational database
5. C) Multiple databases
6. A) Hierarchic Sequential Access Method
7. D) sys indexes
8. C) It should avoid/reduce the redundancy.
9. A) Chain
10. A) Constraints

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List of bad ways for building backlinks

Since they are fastest ways for making huge amount of backlinks for their websites or blogs, some link building methods which you are using currently for promoting your website to increase the PageRank and Traffic may harm your website or blog instead of getting high PR and Traffic. I have presented here some bad ways of building backlinks which may get your site banned, penalized, and filtered from major search engine or both.

1. Submitting your site to 100's of paid directories which send no traffic and sell off topic.

2. As a new member, asking same questions at many forums on the same day.

3. Asking and answering the questions by making different accounts form same IP address.

4. Signing up blogs with spammy keywords to comment on blogs.

5. Using automated bots for blog commenting.

6. Making unnecessary and unrelated links while commenting others blog.

7. Sending huge link exchange emails which look like an automated bot sent them.

8. Signing up for profiles on forums you never intended coming again there.

9. Exchanging links on huge amount sites and placing their unrelated links on your site.

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