Solved Objective Questions for IT Officer Exam Part-3

Mesh topology (Photo credit: Wikipedia)

1. What is the name of the network topology in which there are bi-directional links between each possible node?

A) Ring


B) Star

C) Tree

D) Mesh

2. Which scheduling policy is most suitable for time-shared operating system?

A) Shortest job first

B) Round-robin

C) Elevator

D) First-come-first-serve



3. A next-generation web content development language, ................ typically refers to a suite of technologies that allow developers to store data in a readable format.

A) HTML

B) XML

C) XSL

D) PHP



4. A(n) ................... is a private corporate network that uses standard Internet protocols and interfaces.

A) Internet

B) Extranet

C) Local Area Network

D) Intranet



5. Integrated Circuit is related to .......................... generations computers.

A) Second

B) Third

C) Fourth

D) Fifth




6. Which of the following is the most suitable scheduling scheme in a real time operating system?

A) Round robin

B) First come first serve

C) Preemptive scheduling

D) Random Scheduling



7. Kernel is .........

A) Considered as the critical part of the operating system

B) The software which monitors the operating system

C) The set of primitive functions upon which the rest of operating system functions are build up

D) None of the above



8. Which of the following storage is fastest?

A) RAM

B) ROM

C) Register

D) Blu-ray disc



9. A polymorphic virus .........

A) Modifies its program code each time it attaches itself to another program or file.

B) Is a malicious-logic program that copies itself repeatedly in memory or on a disk drive until no memory or disk space remains.

C) A malicious-logic program that hides within or looks like a legitimate program.

D) Infects a program file, but still reports the size and creation date of the original, uninfected program.



10. Cache Memory ......

A) Helps to store more data in hard disk

B) Placed between main memory and microprocessor

C) Stores data permanently

D) Holds last time visited web site only

Answers:

1. What is the name of the network topology in which there are bi-directional links between each possible node?

D) Mesh

Explanation: A mesh network is a local area network (LAN) that employs one of two connection arrangements, full mesh topology or partial mesh topology. In the full mesh topology, each node (workstation or other device) is connected directly to each of the others. Read More: mesh network -whatis.techtarget.com and Network Topology - wikipedia.org


2. Which scheduling policy is most suitable for time-shared operating system?

B) Round-robin

Explanation: In the round robin scheduling, processes are dispatched in a FIFO manner but are given a limited amount of CPU time called a time-slice or a quantum. If a process does not complete before its CPU-time expires, the CPU is preempted and given to the next process waiting in a queue. Read More: CPU/Process Scheduling -personal.kent.edu


3. A next-generation web content development language, ................ typically refers to a suite of technologies that allow developers to store data in a readable format.

B) XML

Explanation: Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. It is a textual data format with strong support via Unicode for the languages of the world. Although the design of XML focuses on documents, it is widely used for the representation of arbitrary data structures. Read More: Extensible Markup Language (XML) -wikipedia.org


4. A(n) ................... is a private corporate network that uses standard Internet protocols and interfaces.

D) Intranet

Explanation: An intranet is a private computer network that uses Internet Protocol technologies to securely share any part of an organization's information or network operating system within that organization. Read More: Intranet - princeton.edu

5. Integrated Circuit is related to .......................... generations computers.

B) Third

Explanation:The mass increase in the use of computers accelerated with 'Third Generation' computers. These generally relied on Jack Kilby's invention of the integrated circuit (or microchip), starting around 1965. Read More: History of computing hardware - wikipedia.org


6. Which of the following is the most suitable scheduling scheme in a real time operating system?

C) Preemptive scheduling

Explanation: A real-time operating system (RTOS) is an operating system (OS) intended to serve real-time application requests. It must be able to process data as it comes in, typically without buffering delays.

A scheduling decipline is preemptive if, once a process has been given the CPU can taken away. The strategy of allowing processes that are logically runable to be temporarily suspended is called Preemptive Scheduling and it is contrast to the "run to completion" method.


7. Kernel is .........

C) The set of primitive functions upon which the rest of operating system functions are build up

Explanation: The Operating System Kernel does Basic set of primitive operations and processes Like a function call or macro expansion, Part of the calling process, Critical section for the process etc. Read more: Process Scheduling -cs.umsl.edu


8. Which of the following storage is fastest?

C) Register


Explanation: Register is faster than RAM, ROM and Blu-ray disc.


9. A polymorphic virus .........

A) Modifies its program code each time it attaches itself to another program or file.

Explanation: Polymorphic viruses create varied (though fully functional) copies of themselves as a way to avoid detection by anti-virus software. Some polymorphic virus use different encryption schemes and require different decryption routines. Read More: Polymorphic viruses

10. Cache Memory ......

B) Placed between main memory and microprocessor

Explanation: The Performance of a microcomputer system can be improved significantly by introducing a small expensive but fast memory between microprocessor and main memory. Read more: Cache Memory

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Solved MCQ for IT Officer Exam Part-2

SWIFT Logo (Photo credit: Wikipedia)

1. SWIFT stands for:

A) Society for Worldwide Interbank Financial Telecommunication

B) Society for Worldwide International Financial Telecommunication

C) Society for Worldwide Interbank Financial Transmission

D) Society for Worldwide Interbank Financial Transfer

2. Which one is the correct statement?

A) XML is a technology used only on the internet.

B) XML is a programming language.

C) XML is highly suitable data exchange between two different systems.

D) XML is scripting language.

3. Decision support systems usually

A) serve managers interested in weekly, monthly and yearly results, not day-to-day activities.

B) help managers make decisions that are unique, rapidly changing and not easily specified in advance.

C) provide managers with a generalized computing and telecommunications capacity that can be applied to a changing array of problems.

D) perform and record the daily routine transactions necessary to the conduct of business.

4. Identifying customers and markets using data on demographics, markets, consumer behavior and trends is an example of a (n):

A) operational-level sales and marketing information system

B) knowledge-level sales and marketing information system

C) strategic-level sales and marketing information system

D) management-level sales and marketing information system

5. Enterprise systems support:

A) manufacturing process

B) financial and accounting process

C) human resource processes

D) all of the above

6. An example of an information to support a strategic management is:

A) spreadsheet model of income projections

B) business intelligence system

C) electronic document management system

D) financial information system

7. Which type of software is focused in supporting communication, collaboration and coordination?

A) E-business software

B) CRM software

C) groupware

D) SCM software

8. A data warehouse is .........

A) updated by end users

B) contains numerous naming conventions and formats

C) organized around important subject areas

D) contains only current data

9. Capability of data mining is to build ................ models.

A) retrospective

B) interrogative

C) predictive

D) imperative

10. A link is said to be ............... link if it is between pages with different domain names.

A) intrinsic

B) transverse

C) direct

D) contrast

Answers:

1. SWIFT stands for:

A) Society for Worldwide Interbank Financial Telecommunication

Explanation: The Society for Worldwide Interbank Financial Telecommunication provides a network that enables financial institutions worldwide to send and receive information about financial transactions in a secure, standardized and reliable environment. Read More at: wikipedia.org

2. Which one is the correct statement?

C) XML is highly suitable data exchange between two different systems.

Explanation: XML data is stored in plain text format. This provides a software and hardware independent way of storing data. XML is highly suitable data exchange between two different systems, since the data can be read by different incompatible applications. Read More at: How Can XML be Used?-w3schools.com.

3. Decision support systems usually

B) help managers make decisions that are unique, rapidly changing and not easily specified in advance.

Explanation: Decision support systems usually help managers make decisions that are unique, rapidly changing and not easily specified in advance. Read More at: Decision support systems -books.google.com

4. Identifying customers and markets using data on demographics, markets, consumer behavior and trends is an example of a (n):

B) knowledge-level sales and marketing information system

Explanation: Identifying customers and markets using data on demographics, markets, consumer behavior and trends is an example of a knowledge-level sales and marketing information system.

5. Enterprise systems support:

D) all of the above

Explanation: Enterprise systems support manufacturing process, financial and accounting process and human resource processes. Read More: Enterprise systems -books.google.com

6. An example of an information to support a strategic management is:

B) business intelligence system

Explanation: An example of an information to support a strategic management is business intelligence system. Read More: Business Intelligence System -books.google.com

7. Which type of software is focused in supporting communication, collaboration and coordination?

C) groupware

Explanation: Groupware is a type of software is focused in supporting communication, collaboration and coordination. Read More: Groupware -wikipedia.org

8. A data warehouse is .........

C) organized around important subject areas

Explanation: A data warehouse can be used to analyze a particular subject area. Read more: Data warehouse definition -1keydata.com

9. Capability of data mining is to build ................ models.

C) predictive

Explanation: Capability of data mining is to build predictive models.

10. A link is said to be ............... link if it is between pages with different domain names.

B) transverse

Explanation: A link is said to be transverse link if it is between pages with different domain names and A link is said to be intrinsic link if it is between pages with same domain names. Read More: transverse and intrinsic link -books.google.com

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How to Delete Browsing History From Browser ?

As you browse the web, browsers can remember lots of information such as the website you have visited, files you have downloaded and other more, such information are called browsing history. Most of the web browsers stores information on their browsing history, if you are using public computer or a shared computer and want to delete browsing history from computer, can do it with different methods. Here I have explained different methods for deleting browsing history from different browsers
.

Deleting Browsing History From Control Panel

1. Go to control panel from start button. If you are viewed by category option, Click on Network and Internet option. 

2. On the internet option, click on 'Delete Browsing History and Cookies'.

OR,  On the view by icon option, click on 'Internet Options'. On the browsing history of general tab, click on Delete button.

Check mark on the options for which you want to delete and click on delete button.

Deleting Browsing History From Chrome Browser

1. Click on 'Customize and control Google Chrome' icon on the top right corner and click on History option.

2. Click on 'Clear browsing data...' button.

3. On the new window check the options and click on  'Clear browsing data...'  button.

Deleting Browsing History From Mozilla Firefox

1. Click on Firefox button on top left corner, mouse over on 'History' option and click on 'Clear recent history'.

2. Select the time range to clear and click on 'Clear Now' button.

Deleting Browsing History From Internet Explorer

1. On the Tools options, click on Internet Options. 

2. On the browsing history of general tab, click on Delete button. On the new window, check mark on the options for which you want to delete and click on delete button as given above.

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Best Online Backlink Checker Tools List

I have already posted the most effective tips for your link building success on my previous post, you can achieve best backlinks for your websites only by applying most effective and successful link building strategies. While gaining quality backlinks for your website, you have to find out and analyze the links you have gained. By using these best online backlink checker tools which I have listed here, you can discover your or your competitors websites backlink from the reports or information generated by them.  

List of Best Online Backlink Checker Tools

# 1) MajesticSEO.com: It is one of the best online backlink checker tool and provides free as well as paid service to analyze your website. It provides the basic URL information such as number of external backlinks, referring domains, referring IPs etc. History chart also shows external backlinks and referring domains over the last 90 days. You can get detailed report about backlinks and anchor text from the respective tabs.

# 2) OpenSiteExplorer.org: Open Site Explorer is another tool to discover links linking to your website provided by MOZ.com. Using this tool, you can compare up to 5 sites to compare to your competitor sites. You can explore inbound links, Top pages, Anchor text and other more features. To overcome the daily limits you have to register and log in using MOZ account.

# 3) Ahrefs.com: It provides more detailed report in the free service also provides paid service for more features. On the main window, it provides URL Rank, Ahrefs Domain Rank, Total number of backlinks and referring domains. It also provides total referring pages, total referring domains and new and lost backlinks on chart.

# 4) RankSignals.com: It is free to use backlink checker tool to discover SEO links and traffic sources of your website and your competitors. It provides the list of title and URL of linking page, link anchor text and its page rank.

# 5) Backlinkwatch.com: It also a free tool to get complete detailed information about quality and quantity of backlinks pointing to your website. You can find anchor text, page rank, total outbound links on the page along with no-follow tag for no-follow links.

# 6) SmallSeoTools.com: Backlink checker tool of Small SEO Tools provides total number of backlinks, page URL that contain your website's links, website PR, Page PR, Anchor text and flag used in link with 10 results at a time.

# 7) MonitorBacklinks.com: It also provides free as well as paid service for advanced options. You can find out total backlinks, unique domain, unique IPs, number of no-follow links, .edu and .gov links. If your registered for this site, can monitor up to 2 domains and manage up to 500 links.

# 8) Digibacklink.com: It is a free to use website backlink checker tool, which provides total number of backlinks along with link flag, target, page rank and Moz Rank. You can see more back-links up to 1000, if connected using Facebook.



# 9) AnalyzeBacklinks.com: By using this backlink checker tool, you can find out linked URLs, Anchor text, total links, outbound links, title of the page and text found on the link.

# 10) LinkDiagnosis.com: It is a free tool to check backlinks for your website. It uses SEO Moz engine to analyze and generate reports.

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Best Online Sitemap Generators List

Sitemap is a most important part of any website or blog. A Sitemap is an XML file that lists URLs for a site along with additional metadata about each URL when it was last updated, how often it usually changes, and how important it is, relative to other URLs in the site, so that search engines can more intelligently crawl the site. Sitemap makes any website more SEO friendly and helps to index on search engines easily and also helps the visitors to find out the contents on the website. Here are some list of best online sitemap generator tools along with their descriptions, you can use up them to create, place on your website or blog and to submit on search engines like Google, Yahoo, Bing, Ask, AOL etc

List of Online Sitemap Generators 

1. xml-sitemaps.com: It is one of the best online sitemap generator tool. It provides free as well as paid or pro service for sitemap creation. By using a free service maximum 500 pages will be indexed in sitemap. Along with XML sitemap, you can create text and HTML sitemaps for the list of webpage on your website.

2. web-site-map.com: It is best free to use online sitemap generator tool. You can index up to 3500+ pages on sitemap file. After generating XML sitemap, you can validate by using W3C Markup Validation Service. If you want the free tool for sitemap generation I recommended this site.

3. sitemapdoc.com: Sitemapdoc.com is the another site for generating different formats of sitemaps. You can create XML sitemap, Text sitemap, HTML sitemap and RSS feed. You can check for the image and check website for viruses using AVG, Norton, McAfee, Google etc.

4. addme.com: Here you can generate the sitemap with providing your website URL, Frequency, Priority, Last date modified, Name and Email address. After generating sitemap it will be emailed to you on the given email address.

5. freesitemapgenerator.com: By using this tool you can index up to 5000 pages on sitemap. After successfully generating the XML sitemap, can download the compressed folder. To generate sitemap you have to create an account first.

6. auditmypc.com: It is also the free tool to generate XML sitemaps. You can provide different filters, rules and options while generating sitemap files. You can include or exclude URLs and contents as filter.

7. xmlsitemapgenerator.org: Using this tool you can easily create HTML, RSS and XML Sitemaps online for free. Sitemap generated by this tool is Compatible with major search engines including Google and Bing. Sitemaps tell search engines when and how often pages are updated, and their relative importance.

8. sitemaps-builder.com:  Using this free tool for generating sitemap maximum 1000 pages will be indexed at the Site. After successfully generated you have to download the sitemap file at results page and upload it to the root directory your website.

9. sitemapxml.net: After Simply entering your website URL, selecting the frequency of website change and providing the last modified date, this free tool generates sitemaps in XML, ROR and TEXT format that can be instantly submitted to Search engines such as Google, Yahoo and MSN.

10. xsitemap.com: After just providing website URL, Last modified date, Change frequency and Priority, XML sitemap can be created after few minutes. After successfully generated you have to download the sitemap file and upload it to the root directory your website.

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How to Display Date Format in JavaScript?

You can display different date format using Date object in JavaScript for your webpage or web application.The different date format may be year only (YYYY), year and month (YYYY-MM), complete date (YYYY-MM-DD), complete day with day name (YYYY-MM-DD DayName) and date with different time format. Different methods are available in date object to manipulate date in JavaScript. The Date object automatically hold the current date and time as its initial value. You can extract Year, Month, Day along with Hours, Minutes and Seconds from it. Here I have given very simple codes for printing different date formats, you can use respective codes for displaying that format of date on your web page.

JavaScript Date Format YYYY (year only)

<script type="text/javascript">
function displayDate(){
var now = new Date();
var year=now.getFullYear();
date.innerHTML=year
}
window.onload=displayDate;
</script>
<div id="date"></div>

It prints Year only. i.e. 2014

JavaScript Date Format YYYY-MM or MM-YYYY (year and month) 

<script type="text/javascript">
function displayDate(){
var now = new Date();
var month=now.getMonth();
var monthName=new Array(12)
 monthName[0]="January";
 monthName[1]="February";
 monthName[2]="March";
 monthName[3]="April";
 monthName[4]="May";
 monthName[5]="June";
 monthName[6]="July";
 monthName[7]="August";
 monthName[8]="September";
 monthName[9]="October";
 monthName[10]="November";
 monthName[11]="December";
var year=now.getFullYear(); 
date.innerHTML=monthName[month]+",  "+year
}
window.onload=displayDate;
</script>
<div id="date"></div>

It prints Year and Month. i.e. February, 2014

JavaScript Date Format YYYY-MM-DD (complete date)

<script type="text/javascript">
function displayDate(){
var now = new Date();
var today=now.getDate();
var month=now.getMonth();
var monthName=new Array(12)
 monthName[0]="January";
 monthName[1]="February";
 monthName[2]="March";
 monthName[3]="April";
 monthName[4]="May";
 monthName[5]="June";
 monthName[6]="July";
 monthName[7]="August";
 monthName[8]="September";
 monthName[9]="October";
 monthName[10]="November";
 monthName[11]="December";
var year=now.getFullYear();
var day=now.getDay();
date.innerHTML=monthName[month]+today+ ",  "+year
}
window.onload=displayDate;
</script>
<div id="date"></div>

It prints Year, Month and Day. i.e. February21, 2014

JavaScript Date Format YYYY-MM-DD-DayName (date with day name)

<script type="text/javascript">
function displayDate(){
var now = new Date();
var today=now.getDate();
var month=now.getMonth();
var monthName=new Array(12)
 monthName[0]="January";
 monthName[1]="February";
 monthName[2]="March";
 monthName[3]="April";
 monthName[4]="May";
 monthName[5]="June";
 monthName[6]="July";
 monthName[7]="August";
 monthName[8]="September";
 monthName[9]="October";
 monthName[10]="November";
 monthName[11]="December";
var year=now.getFullYear();
var day=now.getDay();
var dayName=new Array(7)
 dayName[0]="Sunday";
 dayName[1]="MOnday";
 dayName[2]="Tuesday";
 dayName[3]="Wednesday";
 dayName[4]="Thrusday";
 dayName[5]="Friday";
 dayName[6]="Saturday";
date.innerHTML=monthName[month]+today+ ",  "+year+"  "+dayName[day]
}
window.onload=displayDate;
</script>
<div id="date"></div>

It prints Year, Month and Day with Day Name. i.e. February21, 2014 Friday

JavaScript Date Format YYYY-MM-DD hh:mm (date with hour and minute)

<script type="text/javascript">
function displayDate(){

var now = new Date();
var today=now.getDate();
var month=now.getMonth();
var h=now.getHours()
var m=now.getMinutes()
var s=now.getSeconds()

m=checkTime(m)
s=checkTime(s)

var monthName=new Array(12)
 monthName[0]="January";
 monthName[1]="February";
 monthName[2]="March";
 monthName[3]="April";
 monthName[4]="May";
 monthName[5]="June";
 monthName[6]="July";
 monthName[7]="August";
 monthName[8]="September";
 monthName[9]="October";
 monthName[10]="November";
 monthName[11]="December";
 
var year=now.getFullYear();
var day=now.getDay();

var dayName=new Array(7)
 dayName[0]="Sunday";
 dayName[1]="MOnday";
 dayName[2]="Tuesday";
 dayName[3]="Wednesday";
 dayName[4]="Thrusday";
 dayName[5]="Friday";
 dayName[6]="Saturday";

date.innerHTML=monthName[month]+today+ ",  "+year+"  "+h+":"+m
}
function checkTime(i)
{
if (i<10)
{ i="0" + i}
return i
}
window.onload=displayDate;
</script>
<div id="date"></div>

It prints Year, Month and Day with Hour and Minute. i.e. February21, 2014 9:18

To include other time formats refer to the previous post: How to Create a Digital Clock in JavaScript?

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