IT1404 Internet and World Wide Web Multiple Choice Question Paper

Transcription

1 UNIVERSITY OF COLOMBO, SRI LANKA UNIVERSITY OF COLOMBO SCHOOL OF COMPUTING DEGREE OF BACHELOR OF INFORMATION TECHNOLOGY (EXTERNAL) Academic Year 2009/ st Year Examination Semester 1 IT1404 Internet and World Wide Web Multiple Choice Question Paper 07 th March, 2010 (TWO HOURS) Important Instructions : The duration of the paper is 2 (two) hours. The medium of instruction and questions is English. The paper has 50 questions and 13 pages. All questions are of the MCQ (Multiple Choice Questions) type. All questions should be answered. Each question will have 5 (five) choices with one or more correct answers. All questions will carry equal marks. There will be a penalty for incorrect responses to discourage guessing. The mark given for a question will vary from 0 to +1 (All the correct choices are marked & no incorrect choices are marked). Answers should be marked on the special answer sheet provided. Note that questions appear on both sides of the paper. If a page is not printed, please inform the supervisor immediately. Mark the correct choices on the question paper first and then transfer them to the given answer sheet which will be machine marked. Please completely read and follow the instructions given on the other side of the answer sheet before you shade your correct choices. 1

2 1. Internet (a) is an open global network of interconnected computer networks which use a common communication protocol, TCP/IP. (b) is becoming more and more safe and important for children. (c) always provides a secure and reliable way of transaction. (d) has become an important tool that enables communication among members of society. (e) always contains precise, reliable information. 2. Which of the following is(are) not broadband internet connections? 3. Fill in the blank. (a) DSL (b) IPTV (c) Leased lines (d) Cable Internet (e) Dial-Up... is a high speed Internet connection that uses the normal phone wires with special modems at either end. With this connection one can connect his computer to the Internet and talk on the phone at the same time on the same phone line. (a) WiMAX (b) Dial-Up (c) Leased line (d) DSL (e) Cable Internet 4. A Uniform Resource Locator (URL) tells the browser the (a) transfer protocol to use when transporting a resource. (b) domain name of the computer on which the resource resides. (c) path name of the folder/directory on the computer on which the resource resides. (d) name of the resource to be retrieved. (e) IP address of the computer on which the resource resides. 5. Which of the following methods will work in getting the IP address of a computer connected to the Internet running on a Windows operating system? (a) Typing the Ipconfig at command prompt (b) Typing the ping command at command prompt (c) Properties of Internet protocol, lists the IP address (d) Getting the IP address of any other computer connected to the same network (e) Referring to the IP address found last time as it is always the same 6. Web 2.0 is commonly associated with web applications which facilitate interactive information sharing, interoperability, user-centered design and collaboration on the World Wide Web. Which of the following is (are) included in Web 2.0? (a) Social networking sites (b) Wikis (c) Blogs (d) Mashups (e) Video sharing sites 7. Identify mailing list servers from among the following. (a) Listserv (b) Listproc (c) ebay (d) Addressbook (e) Google groups 2

3 8. Consider the following scenario. A uses Thunderbird as the client and B uses Eudora as the client. Which of the following statements is(are) correct in relation to the above scenario? 9. Match column X with Y. (a) messages sent by A can be received by B. (b) messages sent by B can be received by A. (c) A or B cannot receive messages sent by other clients. (d) A can never receive messages sent by B but B can receive messages sent by A. (e) B can never receive messages sent by A, but A can receive messages sent by B. Column X Column Y i IMAP Protocol A used by the Mail Transfer Agent (MTA) to deliver to the recipient's mail server ii POP3 Protocol B is not a protocol dedicated for communications, but it can be used for accessing your mailbox iii SMTP Protocol C is a client/server protocol in which is received and held for you by your Internet server iv HTTP Protocol D used to download messages from the mail server to a local computer (a) i -A, ii -B, iii -C, iv-d (c) i- B, ii -C, iii -D, iv-a (e) i -C, ii -B, iii -A, iv-d (b) (i) -D, ii -C, iii -B, iv-a (d) (i) -C, ii -D, iii -A, iv-b 10. Consider the following statements with regard to Multipurpose Internet Mail Extensions (MIME). i MIME adds multi-media extensions to the existing system by changing the SMTP protocol. ii MIME is also used for information exchange between web browsers and web servers. iii MMIME redefines the format of messages to allow for multi-part message bodies. Which of the above Statements is /are correct? (a) i only. (b) ii only. (c) i and ii only. (d) ii and iii only. (e) All. 11. Consider the following statements related to Blind Carbon Copy (BCC) feature available in an client. i An address in the BCC field is visible to recipients in CC field. ii Addresses in the BCC field are not displayed on incoming messages. iii If there are no valid address in the To or CC field, then some programs will indicate a notation like "Recipient list suppressed" in the To field, which tells the recipient that there is at least one BCC address. Which of the above statements is (are) correct? (a) i only. (c) i and iii only. (e) All (b) ii only. (d) ii, and iii only. 3

4 12. Consider the following scenario and the statements. Scenario: An user observed that the time in his computer is correct, but when he sends , the timestamp in his is an hour ahead. Statements: i. The "one hour off" is actually a clue that his time zone is set incorrectly. ii. The change of time stamp depends on what program or service is being used. iii. The Selection of the correct "time zone" is not one of the reasons for this situation experienced by the user. Identify the correct statements from above with regard to the above scenario. (a) i only. (b) ii and iii only. (c) i and iii only. (d) i and ii only. (e) All. 13. Identify the correct statement(s) related to Pull and Push technologies in . (a) Pull technology requires the user to actively go and retrieve the information. (b) Push technology delivers information to the user and hence user has only to receive it. (c) One of the reasons has been a success is because it is a Pull technology. (d) An advantage of Push technologies is the ease of use, they require a minimum of effort on the part of the recipient. (e) Push technology is used when surfing the World Wide Web to seek out and download information. 14. Select correct statement(s) related to . (a) Any file type can be sent as an attachment. (b) The recipient should have an MS Excel program to receive an MS Excel file as an attachment. (c) To send and receive attachments, both the sender and the receiver must use the same operating system. (d) Uuencode can be used to encode attachments. (e) Only the encoding programs which are known to the mail servers can be used to encode attachments. 15. Consider the following statements given below with regard to filtering of . i One of the most common uses of filters is automatic transfer of incoming into different mailboxes. ii Messages from individuals/groups can be directed into a special folder using e- mail filters. iii One can set up his own set of rules to create an application level spam blocker. Which of the above statements is (are) correct? (a) i only. (b) i and ii only. (c) i and iii only (d) ii and iii only (e) All 4

5 16. Hyperlink is 17. HTML documents (a) an image which connects to another web page. (b) a piece of text that connects to another part of the same document. (c) used in defining the internet. (d) used to format text. (e) a tag used to play background sound. (a) describe web pages. (b) contain HTML tags and plain text. (c) are called web pages (d) contain 3D definitions. (e) are used for server side scripting. 18 Which of the following statements is/are correct in relation to <pre> tag used in HTML? (a) Text inside this tag is displayed in a fixed-width font and preserves both spaces and line breaks. (b) It displays the text in size 12 font. (c) It displays the text in size 24 font. (d) Default font for this tag is Courier. (e) Default font for this tag is Arial. 19. Identify the correct statement(s) about URI s and URL s. (a) URL is a deprecated element as per the w3c definition. (b) URI means Universal Resource Identifier. (c) URL is a subset of URI. (d) URI is a subset of URL. (e) URI specifies the server name or IP address. 20. Select the set(s) of tags which contains invalid core attributes of HTML. (a) meta, param, pre, bold (c) style, title, meta, param (e) subscript, font, img, head (b) head, base, html, script (d) pre, form, bold, superscript 21. Which of the following can be used to edit HTML? (a) gedit (b) Emacs (c) Ogre (d) Unreal Engine (e) Vi 22. Find the correct set(s) of words which contain(s) only search engines? (a) Ask, Google, Yahoo, Hotmail (c) Ask, Yahoo, Google, Cricinfo (e) Java Search, Google, Hotmail, Yahoo (b) Hotmail, Yahoo, Gmail, Ogre (d) MSN, Google, Ask, Yahoo 5

6 23. Identify the search engine techniques from among the following. (a) Crawler based systems (c) Ray tracing based techniques (e) Acyclic searching techniques (b) Human powered directories (d) Collision based techniques 24. Which of the following is(are) true about spider based searching? (a) Spiders initially read the content after visiting a site. (b) After reading the content, spiders move through the site by using the links. (c) Spidered sites are often revisited after an elapse of a specified time period. (d) This is not a web search technique. (e) Spiders are mechanical devices which crawl servers physically. 25. Select the correct statement(s) related to web directories and search engines. (a) Web directories use a different approach from search engines to build useful indexes of information on the web. (b) One of the oldest directories on the web is Yahoo!. (c) A search engine differs form a web directory as it is already selected and organized into categories. (d) Web directory is a listing of hyperlinks to web pages which is organized into hierarchical categories. (e) In a web directory, the database is searched in response to a visitors query. 26. Consider the part of the web page given below. Which of the following is(are) indicated by the small padlock that appears at the right edge of the status bar in above? (a) Web page is blocked by the network administrator (b) Not authorized to access the information on the web site (c) Web site is authenticated properly and the communication is secure (d) Cannot upload to the web site (e) Cannot download from the web site 6

7 27. Consider the following HTML page. Select the most compact HTML code snippet from among the following to depict the above output. (a) <html> <h1> Hello World!<h1> / </html> (c) <html> <title> Internet and WWW </title> <h1> Hello World!</h1> </html> (b) <html> <head> Internet and WWW </head> </html> (d) <html> <head> <title> Internet and WWW </title> </head> <h1> Hello World!</h1> </html> (e) There is no HTML code that is capable of deriving the above output. 28. Consider the following output. Which of the following HTML code snippets would give the output shown above? (a) < html > Can you do this? < /html > (c) < html < Can you do this? < /html < (e) < html > < body> Can you do this? < /html > (b) > html > Can you do this? > /html > (d) > html < Can you do this? > /html < 7

8 29. Consider the following HTML code. <dl> <dt>coffee</dt> <dd>black hot drink</dd> <dt>milk</dt> <dd>white cold drink</dd> </dl> What is the correct output of the above HTML code snippet when run on a browser? (a) Coffee Black hot drink Milk White cold drink (c) Coffee Black hot drink Milk White cold drink (b) Coffee Black hot drink Milk White cold drink (d) Coffee Black hot drink Milk White cold drink (e) Coffee Black hot drink Milk White cold drink 30. Consider the HTML code given below. <head> </head> <style type="text/css"> body {background-color: red} p {margin-left: 20px} </style> The Cascading Style Sheet defined in the above code snippet is defined as (a) external to the document. (c) an inline style. (e) a graphical style. (b) internal to the document. (d) an abstract linear style. 31. How can an HTML developer create a link such that it opens in a new browser window? (a) <a href="url" target="_blank"> (c) <a href="url" target="_new"> (e) <a href="url" target="_parent"> (b) <a href="url" new> (d) <a href="url" target="_self"> 32. Consider the following statement. Input fields are predominantly used in web forms. Select the set(s) which contain(s) valid names for the type of the input field. (a) text, submit, radio, dropdown (c) text, radio, textbox, reset (e) radiobutton, textarea, dropdown, combo (b) checkbox, reset, submit, text (d) combo, reset, submit, text 8

9 33. Match column X with Y. Column X Column Y A IPTV i Wireless transmission of data using a variety of transmission modes B WiMAX ii Software system that allows one to control a remote computer C ipod iii A family of popular digital music players from Apple D VNC iv Digital television service delivered using Internet Protocol (a) A- i, B- iv, C- iii, D- ii (c) A- i, B- iii, C- ii-, D- iv (e) A- iv, B- i, C- iii, D- ii (b) A- iv, B- ii, C- iii, D- i (d) A- i, B- ii, C- iii, D- iv 34. Consider the following questions asked by a novice FTP user and the answers he got. (i) Ques: Is FTP independent of the operating system? Ans: Yes (ii) Ques: Is it important to scan the files downloaded from the FTP sites? Ans: No (iii) Ques: Can one use a web browser to upload and download files from FTP sites? Ans: Yes (iv) Ques: Is there a customary password to log on to a publicly accessible FTP site? Ans: Yes Identify Question numbers for which he has got correct answers (a) (i) and (ii) only (b) (i) and (iii) only (c) (ii) and (iii) only (d) (i), (iii) and (iv) only. (e) (ii), (iii) and (iv) only. 35. Consider the following scenario. An ecommerce web sites use the SSL protocol in handling sensitive information as it travels over the Internet. Also, they store their customer information so that customers do not have to type the card numbers every time they buy something from the web site. Which of the following statements is(are) correct in relation to the above scenario? (a) Using SSL protocol protects sensitive information. (b) Instead of SSL protocol, HTTP protocol should have been used. (c) Buyers privacy will not be violated. (d) Storing customer information is always beneficial. (e) This web site can always be trusted as it uses the SSL protocol. 9

10 36. Consider the following statements. (i) (ii) (iii) RSS is a file containing summaries of stories and news from the web. RSS differs from newsgroups in the way the content is delivered to the subscriber. Newsgroups are technically distinct from, but functionally similar to, discussion forums on the World Wide Web. Which of the above statements is (are) correct? (a) (ii) only. (b) (i) and (ii) only (c) (ii) and (iii) only (d) (i) and (iii) only. (e) ALL. 37. In using passwords on the Internet, (a) common words spelt backwards are good passwords. (b) gluing few words together makes good passwords. (c) write down the passwords to avoid difficulties. (d) better to have different passwords for each kind of account. (e) avoid using English words or common names. 38. Identify the correct statements related to sound and music on the web. 39. Match column x with y. (a) Music stored in WAV file format would be in lower quality than in MP3 file format. (b) MIDI files are smaller in size than WAV files. (c) MIDI files are often used in the web. (d) A CD that might hold 15 songs in WAV format could instead hold 150 songs in MP3 format. (e) MP3 file sharing activity is unethical because it deprives the creators of the audio works. Column X Column Y A PBWorks i Location to download and develop free open source software B SourceForge ii Shared workspaces for working with colleges, clients and partners C Drupal iii Open source content management platform D Blogger iv Share your thoughts, photos and more with your friends and the world (a) A- i, B- iv, C- iii, D- ii (c) A- ii, B- iii, C- i-, D- iv (e) A- iv, B- i, C- iii, D- ii (b) A- ii, B- i, C- iii, D- iv (d) A- i, B- ii, C- iii, D- iv 40. Select the correct statements related to online social networks. (a) Social networks rely on advertising to generate the revenue they need to operate the site. (b) Social networks allow creating blogs and posting pictures.. (c) One can post and download digital music files from social networks. (d) Flickr is an online photo management and sharing application in the world. (e) LinkedIn is an online social network. 10

11 41. elearning is moving towards (a) richer content able to provide more authentic learning environments. (b) SCORM to standardize the effort. (c) formalizing the process of content creation and maintenance. (d) minimizing simulation in the content. (e) sufficiently sophisticated feedback mechanisms. 42. Identify the free online library resources among the following. (a) The WWW virtual library (c) Public Library Of Science (e) Encyclopaedia Britannica (b) Wikipedia (d) Internet Public Library 43. Consider the following diagram. X In the above diagram, X is used for filter the information. What can X be? (a) Modem (b) Firewall (c) Router (d) Repeater (e) Gateway 44. Consider the following incomplete paragraph. In the (A). the same key is used to encrypt and decrypt the data. This is similar to using the same key to lock and unlock a door lock. In contrast,..(b).. uses two keys, one key as the..(c).. or the public key and the other key as the..(d) or the private key. This method is more practical compared to the first method. Fill in the blanks from (A) to (D). (a) (A) public key cryptography, (B) secret key cryptography, (C) decryption key, (D) encryption key (b) (A) secret key cryptography, (B) public key cryptography, (C) decryption key, (D) encryption key (c) (A) secret key cryptography, (B) encryption key (C) public key cryptography (D) decryption key (d) (A) public key cryptography, (B) secret key cryptography, (C) encryption key (D) decryption key (e) (A) public key cryptography, (B) encryption key, (C) secret key cryptography (D) decryption key 11

12 45. Identify the secure protocols from among the following. (a) HTTP (b) SSL (c) SET (d) FTP (e) S-HTTP 46. Read the following descriptions about X, Y and Z. X: It does something harmful to the computer system, but is disguised as something useful. Usually does not make copies of themselves Y: It is a computer program that propagates itself across computers, creating copies of itself in each computer and infecting the entire network. Z : It is a computer program designed to replicate itself by infecting other files or system areas which need a host program to spread to another computer. X, Y Z can be respectively, 47. Consider the following. (a) X: Virus, Y: Worm, Z: Trojan horse. (b) X: Trojan horse, Y : Virus, Z: Worm. (c) X: Worm, Y: Virus, Z: Trojan horse. (d) X: Trojan horse, Y: Worm, Z: Virus. (e) X: Worm, Y: Trojan horse, Z: Virus. i ii iii iv Messages on Social Networking websites Messages posted on message boards addresses in address books Images stored in a computer memory Which of the above can be considered as electronic evidence in a court of law? (a) i, ii, and iii only. (c) ii, iii and iv only. (e) All. (b) i and iv only. (d) i, iii and iv only. 48. Consider the following scenario. In the year 2003, a user of e-bay (an internet auction website) received s supposedly from ebay claiming that the user s account was about to be suspended unless he/she clicked on the provided link and updates/verifies his credit card information that the ebay already had. This led to some people being tricked into thinking they were actually being contacted by ebay and were subsequently going to ebay s site to update their account information. This type of internet scam is known as (a) Money Laundering. (b) Flaming. (c) Spam. (d) Phishing. (e) Stealing. 49. Consider the following statements on the use of web based services. i User leaves an electronic trail from which his/her behaviour could be analysed. ii User leaves no trail or clue since the browser is closed after his web sessions. iii By clearing private data, user can erase his trail completely. Which of the above statements is(are) true? (a) i only. (b) i and ii only. (c) iii only. (d) ii and iii only. (e) None. 12

13 50. Consider the following statements. i ii iii iv Internet Communication is completely secure and any information that is transmitted over the internet is also secure. messages composed in upper case will not be interpreted as shouting if the volume function is muted. Forwarding chain messages is allowed, as is meant for communication and has insignificant cost. Providing addresses of friends, relatives and colleagues to advertise firms is ethical since it will give them an opportunity to know about new products and services. Which of the above statements is/are correct with regard to the ethical and legal behaviour on the Internet? (a) i,ii and iv only (b) i and iv only (c) ii and iv only (d) i and iii only (e) None. ************ 13