ANSWER KEY - VMOU, Kota

VARDHAMAN MAHAVEER OPEN UNIVERSITY, KOTA, RAJASTHANTheory Question paper for the position of Programme OfficerANSWER KEYDuration = 1 HourMax Marks: 100Note: All questions are compulsory. For multiple choice or True/False type questions, there is one rightanswer among the choices provided. Please encircle the correct answer. Attempt all the questions onthe question paper itself. All questions carry equal marks. There is no negative marking.Correct answers are highlighted in yellow colour.------------------------------------------------------------------------------------------------------------------Question - 1_____________ are networks that connect people within an institution to each otherand to the institution network.a) Extranetsb) Internetsc) Intranets answerd) BitstreamsQuestion - 2FSFM stands for:a) Full Screen Full Motion Video answerb) Final Screen Full Motion Videoc) Full Screen Final Motionsd) None of the aboveQuestion - 3When preparing a website, designers should ensure that the site makes effective useof the text, pictures and video. This design feature is known as _________.a) contextb) content answerc) communicationd) connectionQuestion - 4 Write the following abbreviations in their full form:a) WWW: World Wide Webb) FTP: File Transfer Protocolc) JPEG: Joint Photographic Experts Groupd) AVI: Audio Video Interleave

Question - 5 Mass communication is the industrialized production and multiple distribution ofmessages through technological devices.a) Trueb) FalseQuestion - 6 In journalism, a hoax means specifically that a storya) is based in fact but has not been properly researchedb) was selected with the goal of selling newspapersc) is a purposeful deception of the reading publicd) is full of wit and humorQuestion - 7The main difference between the Internet and other forms of mass media is thata) messages are sent from one source to many receivers.b) receivers of messages can also send their own messages.c) it has changed the environment for other media.d) it uses digital technology.Question - 8 What is aspect ratio?a) Lighting on the stageb) Volume of speakersc) Ratio of technicians and non-technicians in the studiod) The width to height ratio of the video imageQuestion - 9 Which of the following is not a unit for data transfer rate?a) Mbpsb) Kbpsc) Lbpsd) GbpsQuestion -10___________ audio/video refers to the broadcasting of radio and TV programsthrough the Internet.a) Interactiveb) Streaming livec) Streaming storedd) none of the above

Question - In a real-time video conference, data from the server is _______ to the client sites.11a) unicastb) multicastc) broadcastd) none of the aboveQuestion -12A _______ changes the format of a high-bandwidth video signal to a lower qualitynarrow-bandwidth signal.a) Timestampb) Sequence numberc) Translatord) Programme DirectorQuestion - From which of the following, colour encoding uses during the transmission13a) Red, Green and Blue signalsb) Two luminance signals and one chrominance signalc) VIBGYOR patternd) One luminance and two chrominance signalsQuestion - What do we do to avoid Flicker effect:14a) increase the pixel resolutionb) increase the refresh cycles per secondc) increase the memory in the display refresh bufferd) keep the video camera in refrigerator to cool it downQuestion - HDTV differs from NTSC video signal because of15a) different number of lines onlyb) different frame rate and aspect ratio onlyc) different number of lines, frame rate and aspect ratiod) different wattage of picture tube of television

Question -16Answer:What is an open source software? Give two examples.Open Source software refers to software in which source code is freely available forothers to view, amend and adapt. Examples: Linux, an open source operating system;MOODLE, an open source learning management system; OpenOffice, an officeproductivity software suiteQuestion -17Answer:What are various types of networking switches?Managed SwitchUnmanaged SwitchSmart SwitchQuestion -18Answer:What is difference between raster and vector graphics? Give examples of their filetypes.A Raster graphic is an image made up of rows and columns of picture elements,better known as pixels. Each pixel stores one or more bits of data describing the colorat that location within the image. The file size of raster graphics is large, and theydonot scale well. Raster graphics are also known as bitmap images. Examples: BMP,GIF, JPEG, TIFF PSD, PNGA vector graphic is a graphic that is composed of lines and curves defined bymathematical equations. Objects we draw in Flash are created as vector graphics.They are resolution independent, and so can be resized without distortion. When weedit vector graphics, we actually modify the properties of the lines and curves thatcompose the image. Example: EPS, Adobe Illustrator (AI), DWG (AutoCAD drawing),FH9 or FH10.Question -19Answer:Explain for what kind of application MPEG-2 is suitable and for what kind ofapplications MPEG-2 is not suitable.MPEG-2 is suitable for retrieval applications, where videos are stored/compressedahead of time. The decompression during retrieval is fast.MPEG-2 is not suitable for conversational applications.

Question -20Answer:Explain the difference between JPEG and MPEG-1 compression.JPEG is image compression algorithm, MPEG-1 is video compression.JPEG applies to any size of image, MPEG-1 applies only to selected set of sizes.