Questions on Computer Basics and Software

No. of Printed Pages : 4 BACHELOR IN COMPUTER APPLICATIONS (BCA Revised) Term-End Examination cV 00 June, 2012 BCS-011 BCS-011 : COMPUTER BASICS AND P C SOFTWARE Time : 3 hours Maximum Marks : 100 Weightage : 75% Note : Question number 1 is compulsory and carries 40 marks. Attempt any three questions from the rest. (a) Convert the following hexadecimal number to equivalent binary and decimal : (i) (ii) (b) (51)16 (DA)16 5 4 1. How is the access time on a disk is defined ? Explain each of the component of access time with the help of an example. Explain the basic structure of a computer system ? With the help of a diagram .A personal computer has a component called motherboard. How is motherboard related to the basic computer structure ? (c) 6 BCS-011 1 P. T. O. List five facilities that are provided by an operating system to a user or to a program. Draw a flow chart to add integer between 2 to (n+1) where n>2. Explain the terms : Subroutine and function with the help of an example. C onsider two IP addresses 160. 10. 11. 25 160. 10. 12. 35 Do they belong to the same network , if (i) The subnet mask is 255. 255. 0. 0 (ii) The subnet mask is 255. 255. 255. 0 Justify your answer. (h) What is a Wide Area Network (WAN) ? What are the characteristics of WAN ?How are they different from LANs ? Is Internet a WAN ? Justify your answer. What is the need of memory hierarchy in a computer system ? Explain with the help of various trade offs like cost, speed, size etc. What is perverse software ? List various types of perverse software. Give four ways to counter perverse software. What are cookies in the context of Browser software ? Are cookies bad ? Explain. List four precautions for safe browsing. BCS-011 2 7 6 8 6 3. (a) Compare and contrast the characteristics of the following : (i) (ii) (b) Dot matrix printer versus Laser printer Cathode ray tube monitors versus liquid crystal display monitors. (c) â€Å"Latest word processor have text 8 manipulation functions that ex tend beyond a basic ability to enter and change text † . Explain any four of these advanced text manipulation functions. 6 Explain the characteristics of the following data transmission channels : (i) (ii) Optic fiber cables Radio waves (iii) Infrared 4. (a) List six activities that should be part of an e-learning system. Explain the phases of content development in e-learning. (b) Compare and contrast the following : (i) (ii) SRAM versus DRAM SIMM versus DIMM 6 8 (iii) ROM versus PROM (iv) CD-ROM versus Pen – drive. c) What is Open Source Software ? What are the main features of open source development model ? BCS-011 3 6 P. T. O. 5. Explain any five of the following with the help of an example/diagram, if needed. (i) (ii) The uses of WIKI in collaboration. The activities/actions performed by a search engine. 20 (iii) TCP/IP model. (iv) (v) (vi) Activities in a project management software. Batch systems and time sharing operating systems. Different types of parts in a computer. (vii) Concept of Instruction ; and motivation for development of UNICODE. BCS-011 4