Computer Basic 151 DCT

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Bangladesh Open University Diploma in Computer Science and Application Program 151 Term(1st Semester) Examination- For 2015 Session Course: Computer Basic (DCSA 1301) Essay Type Questions Time: 2 Hrs.40 Minutes Full marks: 50 (N.B.-The figures in the margin indicate full marks.) Section A: Short Question Answer any EIGHT of the following questions. 1. What is computer? Mention the basic difference between system software and application software. 2. Write the elaboration of the following: i) WWW ii)USB iii) UPS iv) OMR v) ROM. 3. Write the function of the following keys: i) Numeric keys ii) Control keys iii) Shift keys iv) Function keys v) arrow keys. 4. What is bus? What is the difference between serial and parallel interfaces? 5. Differentiate between volatile and non volatile memory. 6. What is the function of web browser? 7. What does following command do in MS DOS? i) MD ii) cls iii) dir/w iv) ver v) rmdir 8. Write the feature of word processing package. 9. What is e-mail? Write the advantages of e-mail. 10. Write the advantages of computer method of data processing over manual and mechanical methods of data processing. 2.5x8=20 1+1.5 2.5 2.5 1+1.5 2.5 2.5 2.5 - 2.5 1+1.5 2.5 Section B: Analytical Questions Answer any FIVE of the following question 1. Outline the major landmarks of the fourth and fifth generation computer. 2. "Hardware is unless without software". Explain. 3. Describe the elements of computer system. 4. What do you mean by data, information and code? Write BCD representation fo 469. 5. List the steps of software development cycle and briefly explain each step. 6. i) What is computer virus?. ii) How would you prevent virus attack? Briefly explain. 7. Write short note on-i) cache memory ii) pen drive. 8. Discuss the characteristics of windows and Unix operating system. 5x6=30 6 6 6 4+2 6 2+4 - 3+3 6

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