COA - Question Paper Computer System Architecture (MC121):...

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Unformatted text preview: Question Paper Computer System Architecture (MC121): January 2009 Section A : Basic Concepts (30 Marks) This section consists of questions with serial number 1 - 30. Answer all questions. Each question carries one mark. Maximum time for answering Section A is 30 Minutes. 1. Which of the following computers is the first digital computer and the first computer to be commercially available in the marketplace? (a) ENIAC (b) UNIVAC (c) EDVAC (d) EDSAC ASCC. 2. Which of the following selects, interprets and ensures the proper execution of the program instructions? (a) Arithmetic logic unit (b) Interpreter (c) Assembler (d) Control unit Compiler. 3. Which of the following generation of computers are based on artificial intelligence and possess voice recognition capabilities? (a) First (b) Second (c) Third (d) Fourth Fifth. 4. Which of the following is correct with respect to Access Speed? (a) RAM>Hard disk>CD-ROM> Cache memory (b) RAM>Hard disk>Cache memory>CD-ROM (c) Cache memory>Hard disk>RAM>CD-ROM (d) Cache memory >CD-ROM>RAM>Hard disk Cache memory>RAM>Hard disk>CD-ROM. 5. What is the decimal value of the octal fraction (0.325) 8 ? (a) 0.416015 (b) 0.436015 (c) 0.456015 (d) 0.476015 0.426015. 6. The sum of two hexadecimal numbers DF and AC is (a) 18B (b) 17A (c) 18C (d) 17B 18D. 7. Which of the following codes is/are example(s) for unweighted codes? I. BCD. II. Gray code. III. Excess-3 code. (a) Only (II) above (b) Both (I) and (II) above (c) Both (I) and (III) above (d) Both (II) and (III) above All (I), (II) and (III) above. 8. What is the Gray code for the binary number 10110? (a) 11101 (b) 11110 (c) 10101 (d) 11011 11001. 9. Hamming error- correction code uses a number of parity bits (dependent on the number of information bits) located at certain positions in the code group. The number of parity bits required to provide single-error correction for four information bits is (a) 1 (b) 2 (c) 3 (d) 4 5. 10. In a Johnson counter, the complement of the output of the last flip-flop is connected back to the D input of the first flip-flop. 5-bit Johnson counter will produce (a) 5 stages (b) 4 stages (c) 10 stages (d) 31 stages 32 stages. 11. Which of the following statements is /are true about SRAM? I. SRAM is more expensive than DRAM. II. SRAM needs to be refreshed thousand of times per second. III. Compare to DRAM, SRAM is more commonly used. (a) Only (I) above (b) Only (II) above (c) Both (I) and (II) above (d) Both (II) and (III) above All (I), (II) and (III) above. 12. Mr. Sudhakar is working on 8085 microprocessor and is using 16 bit address to access the data from the main memory. From the above statement, we can say that (a) The size of the RAM is 64K (b) The size of the RAM is 32K (c) The size of the RAM is 1MB (d) The size of the RAM is 1GB The size of the RAM is 128K....
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COA - Question Paper Computer System Architecture (MC121):...

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