JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II DIGITAL LOGIC DESIGN AND COMPUTER ORGANIZATION Previous Question Paper (May/June - 2019 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Explain about Supercomputers and Grid computers.
Answer
Supercomputers are high-performance computing systems designed for complex, computationally intensive tasks such as weather forecasting, molecular modeling, and nuclear simulations. They utilize massive parallel processing architectures to achieve extremely high speeds measured in FLOPS.
Grid computers involve a distributed architecture where multiple geographically dispersed, heterogeneous computers are interconnected via a network to work together as a single virtual supercomputer. This approach enables resource sharing, such as processing power and storage, to solve large-scale problems that exceed the capacity of a single machine.
Convert the number from (102)6 to ( --)8.
Answer
To convert the number (102)6 to base 8, first convert it to decimal (base 10) and then to octal (base 8).
Step 1: Convert (102)6 to decimal:
Step 2: Convert 3810 to octal by repeated division by 8:
- 38 ÷ 8 = 4 with a remainder of 6
- 4 ÷ 8 = 0 with a remainder of 4
Reading the remainders from bottom to top, we get (46)8.
Draw the JK Flip-flop circuit and write truth table of it.
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Explain about multiplexers with a neat sketch.
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Explain about byte addressability.
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Explain about memory operations.
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Explain about the basic structure for data processing.
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Explain about Flash memory.
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What is Vectored Interrupt?
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Explain about PCI bus.
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Unit I
Explain about the performance evaluation of computers.
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Compare signed and unsigned binary numbers with table.
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Convert the following pairs of decimal numbers to 5-bit 2’s-complement numbers, then perform addition and subtraction on each pair. Indicate whether or not overflow occurs for each case: i) 7 and 13 ii) -12 and 9
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Explain about Floating-Point Representation with an example.
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Unit II
Simplify the following Boolean function F , together with the don’t-care conditions d , and then express the simplified function in sum-of-min terms form. F(x,y,z)= Σ(0, 1, 4, 5, 6) d(x,y,z)=Σ(2, 3, 7)
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Explain about Shift Registers with an example.
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Design a combinational circuit that compares two 4-bit numbers to check if they are equal. The circuit output is equal to 1 if the two numbers are equal and 0 otherwise.
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Explain about ripple counter and ring counters.
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Unit III
Derive an algorithm in flowchart form for adding and subtracting two fixed-point binary numbers when negative numbers are in signed-1's complement representation.
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Design a Floating-point addition-subtraction unit.
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Discuss about Instructions and Instruction Sequencing.
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Explain about different types of Instruction Formats.
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Unit IV
Explain about multiple bus organization with a neat sketch.
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Explain about Microprogrammed control unit organization.
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Explain about the internal organization of memory chips in detail.
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Discuss about different mapping techniques used in cache memory.
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Unit V
Discuss about accessing I/O devices.
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Explain about interrupt hardware and enabling and disabling interrupts.
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Explain about DMA interface.
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Explain about input interface circuit.
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