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Showing posts with label Computer Architecture Organization questions and answers. Show all posts
Showing posts with label Computer Architecture Organization questions and answers. Show all posts

Saturday, July 2, 2016

Computer Architecture Organization questions and answers

(6) If 1Mbyte is the board memory of a graphics card then the mode, which does not support card, is
On a 14” monitor 1600x400 resolution with 16 million colors On a 17” monitor 1600x400 resolution with 256 colors On a 17” monitor 800x400 resolution with 16 million colors On a 14” monitor 800x800 resolution with 256 colors

7.A CPU is connected with a device that is transferring data byte wise, at the rate of10Kbyte/s. Interrupt overhead = 4μs. The byte transfer time between the device interfaces register and CPU or memory is negligible. The minimum performance gain of operating the device under interrupt mode over operating it under program-controlled mode is
5 15 25 35

8.A CPU that runs at a frequency of 1GHz has a five-stage pipeline. In the first stage of the pipeline, instructions are fetched. A conditional branch instruction computes the target address and evaluation of the condition is done in the third stage of the pipeline. Until the outcome of the conditional branch is known the process does not fetch the new instruction. In this program out of 109 instructions 20% are instruction of conditional branching. What will be the total execution time of the program is each instruction takes one cycle to complete on average?
1.0s 1.1s 1.2s 1.3s

9.The one that does not interrupt a running process is
Scheduler process Power failure A device Timer

10.3 clock cycles are required for register to/from memory transfer. 1 clock cycle is required for Add with both operands in register and 2 clock cycles per word are required for instruction fetch and decode. What are the total number of clock cycles required to execute the program?
35 28 30 24

Friday, July 1, 2016

Computer Architecture Organization

(1) In a computer, whose average memory access time is 20ns has the page fault service time 10Ms. For every 106 memory accesses one page fault is generated. The effective access time for the memory is
10ns 43ns 30ns 25ns

(2) Let T1 be the time taken for a single instruction on a pipelined CPU and T2 be the time take for a single instruction on a non-pipelined but identical CPU. Comparing T1 and T2 we can say that
T1=T2 + the time taken for one instruction fetch cycle T1 T1≤T2 T1≥T2

(3) The number of bits needed for cache indexing is
10 15 5 20

(4) The number of tag bits needed is
17 20 22 25

(5) A and B are the data inputs and Y is the control input of a multiplexer. When Y = 0 data input A is selected and when Y = 1 data input B is selected. The connections required to realize the 2-variable Boolean function f = X+Z, without using any additional hardware are
X to A, 0 to B, Z to Y Z to A, 1 to B, 0 to Y Z to A, 1 to B, X to Y X to A, 1 to B, Z to Y