Engineering Answers

A DMA controller transfers 32 bit words to memory using cycle stealing. The words are assembled from a device that transmits characters at a rate of 2400 characters per second. Each character is 8 bit length. The CPU is fetching and executing instructions at an average rate of 1 million instructions per second. By how much will the CPU be slowed down because of the DMA transfer?

How many characters per second can be transmitted over a 1200-baud line in each of the following modes? (Assume a character code of eight bits.)

a. Synchronous serial transmission.

b. Asynchronous serial transmission with two stop bits.

c. Asynchronous serial transmission with one stop bit

Differentiate between RISC vs CISC architecture?

What is Direct Memory Access? Explain the working of DMA. What are the different kinds of DMA transfers?

1.Find the Laplace Transform of the function g(t)=u(t)+2exp(-2t)u(t)+2cos(3000t)u(t)+

exp(-5t)sin(5000t)u(t) . Indicate the positions of zeros and poles .

2.) Find the Inverse Transform of the function 1/(s^2+6s+9)

A rope AB, 2.7 m long is connected at A and B to two points on the same level, 2.4 m apart. A load of 136 N is suspended from a point C on the rope 90 cm from A. What load connected to a point D on the rope, 60 cm from B, will be necessary to keep the portion CD level?

Consider the circuit shown in Fig. 1. If 𝑉1 = 10V; the BJT has a β = 200 and 𝐼𝑠 = 10 𝑎𝐴 and the

capacitors are short circuits in the frequency range of operation, determine the values of 𝑅1 and 𝑅2, if

the amplifier is to have a gain of 100. What is its’ operating point ? It is given that 𝑅3 = 100 Ω.

An air standard ideal Diesel engine (k for air = 1.4) operates with a pressure and temperature at the start of the compression stroke of 14.7 psia and 550°R. If the cut-off ratio and clearance volume are 2.5 and 1.0 ft3, respectively, calculate

(a) Pressure, temperature and specific volume at the 4 states of the cycle

(b) Clearance

(c) Thermal efficiency

(d) MEP for the cycle.

Write short notes on the following:

a) Projection

b) affine transformations

c) Phong's Shading Model

d) Scan conversion of polygons

e) B-splines