Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Bachelors Level/Second Year/Third Semester/Science bit/third semester/numerical methods/syllabus wise questions

Bachelors In Information Technology

Institute of Science and Technology, TU

Numerical Methods (BIT203)

Year Asked: Model, syllabus wise question

Interpolation and Regression
1.
How interpolation differs from regression? Write down algorithm and program for Lagrange interpolation. [10]
2.
Construct Newton's backward difference table for the given data points and approximate the value of f(x) at x=45.
X1020304050f(x)0.1730.3420.50.6430.766\begin{array}{|c|c|c|c|c|c|}\hline X & 10 & 20 & 30 & 40 & 50 \\ \hline f(x) & 0.173 & 0.342 & 0.5 & 0.643 & 0.766 \\ \hline \end{array}
[5]
3.
Fit the quadratic curve through the following data points and estimate the value of f(x) at x=2.
x13456y27875\begin{array}{|c|c|c|c|c|c|}\hline x & 1 & 3 & 4 & 5 & 6 \\ \hline y & 2 & 7 & 8 & 7 & 5 \\ \hline \end{array}
[5]
Numerical Differentiation and Integration
1.
How can we calculate derivatives of continuous functions? Write down algorithm and program for differentiating continuous function using two point forward difference formula. [5]
2.
Find following integral using composite trapezoidal rule using 2 segments (k=2) and 4 segments (k=4). ∫28(x+3)2dx\int_{2}^{8} (x+3)^2 dx [5]
Solution of Nonlinear Equations
1.
How Secant methods differs from Newton Raphson method? Derive the formula for Secant Method. Solve the equation cosx+2sinx−x2=0cosx+2sinx-x^2=0 using Secant method. Assume error precision is 0.01. [10]
2.
Define the terms true error and relative error? Write down algorithm for Horner' method to evaluate polynomial and use the method to evaluate the polynomial 2x3−3x2+5x−22x^3-3x^2+5x-2 at x=3. [5]
Solution of Ordinary Differential Equations
1.
Approximate the solution of y'=2x+y, y(0)=1 using Euler's method with step size of 0.1. Approximate the value of y(0.4). [5]
2.
How boundary value problems differs from initial value problems? Discuss shooting method for solving boundary value problem. [5]
Solution of Partial Differential Equations
1.
Solve the Poisson's equation ∇2f=xy\nabla^2 f = xy with f=2f=2 on boundary by assuming square domain 0≤x≤30 \leq x \leq 3, 0≤y≤30 \leq y \leq 3 and h=1. [5]
Solving System of Linear Equations
1.
Explain the working of Jacobi Iteration method? Solve the following system of equations using the method. Assume error precision is 0.01. Compare Jacobi Iteration method with Gauss-Seidel method. 5x−2y+3z=−15x-2y+3z=-1, −3x+9y+z=2-3x+9y+z=2, 2x−y−7z=−32x-y-7z=-3 [10]
2.
Derive formula for the Doolittle LU decomposition matrix factorization method. [5]