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DMGT Mid-2 Exam Prep

English 13 leveled MCQs Free

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DMGT Mid-2 Exam Prep

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7 marks Long answer

Solve $a_n = a_{n-1} + f(n)$ for $n \ge 1$ by using substitution method.

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Use substitution to express $a_n$ in terms of $f(n)$.

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7 marks Long answer

Solve the recurrence relation $a_n = 3a_{n-1} + 2^n$ where $a_0 = 1$ by generating function.

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Use generating functions to find $a_n = 2^n + 1$.

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7 marks Long answer

Solve the recurrence relation $a_n - 4a_{n-1} + 3a_{n-2} = 2^n$, $n \ge 2$ with initial conditions $a_0=1, a_1=11$. using characteristic roots.

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The solution is $a_n = A \cdot 3^n + B \cdot 1 + 2^n$.

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5 marks Long answer

Prove that a tree with n vertices has n-1 edges.

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By induction, a tree with n vertices has n-1 edges.

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4 marks Medium answer

How many four digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5 if repetition of digits is allowed.

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There are 5,000 four-digit numbers.

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4 marks Medium answer

Find the no. of arrangements of the letters in the word ENGINEERING.

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The number of arrangements is 3,600.

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4 marks Medium answer

Find how many solutions are there for $x_1 + x_2 + x_3 = 17$, subject to the constraints $x_1 \ge 1, x_2 \ge 2, x_3 \ge 3$.

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There are 56 solutions.

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4 marks Medium answer

Find the coefficient of $x^3y^2z^2$ in $(2x-y+z)^7$.

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The coefficient is 840.

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4 marks Medium answer

Define ① Directed graph ② Complete graph ③ Hamilton graph ④ Eulerian graph.

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1. Directed graph: edges have direction; 2. Complete graph: every pair of vertices is connected; 3. Hamilton graph: contains a Hamiltonian cycle; 4. Eulerian graph: contains an Eulerian circuit.

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4 marks Medium answer

State Sum of degrees theorem (or) handshaking theorem and problems.

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The sum of degrees of all vertices in a graph is twice the number of edges.

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2 marks Short answer

Write Binomial theorem.

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The Binomial theorem states $(a + b)^n = \sum_{k=0}^{n} \binom{n}{k} a^{n-k} b^k$.

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2 marks Short answer

Define Euler's formula & problems.

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Euler's formula states $e^{ix} = \cos(x) + i\sin(x)$.

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2 marks Short answer

Define minimal spanning tree.

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A minimal spanning tree is a subset of edges that connects all vertices with the minimum total edge weight.

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