state exams

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What is an embedded system?
оқуды бастаңыз
A dedicated computer system embedded within a larger device, designed for specific control functions
Name three common communication protocols used in microcontrollers
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UART, SPI, I2C
What are the three main types of materials in electrical engineering
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Conductors, semiconductors, insulators
What is the difference between countable and uncountable sets?
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Countable sets can be out in one-to-one with natural numbers; uncountable sets cannot
Define reflexive, symmetric, and transistive properties of a binary relation
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Reflexive xRx = xRx; symmetric xRy = yRx; transistive xRy = yRz then xRz
What does a =_ b (mod n) mean
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a and b have the same remainder when divided by n
write the general form of a linear ordinary differential equation of order n
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an(t)y^n + an-1(t)y^n-1=... a0(t)y = g(t)
How do you find the general solution to a homogenous linear ODE with constant coefficients
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solve the characteristic equation for roots r; solution is a combination of terms like e^rt
What is the key idea behind the gaussian elimination alogirthm
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use row operations to reduce the system to upper triangular form then solve by back substitution
Name two iterative methods for solving large linear systems
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Jacobi method and gauss seidel method
What is the difference between combinational and sequential logic circuits
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combinational output depend only on current inputs while sequential on inputs and past states
what is a tree in graph theory
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a connected acyclic graph
what does the rank of a matrix indicate
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the maximum number of linearly independent rows or columns
what is the difference between absolute and relative error
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absolute error is the magnitude of the difference between true and approximate value; relative error is the absolute error divided by the true value
What is simple harmonic motion
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oscillatory motion described by x=A cos(wt+ phi) where w = sqr(k/m)
define stability in system control
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a system is stable if it returns to equilibrium after a disturbance
what is an equivalence relation
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a relation that is reflexive symmetric and transitive
what is the role of eigenvalues and eigenvectors in solving systems of linear ODEs
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they help find the fundamental solutions typically e^deltat v
name common numerical integration methods
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trapezoidal and simpson rule
what is the wronskian used for
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to check the linear independence of solutions to differential equations
what is the significance of the condition number of a matrix
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it measures how sensitive the solution of a linear system is to changes or errors in the input
what is the difference between homogenous and nonhomgenous differential equations
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homogenous has zero forcing them
what components make up a typical microcontroller architecture
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cpu; ram; rom; i/o ports; timers; ADC/DAC; communication interfaces
difference between conductors semiconductors and insulators in terms of electron flow
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conductors have free electrons for easy flow, semiconductors have linited free electrons; insulators gave very few free electrons
what is the a* algorithm
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it finds the shortest path efficiently using heuristics
define open loop and closed loop control systems
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open loop has no feedback; close loop uses feedback to adjust output
what data structure is ideal for implementing a priority queue
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binary heap
what is the purpose of a flip flop in digital circuits
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to store one bit of memory
formula for frequency of simple harmonic motion
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f = 1/2pi * sqr(k/m)
difference between mean and variance of data set
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mean avarage of values while variance is average of squared deviayions from mean
what is bipartite graph
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graph whose vertices can be divided jnto two disjoint sets with edges only between sets
what is modular arithmetic used for
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to perform calculations with numbers wrapped around after reaching a certain modules
how does the method of jndetermined coefficients work for solving ODEs
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guess the form of particular solution based on g(t) and solve for coefficients
dofference between lu and choelsky decomposition
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lu is for general matrices cholesky for symmetric positive definite matrices
name a common iterative method for large sparse linear systems and its key advantage
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conjugate gradient method; it converges wuickly for positive definite matrices
what is the main cause of truncation error in nimerical methods
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approximating infinite series or derivatives by finite steps
whats the general structure of a feedback control system
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input - controller - plant - output - feedback -comparator - controller
how do you test uf a set of vectors is linearly independent
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check if the determinant of the matrix formed by vectors is nonzero or use wronskian for functions
what is the significance of eigenvalues with negative real parts in control systems
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they kndicate stable system behavior
difference between trapezoidal and simposns rile for number integration
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approximation with trapezoids or uses a parabolic arcs generally more accurate
whats equivalence class
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a subset where all elements are equivalent under an equivalnce relation
whens algorithm stable
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small input errors produce small output errors so no amplification of errors
whats bayes theorem used for in data classification
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updating the probability estimate for a hypothesis as more evidence becomes available
dofference between parametric and non parametric estimation
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in parametric we assume distribution
what role timers and interrupts play in microcontrollers
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timers measure intervals; interrupts handle asynchronous events efficiently

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