Electrical and Computer Engineering Electrical and Computer Engineering Exam 1. What is the difference between a star and a delta configuration in a three-phase circuit? In a star configuration, the three phases are connected to a common point, while in a delta configuration, the three phases are connected in a loop. In a star configuration, the three phases are connected in a loop, while in a delta configuration, the three phases are connected to a common point. In a star configuration, the line voltage is equal to the phase voltage, while in a delta configuration, the line voltage is equal to the phase current. In a star configuration, the line current is equal to the phase current, while in a delta configuration, the line current is equal to the phase voltage. 2. Which of the following is a representation of a signal? Time domain Frequency domain State-space Phasor domain 3. What is the name of the theorem that states that any linear circuit with independent and dependent sources can be replaced by an equivalent circuit consisting of a voltage source and a series resistor? Thevenin's theorem Norton's theorem Superposition theorem Maximum power transfer theorem 4. What is a microcomputer? A general-purpose computer that is small enough to fit on a single chip A specialized computer that is designed to perform a specific task A computer that is used to control industrial processes A computer that is used for scientific research 5. What is the difference between a compiler and an interpreter in terms of software development? A compiler translates the entire source code into an executable file, while an interpreter translates and executes one line of source code at a time. A compiler translates and executes one line of source code at a time, while an interpreter translates the entire source code into an executable file. A compiler converts high-level programming languages into low-level machine languages, while an interpreter converts low-level machine languages into high-level programming languages. A compiler converts low-level machine languages into high-level programming languages, while an interpreter converts high-level programming languages into low-level machine languages. 6. What is the resonant frequency of a series RLC circuit? f = 1/√(LC) f = 1/(2π√(LC)) f = 2π√(LC) f = 2π√(L/C) 7. What is the name of the device that converts alternating current (AC) into direct current (DC)? Rectifier Capacitor Inductor Resistor 8. What is the convolution of two signals? The superposition of the two signals The weighted sum of the two signals The product of the two signals The cross-correlation of the two signals 9. What is an operational amplifier (op-amp)? A high-gain differential amplifier that is used to perform a variety of mathematical operations A passive electronic component that is used to store energy A passive electronic component that is used to filter electrical signals An active electronic component that is used to generate electrical signals 10. 11. Which of the following is a property of a linear, time-invariant system? Causality Linearity Time invariance Stability 12. What is a signal? A physical quantity that conveys information A mathematical representation of a physical quantity that conveys information A device that is used to generate or process signals A device that is used to store signals 13. What is an embedded system? A computer system designed to perform a dedicated function within a larger system A computer system designed for general-purpose use A computer system designed to be portable A computer system designed to be connected to the internet 14. What is the difference between a shunt and a series DC motor? In a shunt motor, the field winding is connected in parallel with the armature, while in a series motor, the field winding is connected in series with the armature. In a shunt motor, the field winding is connected in series with the armature, while in a series motor, the field winding is connected in parallel with the armature. In a shunt motor, the speed is inversely proportional to the load torque, while in a series motor, the speed is directly proportional to the load torque. In a shunt motor, the speed is directly proportional to the load torque, while in a series motor, the speed is inversely proportional to the load torque. 15. What is a diode? A two-terminal semiconductor device that allows current to flow in one direction only A three-terminal semiconductor device that can be used to amplify or switch electronic signals A passive electronic component that is used to store energy A passive electronic component that is used to filter electrical signals 16. What is the purpose of an input/output device (I/O device)? To allow the microcomputer to communicate with the outside world To store data To process data To control the microcomputer 17. What are the three layers of the OSI model? Application, Transport, and Network Application, Transport, and Session Application, Presentation, and Session Application, Presentation, and Network 18. What is the difference between a class and an object? A class is a blueprint for creating objects, while an object is an instance of a class A class is a collection of data and functions, while an object is a single instance of a class A class is a type of variable, while an object is a value A class is an abstract concept, while an object is a concrete entity 19. What is data communication? The process of exchanging data between two or more devices The process of storing data on a computer The process of transmitting data over a network The process of processing data 20. What is the transfer function of a first-order low-pass filter? H(s) = 1/(s + RC) H(s) = RC/(s + RC) H(s) = s/(s + RC) H(s) = 1/(s + 1/RC) 21. What is the difference between a method and a function? A method is a function that is defined within a class, while a function is a function that is defined outside of a class A method is a function that is called on an object, while a function is a function that is called directly A method is a function that can access the private members of a class, while a function cannot access the private members of a class A method is a function that is written in a specific language, such as Java or Python, while a function is a generic term for a piece of code that performs a specific task 22. What is the difference between a microwave transmission line and a microwave waveguide? A microwave transmission line is a two-conductor structure that is used to guide microwave signals, while a microwave waveguide is a hollow metal structure that is used to guide microwave signals A microwave transmission line is used to amplify microwave signals, while a microwave waveguide is used to filter microwave signals A microwave transmission line is used to generate microwave signals, while a microwave waveguide is used to amplify microwave signals A microwave transmission line is used to receive microwave signals, while a microwave waveguide is used to generate microwave signals 23. Which of the following is NOT an example of a data structure? Array String Linked list Queue 24. What is the purpose of a D flip-flop? A synchronous counter counts on a clock signal, while an asynchronous counter counts on a pulse signal. A synchronous counter is more accurate than an asynchronous counter. A synchronous counter is more complex to design than an asynchronous counter. A synchronous counter is used in applications where accuracy is important, such as digital clocks, while an asynchronous counter is used in applications where speed is important, such as frequency counters. Time is Up! Time's up
