20+ Michelin Interview Questions and Answers

Interrupts are signals that temporarily halt the execution of a program to handle a specific event.

• When an interrupt occurs in 8051, the program counter is saved on the stack and the interrupt service routine (ISR) is executed.

• The ISR handles the interrupt and then returns control to the main program by restoring the program counter from the stack.

• If an interrupt occurs while another interrupt is being serviced, the second interrupt is queued and handled after the first one i...read more

Von Neumann and Harvard are computer architecture classifications. 8051 belongs to Harvard architecture.

• Von Neumann architecture has a single memory space for data and instructions, while Harvard architecture has separate memory spaces for data and instructions.

• 8051 microcontroller uses Harvard architecture as it has separate memory spaces for program instructions and data.

• Harvard architecture allows simultaneous access to both program memory and data memory, which increases ...read more

The location of current line of execution is stored in the stack when there is an interrupt.

• When an interrupt occurs, the processor saves the current state of execution on the stack.

• The location of the current line of execution is stored in the program counter (PC) register.

• The PC register is pushed onto the stack along with other registers.

• After the interrupt is serviced, the processor pops the saved state from the stack and resumes execution from the PC value.

The 8051 micro-controller consists of CPU, RAM, ROM, Timers, Serial Port, Interrupts, and I/O ports.

• The CPU is the main processing unit of the micro-controller.

• The RAM is used for storing data temporarily.

• The ROM contains the program code that is executed by the CPU.

• The Timers are used for generating precise time delays.

• The Serial Port is used for communication with other devices.

• The Interrupts are used for handling external events.

• The I/O ports are used for interfacing with ...read more

Remove spaces from input string and return output string

• Iterate through each character of the input string

• If the character is not a space, add it to the output string

• Return the output string

Draw half adder and full adder without using EXOR gate.

• Half adder can be implemented using AND and OR gates

• Full adder can be implemented using two half adders and an OR gate

• In half adder, sum is obtained by ORing two inputs and carry is obtained by ANDing two inputs

• In full adder, sum is obtained by using two half adders and an OR gate, and carry is obtained by ANDing three inputs

Microprocessors are general-purpose CPUs while microcontrollers are designed for specific tasks.

• Microprocessors are used in computers, smartphones, and other devices that require complex processing.

• Microcontrollers are used in embedded systems, such as home appliances, automotive systems, and medical devices.

• Microprocessors have separate memory and I/O interfaces while microcontrollers have them integrated on a single chip.

• Microprocessors are more expensive than microcontroll...read more

Logic gates are basic building blocks of digital circuits. They perform logical operations on inputs to produce outputs.

• AND gate: output is 1 only if both inputs are 1

• OR gate: output is 1 if either input is 1

• NOT gate: output is the opposite of the input

• NAND gate: output is 0 only if both inputs are 1

• NOR gate: output is 0 if either input is 1

• XOR gate: output is 1 if inputs are different

• XNOR gate: output is 1 if inputs are the same

A null pointer points to nothing while a void pointer can point to any data type.

• A null pointer is a pointer that has been explicitly set to a null value.

• A void pointer is a pointer that has no type associated with it.

• A null pointer is a subtype of a void pointer.

• A null pointer is used to indicate that a pointer does not point to a valid object.

• A void pointer is used to store a pointer to any type of object.

Distributor-type fuel pumps are mechanical fuel pumps commonly used in older vehicles.

• Distributor-type fuel pumps are driven by the engine's camshaft or distributor shaft.

• They are typically found in carbureted engines.

• These pumps deliver fuel to the carburetor through a series of mechanical components.

• Examples include the AC Delco mechanical fuel pump and the Carter mechanical fuel pump.

Perspective view in ED refers to the way a patient's condition is assessed and managed from different angles or viewpoints.

• Perspective view in ED involves considering the patient's medical history, symptoms, physical examination findings, and test results.

• It also includes taking into account the patient's social, psychological, and environmental factors that may impact their health.

• For example, a patient presenting with chest pain may have different perspectives in terms of c...read more

Machine operation in cutting in nozzle body horizontal and vertical side.

• The machine should be set up to cut the nozzle body horizontally and vertically.

• The cutting process should be precise and accurate to ensure proper functionality of the nozzle.

• Proper safety measures should be followed during the operation.

• Regular maintenance and calibration of the machine is necessary to maintain cutting quality.

• Examples of machines used for cutting nozzle bodies include CNC machines, la...read more

Induction motor works on the principle of electromagnetic induction to convert electrical energy into mechanical energy.

• Induction motor has a stator and a rotor

• Stator has a set of coils that are supplied with AC current

• This creates a rotating magnetic field which induces current in the rotor

• The rotor then starts rotating due to interaction with the magnetic field

• Induction motor is widely used in industries for various applications

Machine learning algorithms are used to analyze data, learn patterns, and make predictions without being explicitly programmed.

• Machine learning algorithms can be categorized into supervised, unsupervised, and reinforcement learning.

• Examples of machine learning algorithms include linear regression, decision trees, support vector machines, and neural networks.

• These algorithms are used in various applications such as image recognition, natural language processing, and recommenda...read more

Function pointer is a variable that stores the address of a function and can be used to call that function.

• Function pointers are used to pass a function as an argument to another function.

• They can be used to implement callbacks and event handlers.

• Function pointers can be used to implement polymorphism in C.

• They can be used to switch between different implementations of a function at runtime.

The least count of an instrument is the smallest measurement that can be made with that instrument.

• Least count is determined by the smallest division on the scale of the instrument.

• It is important to consider the least count when taking measurements to ensure accuracy.

• Examples of instruments and their least counts include: micrometer (0.01mm), vernier caliper (0.02mm), and dial gauge (0.01mm).

Electricity is a form of energy resulting from the movement of charged particles.

• Electricity is the flow of electrons through a conductor.

• It can be generated by various means such as chemical reactions, electromagnetic induction, and solar power.

• Electricity can be harnessed to power devices and machines, and is essential for modern life.

• It can be dangerous if not handled properly, and safety precautions should always be taken.

• Examples of electricity in action include lighting...read more

To remove an element from a doubly linked list, we need to update the pointers of the previous and next nodes.

• Find the node to be removed

• Update the pointers of the previous and next nodes to skip the node to be removed

• Free the memory occupied by the removed node

Modling in injector is a process used in manufacturing to create complex shapes by injecting molten material into a mold.

• Modling in injector is commonly used in industries such as automotive, aerospace, and consumer goods.

• The process involves heating the material until it becomes molten and then injecting it into a mold cavity.

• The material solidifies inside the mold, taking the shape of the cavity.

• Examples of materials commonly used in injection molding include plastics, meta...read more

Drawing views are used to represent a 3D object in 2D form. There are several types of views that can be used.

• The most common views are front, top, and side views.

• Isometric views show the object at a 45-degree angle.

• Orthographic views show the object as if it were projected onto a flat surface.

• Section views show the inside of the object by cutting away a portion of it.

• Exploded views show the individual parts of the object separated from each other.

• Each view should be labeled ...read more

Email in German

• Guten Tag,

• Ich schreibe Ihnen bezüglich...

• Bitte lassen Sie mich wissen, ob...

• Vielen Dank im Voraus.

• Mit freundlichen Grüßen,

Sort an array of integers

• Use a sorting algorithm like bubble sort, insertion sort, or quicksort

• Consider the size of the array and the efficiency of the algorithm

• Check for edge cases like empty arrays or arrays with only one element