10+ yellow.ai Interview Questions and Answers

A low pass analog filter is designed to allow low frequency signals to pass through while attenuating high frequency signals.

• Determine the cutoff frequency for the filter

• Choose a suitable filter design method (e.g., Butterworth, Chebyshev, etc.)

• Select the appropriate order for the filter

• Design the filter circuit using passive components (resistors, capacitors, inductors)

• Simulate and test the filter response using software tools (e.g., SPICE)

• Verify the filter performance throu...read more

A capacitor is an electronic component that stores and releases electrical energy. An inductor is a coil that stores and releases magnetic energy.

• Capacitor: Stores electrical energy and releases it when needed.

• Inductor: Stores magnetic energy and releases it when needed.

• Capacitors are commonly used in electronic circuits to smooth out voltage fluctuations.

• Inductors are used in applications such as transformers and electric motors.

An inverter is a device that converts DC power to AC power, allowing for the use of AC appliances.

• An inverter uses electronic components to convert the direct current (DC) from a power source, such as a battery or solar panel, into alternating current (AC).

• It typically consists of a rectifier, which converts AC to DC, and an inverter circuit, which converts DC back to AC.

• The inverter circuit uses switches, such as transistors or thyristors, to rapidly switch the DC voltage on...read more

I would carefully consider the offer and weigh the pros and cons before making a decision.

• I would evaluate the other company's offer in terms of salary, benefits, work-life balance, and growth opportunities.

• I would also consider the company culture and values to ensure they align with my own.

• If the other offer is significantly better, I would discuss it with my current employer and see if they are willing to match or improve their offer.

• Ultimately, I would make a decision bas...read more

A process is an instance of a program, while a thread is a unit of execution within a process. Threading in Linux allows for concurrent execution.

• A process is an independent entity that can be scheduled and allocated resources by the operating system.

• Threads are lightweight units of execution within a process that share the same memory space.

• Threading in Linux is implemented using the clone() system call.

• Threads in Linux can be created using the pthread library.

• Process priori...read more

Diode - semiconductor device allowing current to flow in one direction. Rectifier - converts AC to DC. Microcontroller - integrated circuit for controlling functions. Microprocessor - CPU for processing data. Memory - storage for data. Transistor - semiconductor device for amplifying or switching signals. MOSFET - type of transistor. Opamps - electronic amplifier.

• Diode allows current in one direction (ex: LED)

• Rectifier converts AC to DC (ex: bridge rectifier)

• Microcontroller c...read more

Memory testing is the process of evaluating the performance and reliability of a device's memory storage.

• Test read and write speeds of the phone memory

• Test memory capacity by filling it with data and checking for errors

• Test memory stability by running continuous read/write operations

• Test memory fragmentation by storing and deleting files multiple times

• Test memory leakage by monitoring memory usage over time

Regression, smoke, and sanity testing are different types of software testing used to ensure the quality of a product.

• Regression testing involves retesting the software after changes to ensure that new code has not adversely affected existing functionality.

• Smoke testing is a preliminary test to check if the basic functionalities of the software are working fine before proceeding with further testing.

• Sanity testing is a narrow and focused test to check specific areas of the so...read more

The 15th bit of the hexadecimal number 0x12345678 is 0.

• To find the 15th bit, convert the hexadecimal number to binary.

• Counting from right to left, the 15th bit is the 2nd bit from the left.

• In this case, the 15th bit is 0.

Companies policy and terms and conditions are guidelines and rules set by a company for employees and customers.

• Companies policy outlines rules and regulations for employees to follow.

• Terms and conditions specify the rules for customers using a company's products or services.

• Policies may include dress code, attendance, and code of conduct.

• Terms and conditions may cover payment terms, warranties, and return policies.

A function to print the reverse of a given string.

• Create a function that takes a string as input.

• Initialize an empty string to store the reversed string.

• Iterate through the characters of the input string in reverse order.

• Append each character to the reversed string.

• Print the reversed string.

OOP concepts in C++

• Encapsulation: bundling of data and methods into a single unit

• Inheritance: creating new classes from existing ones

• Polymorphism: ability of objects to take on many forms

• Abstraction: hiding unnecessary details and exposing only essential features

• Encapsulation example: class with private data members and public methods

• Inheritance example: derived class inheriting properties and methods from a base class

• Polymorphism example: function overloading or virtual func...read more

To check stack overflow, monitor stack usage and compare it to the maximum stack size.

• Monitor stack usage by keeping track of the current stack pointer.

• Compare the current stack pointer to the start of the stack and the maximum stack size.

• Use a watchdog timer to detect stack overflow if the stack pointer exceeds the maximum stack size.

• Use a stack overflow handler to gracefully handle stack overflow and prevent system crashes.

A program to print prime numbers.

• Iterate through numbers from 2 to n

• Check if the number is divisible by any number from 2 to its square root

• If not divisible, then it is a prime number