Embedded Engineer Interview Questions and Answers for Freshers

Calculate the number of cars on a bridge over a specific time interval based on given rates.

• Determine the rate of cars passing per minute.

• Calculate the total time interval in minutes.

• Multiply the rate by the time to find total cars.

• Example: If 10 cars pass per minute for 5 minutes, total = 10 * 5 = 50 cars.

C is a general-purpose programming language, while Embedded C is tailored for programming embedded systems with hardware-specific features.

• Embedded C includes additional libraries for hardware manipulation, such as <avr/io.h> for AVR microcontrollers.

• C is platform-independent, while Embedded C is designed for specific microcontrollers and hardware architectures.

• Embedded C often involves direct memory access and manipulation, which is less common in standard C programming.

• In E...read more

The volatile keyword in C/C++ indicates that a variable may be changed unexpectedly, preventing compiler optimizations.

• Memory Access: Volatile tells the compiler that the variable can be changed by external factors, like hardware or interrupts.

• Preventing Caching: It prevents the compiler from caching the variable in a register, ensuring it always reads the latest value from memory.

• Use in Multithreading: In multithreaded applications, volatile is used to indicate that a variab...read more

Storage classes in C specify the scope and lifetime of variables.

• Storage classes include auto, register, static, and extern.

• Auto variables are local to a block and have automatic storage duration.

• Register variables are stored in CPU registers for faster access.

• Static variables retain their value between function calls.

• Extern variables are declared in one file and can be used in another file.

A structure program is a program that uses structures to group related data together.

• Structures in C programming allow you to group related data together under one name.

• You can define a structure using the 'struct' keyword.

• Structures can contain different data types, including int, float, char, and even other structures.

• You can access the members of a structure using the dot operator.

• Example: struct employee { int id; char name[20]; float salary; };

• Example: struct employee em...read more