Aptiv Interview Questions and Answers for Freshers

Interview questions for Embedded Software Engineer including Autosar, function definition, structure and union, microcontroller and microprocessor, and communication protocols.

• Autosar is an automotive software architecture standard.

• Function definition specifies the code to be executed by a function.

• Function declaration specifies the function's name, return type, and parameters.

• Structure is a collection of variables of different data types, while union is a collection of varia...read more

A program on structures using pointers to declare them.

• Use the 'struct' keyword to define a structure

• Use the 'typedef' keyword to create a new type name for the structure

• Use the '->' operator to access structure members through a pointer

• Example: typedef struct { int x; int y; } Point; Point *p;

• Example: p->x = 5; p->y = 10;

Storage class specifiers in C are used to define the scope and lifetime of variables.

• There are four storage class specifiers in C: 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 have a lifetime throughout the program and are initialized only once.

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

• Storage class spec...read more

Preprocessor in C is a tool that processes source code before compilation.

• It performs macro substitution

• It includes header files

• It conditionally compiles code

• It defines constants and symbols

• It removes comments

• Examples of preprocessor directives are #include, #define, #ifdef, #ifndef, #endif

• Preprocessor directives start with a # symbol

An Interrupt Service Routine (ISR) is a function that is executed in response to an interrupt signal.

• ISR is a type of callback function that handles interrupts

• It is a low-level function that runs in response to a hardware event

• ISR must be short and fast to avoid blocking other interrupts

• Examples of interrupts include keyboard input, timer events, and hardware errors

Interrupts are signals sent to the processor to temporarily halt its current task and execute a specific task.

• Hardware interrupts - generated by external devices

• Software interrupts - generated by software programs

• Maskable interrupts - can be disabled by the processor

• Non-maskable interrupts - cannot be disabled by the processor

• Examples - keyboard input, mouse input, timer interrupts, etc.