FAQ's
Interview Questions
C INTERVIEW QUESTIONS
The C programming language has a number of important features, such as:
Procedural Language: C organises code into functions or processes in accordance with the procedural programming paradigm. Code written in C may run on many different platforms with little to no modification since it is very portable.
Effective: C is effective in terms of memory utilisation and execution speed because it permits fine-grained control over hardware resources.
Structured: It helps with the organisation and readability of the code by supporting structured programming using features like loops, conditionals, and functions. Programming in C is encouraged to be modular, allowing for code reuse and maintenance.
Pointers: The strong pointer manipulation provided by C enables the creation of intricate data structures and direct memory access. It includes a standard library (similar to the C Standard Library) that contains crucial functions and macros for typical tasks.
Low-Level Functionality: C allows low-levelWhen required, do operations like bit manipulation and direct memory addressing.
Resources and Community: It has a sizable community as well as a plethora of resources, such as books and documentation. Widely utilised: C is widely utilised in a variety of fields, including game development, embedded systems, and systems programming.
A token is the smallest meaningful text unit in a C programme. The fundamental units of a programme, tokens are used to denote a wide range of components, including operators, constants, operators, punctuation, and keywords.
For example, in the C statement:
int main() {
printf("Hello, World!");
return 0;
}
The tokens include: int, main, (, ), {, printf, "Hello, World!", ;, }, and return.
Tokens are separated by whitespace (spaces, tabs, newlines) and serve as the fundamental components that make up the C code, allowing the compiler to understand and process the program.
'f' is the correct response. Explanation: The expression is equal to "abxdef" and the string "abxdef" is an array. The inside-out expression is equivalent, but why? b[a] is equivalent to a[b] because *(a + b) is equivalent to *(b + a) is equivalent to *(b + a).
A preprocessor is a piece of software that performs operations on a source file before submitting it for compilation. The preprocessor allows for the inclusion of header files, macro expansions, conditional compilation, and line control.
The preprocessor #line, which accepts an argument as the line number, is used in C to reset the line
number in the code. Here is an illustration of the same.
#include
/*line 2*/
int main(){ /*line 3*/
/*line 4*/
printf("Hello world\n"); /*line 5*/
//print current line /*line 6*/
printf("Line: %d\n",__LINE__); /*line 7*/
//reset the line number by 36 /*line 8*/
#line 36 /*reseting*/
//print current line /*line 36*/
printf("Line: %d\n",__LINE__); /*line 37*/
printf("Bye bye!!!\n"); /*line 39*/
/*line 40*/
return 0; /*line 41*/
} /*line 42*/
Recursion occurs when a C function calls a copy of itself. To put it another way, this method is known as recursion when a function calls itself. This function is also referred to as a recursive function.
Recursive Function Syntax:
void do_recursion()
{
... .. ...
do_recursion();
.. .. ...]
}
int main()
{
.. .. ...
do_recursion();
... .. ...
}
EMBEDDED C QUESTIONS
Embedded Programming in C is an extension of the C programming language. It is named "embedded" because it is frequently used in embedded devices and shares the same syntax as C. For the purpose of creating foolproof embedded systems, embedded C includes I/O hardware operations and addressing, fixed-point arithmetic operations, memory/address space access, among other capabilities.
The following are the distinctions between Embedded C and conventional C language:
- Embedded C Language in C Language
- It is used for cross-developmental purposes and is of native development nature.
- Hardware and its underlying architecture are not relevant to C.The hardware architecture affects embedded C.
PIC MICROCONTROLLER QUESTIONS
Microcontrollers of the PIC type are frequently found in a range of embedded systems. PIC microcontrollers often have the following features:
- They are frequently quite compact and tiny, which makes them perfect for usage in embedded systems with limited space.
- They are versatile and adaptable to a variety of applications since they have a wide spectrum of capabilities, from very simple to very complicated.
- They are a popular choice for hobbyists and people just getting started with microcontrollers because they are comparatively simple to programme.
Analogue inputs are supported by PIC, yes. Your particular PIC microcontroller will determine the range, however most PICs have a range of 0-5V or 0-3.3V.