Renu Electronics Embedded Developer Interview Questions and Answers

Data types in C define the type of data that a variable can hold, such as int, float, char, etc.

• Basic data types in C include int, float, char, double, and void.

• Derived data types in C include arrays, pointers, structures, and unions.

• Examples: int num = 10; float price = 25.50; char letter = 'A'; int arr[5];

Structures in C are user-defined data types that allow for grouping different data types under a single name.

• Structures can contain variables of different data types, allowing for more complex data organization.

• They are defined using the 'struct' keyword.

• Example: struct Person { char name[50]; int age; float salary; };

• Individual members of a structure can be accessed using the dot operator (.)

• Example: struct Person p1;

Bit manipulation involves operations on individual bits of binary numbers.

• Bitwise AND, OR, XOR, and NOT operations are commonly used in bit manipulation.

• Shifting bits left or right can be used to multiply or divide by powers of 2.

• Setting or clearing specific bits using masks is another common technique.

• Example: Setting the 3rd bit of a number to 1 - num |= (1 << 3);