Syntax mastery, clean code, confidence

1. C language overview & compilation pipeline (preprocess → compile → link)
2. Data types, variables, constants
3. Operators & expressions
4. Input / Output (printf, scanf)
5. Control flow (if, switch, loops)
6. Functions (declaration, definition, return values)
7. Scope & lifetime
8. Coding style (Google readability principles)

Strong logic & data handling

1. Arrays (1D, 2D)
2. Array algorithms (search, sort basics)
3. Strings & string.h
4. Character arrays vs string literals
5. Nested loops & pattern problems
6. Time complexity basics (Big-O)

Master C’s hardest concepts

1. Pointer basics & arithmetic
2. Pointers with arrays & strings
3. Call by value vs reference
4. Recursion
5. Storage classes (static, extern)
6. Stack vs heap basics

Real-world program design

1. Structures & unions
2. Array of structures
3. Typedef
4. Dynamic memory (malloc, calloc, realloc, free)
5. Memory leaks & prevention
6. File handling (text & binary)

Google/Microsoft depth

1. Process memory layout
2. Stack vs heap growth
3. Command-line arguments
4. Low-level file I/O
5. System calls (POSIX basics)
6. Process creation (fork, exec)
7. IPC basics (pipes, signals)
8. Error handling (errno, perror)

International senior-level readiness

1. C standards (C99 → C23)
2. Undefined vs unspecified behavior
3. Bitwise operations
4. Preprocessor & macros
5. Function pointers & callbacks
6. Secure C coding (buffer overflow, CWE)
7. Debugging (GDB basics)
8. Static & dynamic analysis (Valgrind, ASan)
9. Testing fundamentals
10. Build systems (Make, CMake)