Handwritten notes · Part 16
C Language Handwritten Notes for Placements (Free PDF)
By Gaurav SharmaPublished
26 pages of handwritten-style C language notes for placements and interviews: compilation stages, data types and format specifiers, operators and precedence traps, functions and call by value, storage classes, arrays, strings, pointers, pointer arithmetic, const and function pointers, malloc and free, structure padding, bit manipulation, macros, file handling, undefined behaviour and an output quiz, with Hinglish explanations.
- Pages
- 26
- Format
- A4 PDF
- Language
- English + Hinglish
- Price
- Free by email
What's inside
24 topics, one page each
- 01What C is and the 4 compilation stages
- 02Data types, sizes and format specifiers
- 03Operators, precedence and undefined-behaviour traps
- 04Control flow: if, switch fall-through and loops
- 05Functions and call by value (swap with pointers)
- 06Storage classes: auto, static, extern, register
- 07Arrays, 2D arrays and array decay
- 08Strings, char[] vs char* and string.h
- 09Pointer basics: NULL, wild, dangling and void pointers
- 10Pointer arithmetic and pointers vs arrays
- 11Double pointers and const pointer variants
- 12Function pointers, callbacks and qsort
- 13Dynamic memory: malloc, calloc, realloc, free
- 14Memory layout, leaks, dangling pointers and double free
- 15struct, union, enum and typedef
- 16Structure padding and alignment
- 17Bit manipulation tricks
- 18Preprocessor, macros and macro pitfalls
- 19File handling with FILE *
- 20Recursion and the call stack
- 21Undefined behaviour and segmentation faults
- 22Interview questions with short answers
- 23Output prediction quiz
- 24Revision cheat sheet
C is still the first coding language in many campus placement tests, and its output questions catch even good programmers. These notes explain one idea per page, with short programs you can compile with gcc and check yourself.
What makes these C notes different?
- The classic traps, explained.
i++ + ++i, integer division,switchfall-through, macro expansion andsizeofinside a function, each with the reason behind the answer. - Pointers and memory, step by step. From
&and*to pointer arithmetic, const pointers, function pointers,malloc/reallocand the memory layout. - What interviewers love to ask. struct vs union, structure padding, storage classes, bit tricks, and undefined behaviour vs segmentation faults.
- A quiz and a cheat sheet. Predict the output of 11 snippets, then revise everything from the last page.
How should you use these C notes?
Type each example, compile it with gcc -Wall, and guess the output before you run it. Redo the padding and bit manipulation examples on paper, since they come up as written questions. Use the interview Q&A and the cheat sheet the night before the test.
This is Part 16 of the series. For object-oriented C++ on top of these basics, see the C++ handwritten notes.
FAQ
Questions about these notes
Are these C language notes really free?
Yes. The full 26-page PDF is free; email me to request the complete PDF. Share it with friends preparing for placements.
Are these notes good for beginners?
Yes. They start from compilation, data types and operators, then build up to pointers, dynamic memory and structure padding. You only need a C compiler such as gcc to try the examples.
Do the notes cover pointers and memory in depth?
Yes. Pointer basics, pointer arithmetic, double and const pointers, function pointers, malloc, calloc, realloc and free, the memory layout, and common bugs like leaks, dangling pointers, double free and segmentation faults.
Do the notes include C output questions?
Yes. There is an output prediction quiz with answers and explanations, plus output-style traps on operators, macros, structure padding and undefined behaviour throughout the notes.
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