Test your C skills - Programming Interview Questions

Explore pre and post increment and decrement in C, showing how A, B, and C change and how evaluation order determines the resulting outputs.

Explore prefix versus postfix increment and memory behavior, showing how post increment copies before incrementing and pre increment increments first, and the example yields outputs 7, 5, 7.

Explore operator precedence in C by evaluating expressions with plus, minus, multiply, and divide, applying left-to-right rules for same precedence and understanding function call order.

Debug looping statements by identifying which loop segments run with proper conditions, adding missing conditions for for loops, and using break statements to control flow, while ensuring semicolons are present.

Explore the break and continue statements in loops, learn how break stops the current iteration and exits the loop, while continue skips remaining code and proceeds to the next iteration.

Explore how a switch case evaluates values, handles case 1 and case 2, executes a common statement, and uses break and default when no case matches.

Compare a switch statement example to debunk a misconception; emphasize that case statements must not include extra labels, following a strict switch rule.

Explore multi-level pointers in C by tracing values through single, double, and triple pointers, dereferencing across addresses to retrieve final results.

Demonstrates pointer arithmetic in C with arrays and characters, showing bytewise movement and address calculations such as B, B+1, and B+2, plus memory layout and bit representation.

Explore pointers and structures in C by creating a structure, a variable, and a pointer to access its members, then print their values using the dot operator.

Explore creating and using function pointers in C, call functions through those pointers, and reuse a single pointer to invoke multiple functions with matching signatures.

Explore single and multidimensional array initialization in C, learning how to define, organize, and read one-dimensional and two-dimensional arrays with correct element layouts.

Explore array initialization in c, distinguishing partial and full initialization, and observe how local variables may hold garbage while globals default to zero, with practical output examples.

Explore jagged arrays in C by examining memory layout, element sizing, and indexing into subarrays with varying lengths, illustrated through concrete examples stored at memory location 200.

Explore how a jagged array program prints nested values by following pointers B and C, accessing B+1 and C+1 across multiple levels to reveal the final outputs.

Explore how jagged arrays are stored in memory, with each subarray as its own block and multi-level indexing to access elements, using a six-element, 4-byte example.

Explore how the sizeof operator computes memory for arrays in C, illustrating element size, array length, and total bytes for arrays and their elements.

Explore the preprocessor define macro, its text replacement behavior, and how it differs from functions, including argument handling, context, and operator precedence.

Explore how the define preprocessor works in C by showing macro replacements outside string literals, with examples like B1 and B2 substitutions. Learn how quoted text remains unchanged by preprocessing.