What will be the result of executing the following? #define PRINT(x) printf(#x) int main() { int a = 10; PRINT(a); return 0; }

The correct answer is A: a. The '#' operator (stringification) converts the macro argument into a string literal. PRINT(a) expands to printf("a"), which prints 'a'. If it were PRINT(10), it would print '10' as a string.

Which allocation method is most suitable for a dynamically growing linked list?

The correct answer is B: malloc() for each node as needed. Each node should be allocated individually with malloc() to allow dynamic growth and efficient memory usage.

What is the key distinction between if-else and switch statements in terms of evaluation?

The correct answer is B: if-else evaluates conditions, switch uses jump table for integral constants. switch typically uses jump tables for efficient multi-way branching with integral values, while if-else evaluates boolean expressions sequentially.

Which of the following is true about function pointers in C?

The correct answer is B: They enable dynamic function calls and callbacks. Function pointers are powerful features enabling dynamic function selection at runtime, crucial for callbacks, function arrays, and design patterns like strategy pattern.

Which scenario is most likely to cause a segmentation fault in dynamic memory?

The correct answer is B: Accessing memory beyond allocated size. Buffer overflow by accessing beyond allocated boundaries causes segmentation fault as it accesses invalid memory pages.

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C Programming
Arrays & Strings

C language from basics to advanced placement prep

21 Q 10 Topics Take Mock Test

Difficulty: All Easy Medium Hard 21–21 of 21

Topics in C Programming

All Basics & Syntax 86 Data Types & Variables 97 Control Flow 100 Functions 99 Arrays & Strings 100 Pointers 99 Structures & Unions 100 File Handling 100 Dynamic Memory 98 Preprocessor 99

Q.21 Hard Arrays & Strings

Consider a 2D array int matrix[3][3]. If we access matrix as a 1D array, how many total elements can we access?

A 3

B 6

C 9

D 27

Correct Answer: C. 9

EXPLANATION

2D array is stored contiguously in memory. 3x3 array has 9 elements total, accessible as a 1D array of 9 elements.

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C Programming Arrays & Strings

C Programming
Arrays & Strings