C Programming

What is a C program’s structure? a) Preprocessor directives, functions, and variables b) Only functions and variables c) Only main function d) None of the above Answer: a) Preprocessor directives, functions, and variables Explanation: A typical C program consists of several components: preprocessor directives (such as #include), global variables, functions, and the main() function. The […]

How is a C program executed? a) Write, compile, and run b) Write and run c) Compile and run d) Write, run, and compile Answer: a) Write, compile, and run Explanation: A typical C program goes through three main stages: writing the source code, compiling the code into an executable file, and running the program.

What is the first step in writing a C program? a) Writing the code in a text editor b) Compiling the code c) Running the program d) Debugging the code Answer: a) Writing the code in a text editor Explanation: The first step in writing a C program is to write the source code using

What do you need to set up C programming? a) C compiler b) IDE c) Text editor and terminal d) All of the above Answer: d) All of the above Explanation: Setting up a development environment for C programming typically requires a C compiler (like GCC), a text editor (such as Visual Studio Code, Sublime

Is C object-oriented? a) Yes b) No c) Partially d) Depends on usage Answer: b) No Explanation: C is not an object-oriented programming language. It is procedural, meaning it focuses on functions and the sequence of operations in the program rather than objects and classes. While C can simulate some object-oriented principles through structures and

What is the role of main() in C? a) First function executed b) Handles memory allocation c) Initializes variables d) Declares all variables Answer: a) First function executed Explanation: The main() function serves as the entry point for any C program. When a program is executed, the runtime environment calls the main() function first, starting

What does the C Standard Library provide? a) Pre-written functions b) C language syntax c) Compiler specifications d) Code for the C compiler Answer: a) Pre-written functions Explanation: The C Standard Library offers a set of pre-written functions that assist in performing common tasks such as input/output operations, string manipulation, memory allocation, and mathematical calculations.

Why is C called a middle-level language? a) Combines low-level and high-level features b) Balances ease and performance c) Suited for mid-sized projects d) Developed between low-level and high-level languages Answer: a) Combines low-level and high-level features Explanation: C is termed a middle-level language because it incorporates features of both low-level and high-level languages. It

Is C a procedural language? a) Yes b) No c) Partially d) Depends on usage Answer: a) Yes Explanation: C is a procedural programming language, which means it follows a sequence of steps or procedures to solve a problem. In procedural languages, the focus is on functions and the logic that dictates how the program

What is the primary use of C language? a) Web development b) System programming c) Mobile apps d) Game development Answer: b) System programming Explanation: The C language is primarily used for system programming, which involves developing system software like operating systems, device drivers, and embedded systems. C provides low-level access to memory and system

Which of the following is not an operator in C? a) sizeof b) typeof c) ~ d) % Answer: b) typeof Explanation: typeof is not an operator in standard C. It is an extension provided by some compilers like GCC, used to determine the type of a variable or expression. The standard operators in C

What is the sizeof(char) in a 32-bit C compiler? a) 1 byte b) 2 bytes c) 4 bytes d) 8 bytes Answer: a) 1 byte Explanation: In a 32-bit C compiler, the sizeof(char) is always 1 byte. The size of a char is defined by the C standard and is independent of the system architecture,

In C language, FILE is of which data type? a) int b) char c) struct d) union Answer: c) struct Explanation: In C, FILE is a data type defined as a structure in the standard input-output library (stdio.h). It is used to represent and manage files within a program. The FILE structure contains information about

Which of the following return-type cannot be used for a function in C? a) void b) int c) struct d) array Answer: d) array Explanation: In C, a function cannot have an array as its return type. While functions can return other data types, such as int, void, and even struct, they cannot return an

Which of the following is not possible statically in C language? a) Static allocation of array size b) Static allocation of linked list c) Static allocation of structure members d) Static allocation of global variables Answer: b) Static allocation of linked list Explanation: In C, static allocation is possible for arrays, structure members, and global

How many number of pointer (*) does C have against a pointer variable declaration? a) One b) Two c) Multiple d) None Answer: c) Multiple Explanation: In C, a pointer declaration can have multiple asterisks (*), indicating that it is a pointer to a pointer, and so on. For example, int **ptr declares a pointer

Can C preprocessors have compiler-specific features? a) Yes b) No c) Only in some versions of C d) Only for macros Answer: a) Yes Explanation: Yes, C preprocessors can have compiler-specific features. While there are standard preprocessor directives defined by the C language, some compilers may introduce additional features or extensions that are specific to

What is #include <stdio.h>? a) A directive to include standard input-output library b) A directive to include standard math library c) A directive to include string handling library d) A directive to include file handling library Answer: a) A directive to include standard input-output library Explanation: #include <stdio.h> is a preprocessor directive used in C

Can functions return enumeration constants in C? a) Yes b) No c) Only if they are global d) Only if they are static Answer: a) Yes Explanation: In C, functions can indeed return enumeration constants. An enumeration is a user-defined data type consisting of named integer constants, and since these constants are integers, they can

What is an example of iteration in C? a) if-else statement b) for loop c) switch statement d) goto statement Answer: b) for loop Explanation: In C, a for loop is a common example of iteration, where a block of code is executed repeatedly based on a condition. Iteration structures like for, while, and do-while

Which of the following is NOT possible with any 2 operators in C? a) Concatenation b) Comparison c) Addition d) Assignment Answer: a) Concatenation Explanation: In C, concatenation of two values is not possible using any of the standard operators. Concatenation, typically associated with strings, is done using functions like strcat() in C, not operators.

Where in C does the order of precedence of operators not exist? a) Within parentheses b) Within a for loop c) Within a single expression d) Within a switch statement Answer: a) Within parentheses Explanation: The order of precedence of operators does not apply within parentheses in C. Parentheses are used to explicitly define the

Which of the following typecasting is accepted by C language? a) Implicit typecasting b) Explicit typecasting c) Both implicit and explicit typecasting d) None of the above Answer: c) Both implicit and explicit typecasting Explanation: C supports both implicit and explicit typecasting. Implicit typecasting occurs automatically when a value is converted to a different data

What is the result of logical or relational expression in C? a) A floating-point number b) A string c) An integer (0 or 1) d) A pointer Answer: c) An integer (0 or 1) Explanation: In C, the result of a logical or relational expression is an integer value: 0 (representing false) or 1 (representing

Which keyword is used to prevent any changes in the variable within a C program? a) static b) const c) volatile d) extern Answer: b) const Explanation: The const keyword in C is used to declare a variable as constant, meaning its value cannot be changed once it has been initialized. If you attempt to