C Programming Fundamentals

What is the basic structure of a C program?

• The basic structure of a C program includes preprocessor directives, the main function, variable declarations, statements, and a return statement.

• Only includes the main function and return statement.

• Consists solely of variable declarations and comments.

• Requires a graphical user interface to run.

Name the primary data types in C.

• int, float, double, char, void

• array

• boolean

• string

What is the purpose of storage classes in C?

• The purpose of storage classes in C is to control the visibility, lifetime, and storage duration of variables.

• To define the data types of variables.

• To optimize the performance of the program.

• To manage memory allocation for functions.

List three keywords in C programming.

• while

• ['int', 'return', 'if']

• for

• switch

How do you convert a binary number to decimal in C?

• Use bitwise operations or a loop to calculate the decimal value from the binary representation.

• Use a string manipulation function to parse the binary digits.

• Use printf to display the binary number directly.

• Convert the binary number to hexadecimal first.

What is the function of the arithmetic operator '+' in C?

• The '+' operator multiplies two numbers in C.

• The '+' operator divides two numbers in C.

• The '+' operator adds two numbers or concatenates strings in C.

• The '+' operator subtracts two numbers in C.

Explain the use of the 'if' statement in decision making.

• The 'if' statement is only applicable in mathematical calculations.

• The 'if' statement is used to execute code based on whether a condition is true, enabling decision making in programs.

• The 'if' statement is used to declare variables in a program.

• The 'if' statement is used to define functions in programming.

What is a loop, and name two types of loops in C?

• for loop, while loop

• do while loop

• repeat until loop

• foreach loop

How do you declare an array in C?

• To declare an array in C, use the syntax: type arrayName[arraySize];

• array arrayName[type] = size;

• declare arrayName as type[arraySize];

• arrayName[type] = arraySize;

What is the difference between a string and a character array in C?

• A string can only contain letters, while a character array can contain any data type.

• A string is a null-terminated character array, while a character array does not have to be null-terminated.

• A string is always larger than a character array in memory.

• A string is a fixed-size array, while a character array can change size.