Mastering C Programming Concepts

Front

What are the basic data types available in C?

Back

int, float, double, char, void

Answer explanation

In C, the basic data types include int, float, double, char, and void. These types are fundamental for defining variables and functions, while boolean, string, and array are not considered basic data types in C.

Front

How do you declare an integer variable in C?

Back

int myVariable;

Answer explanation

In C, to declare an integer variable, you use the keyword 'int'. The correct syntax is 'int myVariable;'. The other options use incorrect types or keywords for variable declaration.

Front

What is the purpose of the 'if' statement in C?

Back

To execute code conditionally based on a boolean expression.

Answer explanation

The 'if' statement in C is used to execute code conditionally based on a boolean expression. It allows the program to make decisions and execute different code paths depending on whether the condition is true or false.

Front

What is the difference between 'while' and 'do while' loops?

Back

The main difference is that 'while' checks the condition before execution, while 'do while' checks after execution.

Answer explanation

The correct choice highlights that 'while' loops check the condition before executing the loop body, while 'do while' loops execute the body at least once before checking the condition, allowing for different control flow.

Front

How do you define an array in C?

Back

An array in C is defined as 'type name[size];'.

Answer explanation

In C, an array is defined using the syntax 'type name[size];', where 'type' specifies the data type, 'name' is the identifier, and 'size' indicates the number of elements. This makes the second choice the correct definition.

Front

What is the syntax to access an element in an array?

Back

arrayName[index]

Answer explanation

The correct syntax to access an element in an array is 'arrayName[index]'. This format uses square brackets to specify the index of the element you want to access, making it the standard way in many programming languages.

Front

How do you declare a string in C? Options: char[] myString = 'Hello, World!';, char myString = 'Hello, World!';, string myString = 'Hello, World!';, char myString[] = "Hello, World!";

Back

char myString[] = "Hello, World!";

Answer explanation

In C, strings are declared using double quotes. The correct syntax is 'char myString[] = "Hello, World!";'. The other options are incorrect due to the use of single quotes or incorrect data types.

Front

What function is commonly used to get the length of a string in C? Options: lengthOfString, strlen, strlength, getSize

Back

strlen

Answer explanation

In C, the function commonly used to get the length of a string is 'strlen'. It is part of the string.h library and returns the number of characters in a string, excluding the null terminator.

Front

What is a structure in C and how is it defined?

Back

A structure in C is defined using the 'struct' keyword, followed by the structure name and its members.

Answer explanation

A structure in C is defined using the 'struct' keyword, which allows you to create a custom data type that groups different data types together. This is the correct definition, unlike the other options which are incorrect.

Front

How do you access members of a structure in C?

Back

Use the dot operator (.) for structure variables and the arrow operator (->) for structure pointers.

Answer explanation

In C, you access structure members using the dot operator (.) for structure variables and the arrow operator (->) for structure pointers. This allows you to directly access the data contained within the structure.