C Language Fundamentals

What are the basic data types available in C?

• int, float, double, char, void

• string, boolean, list, map

• integer, decimal, character, null

• list, short, long, float

Explain the difference between 'if' and 'switch' control structures.

• 'if' is used for loops, while 'switch' is for single conditions.

• 'if' is a function, while 'switch' is a variable type.

• 'if' can only handle two cases, whereas 'switch' can handle more than two.

• The 'if' structure is for conditional checks, while 'switch' is for evaluating multiple cases based on a single expression.

What is the purpose of a function in C?

• To create loops in C

• To define variables in C

• To manage memory allocation in C

• The purpose of a function in C is to encapsulate code for specific tasks, enabling code reuse and organization.

How do you declare a pointer in C?

• int *ptr[];

• int ptr;

• pointer int ptr;

• int *ptr;

What is the relationship between arrays and pointers in C?

• Arrays can only store integers in C.

• Arrays and pointers are closely related; the name of an array acts as a pointer to its first element.

• Pointers cannot be used to access array elements.

• The size of an array is always fixed and cannot be changed.

How do you open a file for reading in C?

• FILE *file = fopen("filename.txt", "r");

• FILE *file = fopen("filename.txt", "a");

• FILE *file = fopen("filename.txt", "w");

• FILE *file = open("filename.txt");

What is the scope of a variable declared inside a function?

• Block scope

• Static scope

• Local scope

• Global scope

How can you pass an array to a function in C?

• You can pass an array by its size as a parameter.

• You can pass an array to a function by using a pointer to its first element as a parameter.

• You must copy the array into a new array before passing it.

• You can only pass arrays by value in C.

What is the significance of the 'return' statement in a function?

• The 'return' statement is necessary for all functions to execute properly.

• The 'return' statement is only used in recursive functions.

• The 'return' statement is significant because it provides a way to send a value back from a function to the point where it was called.

• The 'return' statement is used to define a function's parameters.

How do you close a file that has been opened in C?

• Use close(file_pointer);

• Terminate(file_pointer);

• Use fclose(file_pointer);

• End(file_pointer);