C Programming Language Basics Quiz

What is the difference between a variable and a constant in C programming?

• Variables are used for integers, constants are used for strings

• Variables can be changed, constants cannot be changed

• Variables and constants are the same thing

• Variables are only used in functions, constants are used in main program

Explain the concept of data types in C programming with examples.

• Data types in C programming refer to the type of data that a variable can store. Examples of data types in C include int, float, char, and string.

• Data types in C programming refer to the type of data that a variable can store. Examples of data types in C include int, float, char, and double.

• Data types in C programming refer to the type of data that a variable can store. Examples of data types in C include int, float, char, and boolean.

• Data types in C programming refer to the type of data that a variable cannot store. Examples of data types in C include string, boolean, and array.

What is the purpose of if-else statement in C programming? Provide an example.

• To print a message on the screen

• To repeat a block of code a specific number of times

• To make decisions based on conditions

• To declare a variable

How does a switch statement work in C programming? Give an example.

• Switch statement in C programming works by randomly selecting a code block to be executed.

• Switch statement in C programming works by evaluating an expression and comparing it with the values of various case labels to select one of many code blocks to be executed.

• Switch statement in C programming works by executing all code blocks simultaneously.

• Switch statement in C programming works by evaluating an expression and comparing it with the values of various case labels to select one of many code blocks to be executed.

What is the difference between call by value and call by reference in C programming?

• Call by value passes a copy of the actual parameter, while call by reference passes the address of the actual parameter.

• There is no difference between call by value and call by reference

• Call by reference passes a copy of the actual parameter

• Call by value passes the address of the actual parameter

Explain the concept of function scope in C programming with an example.

• Variables declared inside a function are only accessible within that function.

• Variables declared inside a function are accessible globally

• Variables declared inside a function are only accessible within other functions

• Variables declared inside a function are accessible outside the program

What is the significance of pointers in C programming? Give an example.

• Pointers in C programming have no significance and are rarely used

• Pointers in C programming allow direct access to memory, which can be useful for dynamic memory allocation, creating data structures, and implementing efficient algorithms.

• Pointers in C programming are only used for simple arithmetic operations

• Pointers in C programming are used for creating graphical user interfaces

How is input taken from the user in C programming? Provide an example.

• Using the print() function. Example: int num = input('Enter a number: ')

• Using the scanf() function. Example: int num; printf("Enter a number: "); scanf("%d", &num);

• Using the get() function. Example: int num = get('%d', &num)

• Using the input() function. Example: int num = scanf('%d', &num)

Explain the concept of output formatting in C programming with an example.

• Output formatting in C programming refers to adjusting the font style and size of the printed text

• An example of output formatting in C programming is using the printf() function to display a floating-point number with a specific width and precision, such as printf("%10.2f", 123.456);

• Using the scanf() function to input a string in C programming

• Output formatting in C programming involves using the putchar() function to display characters on the screen

What is the last-in, first-out (LIFO) property of a stack?

• The first element inserted is the first one to be removed.

• The last element inserted is the first one to be removed.

• Elements can be removed in any order.

• None of the above.