C Programming Placement Prep

What is the difference between 'int' and 'float' data types in C?

• int is used for characters, while float is used for integers

• int and float are interchangeable data types in C

• int stores floating-point numbers, while float stores integer values

• The main difference between 'int' and 'float' data types in C is that 'int' stores integer values, whereas 'float' stores floating-point numbers.

How do you declare a constant variable in C?

• constant int MY_CONSTANT = 5;

• const int MY_CONSTANT = 5;

• int const MY_CONSTANT = 5;

• const MY_CONSTANT = 5;

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

• To execute code conditionally

• To declare variables

• To repeat code multiple times

• To define a function

What is the syntax for 'switch' statement in C?

• switch(expression) { case constant1: statements1; break; case constant2: statements2; break; case constant3: statements3; break; default: defaultStatements; }

• switch(expression) { case constant1: statements1; break; case constant2: statements2; break; default: defaultStatements; }

• switch(expression) { case constant1: statements1; break; case constant2: statements2; break; default: defaultStatements; }

• switch(expression) { case constant1: statements1; break; case constant2: statements2; break; case constant3: statements3; break; }

What is the use of 'while' loop in C?

• The 'while' loop in C is used to repeatedly execute a block of code as long as the specified condition is true.

• The 'while' loop in C is used to terminate the program

• The 'while' loop in C is used to execute code only once

• The 'while' loop in C is used to skip code execution

How do you define a function in C?

• return_type function_name(parameters) { // function body }

• return_type(parameters) { // function body } function_name

• function_name(parameters) { // function body }

• function_name(parameters) { // function body } return_type

What is recursion in C programming?

• Recursion in C programming is a technique where a function calls itself directly or indirectly.

• Recursion in C programming is a data type

• Recursion in C programming is a conditional statement

• Recursion in C programming is a loop structure

What is the difference between 'return' and 'void' in function declaration?

• 'return' is used for loops, 'void' is used for conditionals

• The difference is that 'return' is used when the function will return a value after execution, while 'void' is used when the function will not return any value.

• 'return' is for integers, 'void' is for strings

• 'return' is for input, 'void' is for output

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

• To terminate the execution of a loop or switch statement.

• To execute a block of code repeatedly

• To skip the next iteration of a loop

• To print a message on the screen

What is the scope of a variable in C?

• Local variables are declared within a block of code and are only accessible within that block. Global variables are declared outside of any function and can be accessed throughout the program. Function prototype scope refers to the parameters of a function.

• Local variables are declared outside of any function

• Function prototype scope refers to the return value of a function

• Global variables are only accessible within a block of code