C Programming Essentials

What are the basic data types in C?

• boolean

• string

• array

• int, float, double, char, void

How do you declare an integer variable in C?

• float myVariable;

• integer myVariable;

• myVariable int;

• int myVariable;

What is the size of a float data type in C?

• 16 bytes

• 4 bytes

• 8 bytes

• 2 bytes

Explain the difference between signed and unsigned data types.

• Signed data types can only represent positive values; unsigned data types can represent both negative and positive values.

• Signed data types can represent negative and positive values; unsigned data types can only represent non-negative values.

• Signed data types are used for floating-point numbers; unsigned data types are used for integers.

• Both signed and unsigned data types can represent negative values, but signed types are larger.

What is the purpose of the 'sizeof' operator in C?

• The 'sizeof' operator compares two variables for equality.

• The 'sizeof' operator is used to declare new data types.

• The 'sizeof' operator is used to allocate memory dynamically.

• The 'sizeof' operator returns the size of a data type or variable in bytes.

How do you define a constant in C?

• Defining with 'let'

• Using 'static' keyword

• You can define a constant in C using 'const' or '#define'.

• Declaring with 'var'

What is a control structure in C?

• A control structure in C is a construct that controls the flow of execution in a program.

• A control structure in C is a library for managing memory.

• A control structure in C is a function that returns a value.

• A control structure in C is a type of variable.

Name the three types of control structures in C.

• Looping, Branching, Recursion

• Sequential, Selection, Iteration

• Conditional, Repetition, Sequence

• Iteration, Function, Exception

What is the syntax for an if statement in C?

• if { condition } { /* code to execute */ }

• if (condition) { /* code to execute */ }

• if condition { /* code to execute */ }

• if (condition) /* code to execute */ }

How does a switch statement work in C?

• A switch statement in C can only have one case block.

• A switch statement in C does not evaluate expressions.

• A switch statement in C only works with integer values.

• A switch statement in C evaluates an expression and executes the matching case block.