C Programming Unit Test II

What is the C character set?

• The C character set includes letters, digits, punctuation marks, and whitespace.

• Excludes punctuation marks and whitespace.

• Contains only uppercase letters.

• Only includes letters and digits.

Define identifiers and keywords in C.

• Identifiers are names for variables/functions; keywords are reserved words with special meaning.

• Identifiers and keywords are the same and can be used interchangeably.

• Identifiers are only used for functions; keywords are user-defined names.

• Keywords can be changed by the user; identifiers cannot be reserved.

List the basic data types available in C.

• int, float, double, char, void

• string

• boolean

• array

What are symbolic constants in C?

• Symbolic constants are variables that can change during program execution.

• Symbolic constants are fixed values defined using #define or const in C.

• Symbolic constants are values that can be modified at runtime.

• Symbolic constants are only used in C++ and not in C.

Explain the structure of a basic C program.

• C programs do not require a return statement at the end.

• A basic C program structure includes preprocessor directives, the main function, variable declarations, statements, and a return statement.

• A basic C program consists only of comments and whitespace.

• The main function is optional in a C program structure.

How do you write and execute your first C program?

• Use a text editor to write the program without compiling.

• Write a C program in Python and run it directly.

• Compile the C program using Java and execute it.

• Write a simple C program, compile it with GCC, and run the executable.

What is the purpose of the #include preprocessor directive?

• To include the contents of a file or library in the source code.

• To define a function in the source code.

• To execute a command during runtime.

• To create a new variable in the program.

Differentiate between arithmetic and unary operators in C.

• Unary operators require two operands to function.

• Arithmetic operators are used for logical comparisons.

• Arithmetic operators can only be used with integers.

• Arithmetic operators handle calculations between two or more operands, while unary operators work with a single operand to perform operations.

What is the function of the if statement in C?

• The if statement is a loop control structure in C.

• The if statement controls the execution of code based on a condition.

• The if statement is used to declare variables in C.

• The if statement is used for memory allocation in C.

Describe the for loop control structure in C.

• The for loop in C is used for defining functions.

• The for loop structure in C requires a return type.

• The for loop in C is only used for iterating over arrays.

• The for loop control structure in C is used for repeated execution of a block of code with a defined initialization, condition, and increment.