Understanding Programming Constructs

What is a constant in programming?

• A constant is a type of function that returns a fixed value.

• A constant is a value that can only be used once in a program.

• A constant is a fixed value that cannot be changed during program execution.

• A constant is a variable that can be changed at any time.

List two types of variables and explain their differences.

• Independent variables and dependent variables

• Control variables and random variables

• Discrete variables and continuous variables

• Qualitative variables and quantitative variables

What are literals and how are they used in programming?

• Literals are only used for variable declarations.

• Literals are a type of programming function.

• Literals are fixed values used in programming to represent data, such as numbers, strings, and booleans.

• Literals can change their value during program execution.

Define primitive data types and give two examples.

• Two examples of primitive data types are: 1. Integer 2. Boolean

• Character

• Float

• String

What is the difference between an integer and a float?

• An integer is a whole number; a float is a number that can have decimals.

• Integers are always negative; floats are always positive.

• An integer is a type of float with no decimals.

• An integer can be a decimal; a float cannot.

Explain what composite data types are with an example.

• An example of a composite data type is an 'int' in C, which holds a single integer value.

• An example of a composite data type is a 'struct' in C, which can hold multiple data types, such as int, float, and char.

• An example of a composite data type is a 'float' in C, which can only store decimal numbers.

• A composite data type is a simple data type like 'char' that cannot hold multiple values.

How do constants improve code readability?

• Constants are unnecessary if variables are used.

• Constants make code more understandable and maintainable by replacing hard-coded values with descriptive names.

• Constants are only used for mathematical calculations.

• Constants can make code slower due to extra memory usage.

What is a variable's scope and why is it important?

• A variable's scope is the type of data it can hold.

• A variable's scope is the context in which it is defined and accessible, and it is important for managing variable visibility and preventing conflicts.

• A variable's scope is the speed at which it executes.

• A variable's scope is the amount of memory it occupies.

Give an example of a string literal and explain its significance.

• "Hello, World!" with a typo

• 'Hello World'

• 'Hello, World!' in a different language

• "Hello, World!"

What are the advantages of using data types in programming?

• Reduced compatibility with different programming languages

• Advantages of using data types include type safety, improved code readability, better memory management, and enhanced performance.

• Increased complexity in code management

• Limited functionality in data processing