C Language Final Exam Review: Key Points and Question Bank

The final exam is approaching. How is everyone’s review going? Do you feel overwhelmed by the numerous knowledge points? Don’t panic; keep a clear mindset, and studying is the way to go! This article is tailored for C language learners, covering key points and a question bank for the final exam! Quickly bookmark this “ultimate guide” to help you through a worry-free exam season!

Part One: Summary of Basic Knowledge Points in C Language

The key to effective review is to firmly grasp the fundamental concepts. Below are the basic knowledge points in C language that are frequently tested in final exams:

1. Basic Structure of a C Language Program

1. A program written in C language is called a “source program,” also known as a “compilation unit.”
2. The writing format of C language is very flexible—multiple statements can be written in one line, or a single statement can be split across multiple lines.
3. A C language program must have exactly one main function, as it is the starting point of program execution.

2. Program Execution Flow in VC++

1. **VC++** is a commonly used Integrated Development Environment (IDE) for writing and running C language programs.
2. The basic flow of program execution: Compile (.c) → Link (.obj) → **Generate Executable File (.exe)**. Note that .c and .obj files cannot be run directly; only the final .exe can be used! (This is a common testing point!)

3. Identifiers and Valid Naming

1. Identifiers (high-frequency in exams): Valid identifiers consist of letters, digits, and underscores, where the first character must be a letter or underscore, and cannot be a digit; other characters are not allowed.
2. Classification of identifiers:

• Keywords: Cannot be used as user-defined identifiers. For example, int and float are keywords.
• Predefined Identifiers: Such as printf, scanf, define, which can be redefined but may lead to errors if not used cautiously.
• User Identifiers: Defined by programmers for naming variables, functions, etc.
• Easily Confused Points: If (with uppercase first letter) is a valid identifier name, but if (all lowercase) is a keyword!

4. Common Number Systems and Conversions

In the final exam, converting between number systems is a headache but an unavoidable focus:

1. Decimal → Binary, Octal, Hexadecimal: Use the division-remainder method, dividing the integer part step by step by the target base, and collecting the remainders.
2. Binary → Decimal: Expand each digit according to its weight and sum them up.
3. Quick Memorization of Knowledge Points:

• Binary: Begins with 0b or 0B.
• Octal: Begins with 0.
• Hexadecimal: Begins with 0x or 0X (note case sensitivity).

5. Data Types and Variables

Review Focus: Size and Value Range of Basic Data Types—int, float, char, and double, with specific sizes depending on the compiler.

Part Two: Selected Questions from the Final Exam Question Bank

Is reviewing theoretical knowledge not enough for you? No worries, here’s a carefully selected question bank for the final exam! Let’s try a few questions for practice.

True or False Questions

1. C language requires that each line of the program must contain one statement. (×)

• Explanation: The writing format of C language is flexible; multiple statements can be written in one line.

2. Identifiers can contain letters, uppercase letters, underscores, digits, and the first character can be a digit. (×)

• Explanation: The first character must be a letter or underscore, and cannot be a digit.

Multiple Choice Questions

1. Which of the following options is a keyword in C language?

• A. scanf
• B. printf
• C. if
• D. Define Answer: C. Explanation: if is a keyword, while the others are predefined identifiers.

2. In C language, what is the main role of the main function?

• A. Express the structure of the program
• B. Indicate the starting point of the program
• C. Display information
• D. Declare variables Answer: B. Explanation: The main function is the starting point of a C language program, where execution begins.

Part Three: Appendices and Resource Display

Here are some visual resource screenshots to make the review clearer:

Conclusion: Learning C language is not difficult, but it is essential to have a method. Master the fundamental knowledge, practice the key points frequently, and closely follow the textbook—this is the “three-pronged approach” to tackle the finals. I hope this article can effectively reduce your study pressure! Quickly bookmark this review material, calm down, and study well; you can ace the final exam with ease!

Wishing everyone good results in the final exam~~~