What is a compiler in Compiler Design - Practice Questions & Exercises

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding the Basic Role of a Compiler

What is the primary function of a compiler in computer programming?

A It translates source code written in a high-level language into machine code that a computer can execute.

B It executes the source code line by line without translating it.

C It stores data temporarily during program execution.

D It manages the computer's hardware resources directly.

💡 Hint

Think about how a program written by a human becomes understandable by a computer.

A compiler converts the entire source code into machine code before execution, enabling the computer to run the program efficiently.

📋 Factual

intermediate

Identifying Compiler Output

What is the typical output produced by a compiler after processing source code?

A A list of syntax errors only.

B A runtime log of program execution.

C A human-readable script file.

D An executable machine code file.

💡 Hint

Consider what you run on your computer after compiling a program.

The compiler produces an executable file containing machine code that the computer can run directly.

🔍 Analysis

advanced

Difference Between Compiler and Interpreter

Which statement correctly explains a key difference between a compiler and an interpreter?

A A compiler only checks syntax, while an interpreter runs the program.

B A compiler executes code directly without translation, while an interpreter translates code into machine language.

C A compiler translates the entire program before execution, while an interpreter translates and executes code line by line.

D A compiler is used for scripting languages, while an interpreter is used for compiled languages.

💡 Hint

Think about when the translation happens in each case.

Compilers translate the whole program into machine code before running it, whereas interpreters translate and run code one line at a time.

❓ Reasoning

advanced

Why Use a Compiler?

Why might a programmer choose to use a compiler instead of an interpreter?

A Because compiled programs generally run faster than interpreted ones.

B Because compilers allow programs to be changed during execution.

C Because interpreters produce machine code files for distribution.

D Because compilers execute code line by line for easier debugging.

💡 Hint

Consider the performance difference between compiled and interpreted programs.

Compiled programs run faster because the translation to machine code happens once before execution, avoiding repeated translation during runtime.

❓ Comparison

expert

Stages of Compilation Process

Which of the following correctly orders the main stages of a compiler?

A 3,2,1,4

B 1,2,3,4

C 1,3,2,4

D 2,1,3,4

💡 Hint

Think about how the compiler processes code from raw text to machine instructions step by step.

The compiler first breaks code into tokens (lexical), then checks structure (syntax), then meaning (semantic), and finally creates machine code (code generation).