Go Fundamentals

What is the primary purpose of the package main declaration?

• AIt identifies the code as belonging to the main package — the required starting point for an executable program
• BIt imports all standard library packages so they can be used throughout the program
• CIt marks the file as the project's configuration file that controls build settings
• DIt tells the compiler to apply production-level optimizations when building the binary

What is the difference between an integer and a real number in Go?

• AIntegers are whole numbers, real numbers (floating-point) have fractional parts — Go won't mix them without explicit conversion
• BIntegers are stored on the heap while real numbers are placed on the stack for faster access
• CReal numbers can only be declared with const, because their precision must be fixed at compile time
• DThere is no difference — Go converts between integers and floats automatically whenever needed

What is the syntax for declaring a basic function in Go?

• AThe func keyword, followed by the name, parentheses for parameters, and curly braces for the body
• BThe function keyword, followed by the name, a colon, and the parameter list in angle brackets
• CThe def keyword, followed by the name and an indented body block without any braces
• DThe fn keyword, followed by the name and an arrow pointing to the return type and body

How does Go handle errors without the use of exceptions?

• AFunctions return an error value as a result, which the caller must explicitly check
• BErrors are caught with try/catch blocks that wrap the code that might fail
• CThe runtime silently logs errors to standard error and continues execution normally
• DAll errors immediately terminate the program with a non-zero exit code and stack trace