Solution:Step 1: Analyze static block logicThe block reads an environment variable and assigns a default if null.Step 2: Understand static block timingThis runs once at class load, ensuring env is set before use.Final Answer:To set a default environment if none is provided externally -> Option BQui

[Solved] Consider this code:class Config { static String env; static { env = System.getenv("APP_ENV"); if (env == null) env = "dev"; } }What is the purpose of the static block here? | Java

Java - Static Keyword

Consider this code:

class Config {
  static String env;
  static {
    env = System.getenv("APP_ENV");
    if (env == null) env = "dev";
  }
}

What is the purpose of the static block here?

ATo delay environment variable reading until object creation

BTo set a default environment if none is provided externally

CTo allow multiple environment variables to be set later

DTo prevent environment variable from being changed

Step-by-Step Solution

Solution:

Step 1: Analyze static block logic
The block reads an environment variable and assigns a default if null.
Step 2: Understand static block timing
This runs once at class load, ensuring env is set before use.
Final Answer:
To set a default environment if none is provided externally -> Option B
Quick Check:
Static block sets default static variable values [OK]

Quick Trick: Use static blocks to set defaults for static variables [OK]

Common Mistakes:

Thinking static block runs on object creation
Assuming environment variable can be changed later
Confusing static block with instance initializer

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Consider this code:

Step 1: Analyze static block logic

Step 2: Understand static block timing

Final Answer:

Quick Check:

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