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| Section | Objectives |
|---|---|
| Topic 1: Concurrency and Multithreading | - Thread management
|
| Topic 2: Java Language Fundamentals | - Java syntax and language structure
|
| Topic 3: Advanced Java Features (Java SE 21) | - Modern language features
|
| Topic 4: Database Connectivity (JDBC) | - Database interaction
|
| Topic 5: Exception Handling and Debugging | - Error handling mechanisms
|
| Topic 6: Input/Output and File Handling | - NIO and file operations
|
| Topic 7: Object-Oriented Programming | - Core OOP principles
|
| Topic 8: Core APIs | - Java standard library usage
|
What do the following print?
java
public class Main {
int instanceVar = staticVar;
static int staticVar = 666;
public static void main(String args[]) {
System.out.printf("%d %d", new Main().instanceVar, staticVar);
}
static {
staticVar = 42;
}
}
Correct Answer: A 🗳️
Explanation: Only visible for Pass4guide members. You can sign-up / login (it's free).
A module com.eiffeltower.shop with the related sources in the src directory.
That module requires com.eiffeltower.membership, available in a JAR located in the lib directory.
What is the command to compile the module com.eiffeltower.shop?
Correct Answer: D 🗳️
Explanation: Only visible for Pass4guide members. You can sign-up / login (it's free).
Given:
java
public static void main(String[] args) {
try {
throw new IOException();
} catch (IOException e) {
throw new RuntimeException();
} finally {
throw new ArithmeticException();
}
}
What is the output?
Correct Answer: A 🗳️
Explanation: Only visible for Pass4guide members. You can sign-up / login (it's free).
Which of the following statements is correct about a final class?
Correct Answer: E 🗳️
Explanation: Only visible for Pass4guide members. You can sign-up / login (it's free).
Given:
java
Map<String, Integer> map = Map.of("b", 1, "a", 3, "c", 2);
TreeMap<String, Integer> treeMap = new TreeMap<>(map);
System.out.println(treeMap);
What is the output of the given code fragment?
Correct Answer: D 🗳️
Explanation: Only visible for Pass4guide members. You can sign-up / login (it's free).
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Viewing questions 1-5 out of 85 questions.
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