Home > Information Technology > Programming Languages > Java Syntax and Basic Concepts
25 QuestionsLog inwatch on youtube 
00:00:00

ЁЯОБ Claim Rewards

ЁЯОБ Login to earn rewards !!!


25 uniquely designed questions just for you to evaluate your skills in Java Syntax and Basic Concepts quiz. Are you ready to challenge yourself and explore more? Let's get started and see how much you can score out of 25.

Challenge yourself with our Java Syntax and Basic Concepts quiz. Test your understanding of Java data types, operators, control structures, classes, keywords, and more. Enhance your Java programming skills with this quiz

Please feel free to report any corrections if you come across any inaccuracies or errors. Your feedback is valuable in maintaining the accuracy of our content.

Questions

1. What is Java?
Answer: A programming language
Explanation: Java is a high-level, object-oriented programming language.Report for correction
2. Which of the following is not a valid Java data type?
Answer: char@
Explanation: char@ is not a valid Java data type. The correct data type is char.Report for correction
3. What is the entry point of a Java program?
Answer: main()
Explanation: The main() method is the entry point of a Java program.Report for correction
4. Which of the following is used to declare a variable in Java?
Answer: int
Explanation: In Java, you use a data type (e.g., int) to declare a variable.Report for correction
5. What is the correct way to create an instance of a class in Java?
Answer: new Class()
Explanation: To create an instance of a class in Java, you use the new keyword followed by the class name and parentheses.Report for correction
6. What is the Java operator for addition?
Answer: +
Explanation: The + operator is used for addition in Java.Report for correction
7. How do you comment a single-line in Java?
Answer: // This is a comment
Explanation: In Java, single-line comments are created using //.Report for correction
8. Which of the following is not a valid Java keyword?
Answer: main
Explanation: While main is commonly used as the entry point method, it is not a reserved keyword in Java.Report for correction
9. What does the public keyword indicate in a Java class?
Answer: The class can be accessed from any package
Explanation: The public keyword in Java indicates that the class is accessible from any package.Report for correction
10. Which Java statement is used to exit a loop prematurely?
Answer: break
Explanation: The break statement is used to exit a loop prematurely in Java.Report for correction
11. What is the result of 9 % 4 in Java?
Answer: 1
Explanation: The % operator in Java calculates the remainder, so 9 % 4 results in 1.Report for correction
12. Which of the following is a valid way to declare a constant in Java?
Answer: final int x = 10;
Explanation: In Java, constants are declared using the final keyword before the data type.Report for correction
13. What is the purpose of the static keyword in Java?
Answer: It indicates a method that can be called on the class itself, rather than on an instance
Explanation: The static keyword in Java is used to define methods or variables that are associated with the class rather than with instances of the class.Report for correction
14. What is the result of the expression true && false in Java?
Answer: false
Explanation: The && operator in Java represents the logical AND operation, and the result is false if any of the operands is false.Report for correction
15. What is the Java keyword for defining a subclass of a class?
Answer: extends
Explanation: The extends keyword is used to define a subclass of a class in Java.Report for correction
16. Which of the following is a valid Java array declaration?
Answer: int[] numbers = new int[3];
Explanation: In Java, you declare an array using the new keyword and specify the size in square brackets.Report for correction
17. What is the result of "Hello" + "World" in Java?
Answer: HelloWorld
Explanation: In Java, the + operator is used for concatenating strings.Report for correction
18. What is the default value for an uninitialized int variable in Java?
Answer: 0
Explanation: Uninitialized int variables in Java have a default value of 0.Report for correction
19. Which Java access modifier allows a member to be accessed only within its own class?
Answer: private
Explanation: The private access modifier restricts access to members only within the same class.Report for correction
20. What is the purpose of the this keyword in Java?
Answer: It refers to the current instance of the class
Explanation: The this keyword in Java is used to refer to the current instance of the class.Report for correction
21. Which Java loop is used when you want to execute a block of code at least once?
Answer: do-while loop
Explanation: The do-while loop in Java is used when you want to execute a block of code at least once, as the condition is checked after the loop body.Report for correction
22. What is the role of the default case in a switch statement?
Answer: It is executed when none of the cases match
Explanation: The default case in a switch statement is executed when none of the other cases match the provided value.Report for correction
23. Which Java keyword is used for method overriding?
Answer: @Override
Explanation: The @Override annotation is used in Java to indicate that a method is intended to override a method from its superclass.Report for correction
24. What is the purpose of the super keyword in Java?
Answer: It calls a method from the superclass
Explanation: The super keyword in Java is used to call a method or access a member from the superclass.Report for correction
25. Which Java package contains classes for input and output operations?
Answer: java.io
Explanation: The java.io package in Java contains classes for input and output operations, such as reading and writing files.Report for correction






"Hardships often prepare ordinary people for an extraordinary destiny."