Java Fundamentals Quiz
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Questions and Answers

What is the return type of the equals() method in the String class?

  • char
  • All of the mentioned
  • boolean (correct)
  • int

    • What will be the output of the given Java program?

  • Compile error
  • Runtime error
  • Not Equal (correct)
  • Equal

    • What type of exception is ArithmeticException in Java?

  • Built-in exception class
  • Unchecked exception (correct)
  • Checked exception
  • Custom exception

    • Which keyword is used to implement an interface in Java?

    <p>IMPLEMENTS</p> Signup and view all the answers

    Which package is automatically imported in a Java program?

    <p>java.lang</p> Signup and view all the answers

    Which of the following is a checked exception in Java?

    <p>IOException</p> Signup and view all the answers

    What is a package in Java?

    <p>All of the above</p> Signup and view all the answers

    What will happen if a NullPointerException is thrown in the following code?

    <p>A runtime exception is thrown and the program crashes</p> Signup and view all the answers

    What is the purpose of the catch block in the following code?

    <p>To handle ArithmeticException</p> Signup and view all the answers

    How can a custom exception be created in Java?

    <p>All of the above</p> Signup and view all the answers

    What is the difference between a process and a thread?

    <p>A thread is a part of a process</p> Signup and view all the answers

    What will be the output of the following code?

    <p>ArithmeticException caught</p> Signup and view all the answers

    What is a key difference between a process and a thread?

    <p>A thread is a unit of execution that shares memory and resources with other threads in the same process</p> Signup and view all the answers

    What is the output of the following code? String str = 'Hello'; str.replace('H', 'J'); System.out.println(str);

    <p>Hello</p> Signup and view all the answers

    What is true about interfaces in Java?

    <p>1, 2, 3, and 4</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a process?

    <p>It shares memory and resources with other processes.</p> Signup and view all the answers

    What is a characteristic of a thread?

    <p>It shares memory and resources with other threads.</p> Signup and view all the answers

    What is NOT a characteristic of an interface in Java?

    <p>An instance of an interface can be created.</p> Signup and view all the answers

    What is the purpose of setting the priority of a thread?

    <p>To set the priority of a thread</p> Signup and view all the answers

    What is the purpose of multiple catch clauses in Java?

    <p>To catch different types of exceptions in the same block</p> Signup and view all the answers

    What does 'java'.substring(1) return?

    <p>ava</p> Signup and view all the answers

    How can threads be synchronized in Java?

    <p>Using synchronized methods and synchronized block</p> Signup and view all the answers

    What is the difference between a checked and an unchecked exception in Java?

    <p>Checked exceptions must be caught or declared in the method signature, while unchecked exceptions do not have to be caught or declared</p> Signup and view all the answers

    Which method is used to create a new thread in Java?

    <p>start()</p> Signup and view all the answers

    What is the output of the program when the demo method is called?

    <p>ab cd ef gh ij kl ab cd</p> Signup and view all the answers

    What is the purpose of the Throwable class in Java?

    <p>To catch and handle exceptions</p> Signup and view all the answers

    What is the result of attempting to compile and run the program in Question 1?

    <p>false, true</p> Signup and view all the answers

    Which keyword is used to handle exceptions in Java?

    <p>all of the above</p> Signup and view all the answers

    What is the type of the array elements in the given program?

    <p>char</p> Signup and view all the answers

    What is the purpose of the split method in the given program?

    <p>To split a string into substrings</p> Signup and view all the answers

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