Java - Language Fundamentals Questions and Answers

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Java Language Fundamentals questions with answers are essential for mastering the building blocks of Java programming. This includes topics like data types, operators, arrays, and control structures. Practicing programming questions and answers with explanations enables students to improve coding accuracy and logical reasoning. These Java MCQs are widely asked in technical interviews and online coding assessments conducted by companies like Infosys, TCS, and Capgemini. Reviewing Java aptitude questions with solutions PDF helps solidify your understanding of syntax and execution flow for placement and certification exams.

Java - Language Fundamentals

Showing 10 of 39 questions

31. Which feature makes Java platform independent?

  • Object-oriented nature
  • Use of pointers
  • Explanation: Java bytecode runs on any JVM, making it platform independent.
  • Multithreading
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32. What will be the output of System.out.println(10 + 20 + "Java");?

  • Java30
  • 1020Java
  • Explanation: Integer addition occurs before string concatenation.
  • Java1020
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33. Which of the following is a valid array declaration?

  • int arr[];
  • int[] arr;
  • arr int[];
  • Explanation: Both array declaration styles are valid in Java.
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34. Which keyword refers to the current object in Java?

  • Explanation: this refers to the current object instance.
  • super
  • current
  • self
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35. Which literal represents a long data type?

  • 100
  • Explanation: L suffix indicates a long literal.
  • 100.0
  • '100'
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36. Which keyword prevents a method from being overridden?

  • static
  • private
  • Explanation: final methods cannot be overridden.
  • abstract
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37. Which class is commonly used to take input from the keyboard?

  • System
  • Explanation: Scanner is widely used for user input.
  • BufferedReader
  • InputStream
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38. Which of the following is NOT a valid Java keyword?

  • volatile
  • transient
  • strictfp
  • Explanation: Java does not support the unsigned keyword.
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39. Which of the following best describes Java?

  • Procedure-oriented
  • Platform dependent
  • Explanation: Java follows object-oriented programming principles.
  • Machine dependent
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