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Welcome to the java lang and java io MCQs Page

Dive deep into the fascinating world of java lang and java io with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of java lang and java io, a crucial aspect of Java Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of java lang and java io, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Java Programming.

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Check out the MCQs below to embark on an enriching journey through java lang and java io. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Java Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of java lang and java io. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

java lang and java io MCQs | Page 16 of 26

Q151.
Java system properties can be set at runtime.
Discuss
Answer: (a).True
Q152.
Which system property stores installation directory of JRE?
Discuss
Answer: (c).java.home
Q153.
What does System.getProperty(“variable”) return?
Discuss
Answer: (d).null
Discuss
Answer: (c).setProperties method changes the set of Java Properties which are not persistent
Q155.
How to use environment properties in the class?
Discuss
Answer: (d).@Autowired
Discuss
Answer: (a).@Value(“${my.property}”)
private String prop;
Q157.
Which environment variable is used to set java path?
Discuss
Answer: (b).JAVA_HOME
Discuss
Answer: (c).InputStream in =this.getClass().getResourceAsStream(“SomeTextFile.txt”);
Q159.
What is the output of this program?
    class Output 
    {
        public static void main(String args[]) 
        {
            Integer i = new Integer(257);  
            float x = i.floatValue();
            System.out.print(x);
        }
    }
Discuss
Answer: (d).257.0
Q160.
What is the output of this program?
    class Output 
    {
        public static void main(String args[]) 
        {
            Long i = new Long(256);  
            System.out.print(i.hashCode());
        }
    }
Discuss
Answer: (a).256

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