{"id":25515762,"date":"2022-03-14T20:23:04","date_gmt":"2022-03-14T14:53:04","guid":{"rendered":"https:\/\/entri.app\/blog\/?p=25515762"},"modified":"2023-11-13T14:01:44","modified_gmt":"2023-11-13T08:31:44","slug":"java-programming-mcq-questions-and-answers-pdf","status":"publish","type":"post","link":"https:\/\/entri.app\/blog\/java-programming-mcq-questions-and-answers-pdf\/","title":{"rendered":"Java Programming MCQ Questions and Answers PDF 2023"},"content":{"rendered":"

Java is one of the most popular programming language \u200b\u200band platform. Java is fast, reliable and secure.\u00a0<\/span><\/p>\n

Java is a high level, robust, object-oriented and secure programming language. Java was originally developed by Sun Microsystems<\/em>\u00a0(which is now the subsidiary of Oracle) in the year 1995.\u00a0James Gosling<\/em>\u00a0is known as the father of Java. Before Java, its name was\u00a0Oak<\/em>. Since Oak was already a registered company, so James Gosling and his team changed the name from Oak to Java.<\/p>\n

\"\"<\/a><\/p>\n

As of September 2023, Java 19 is the latest version, while Java 17, 11 and 8 are the current long-term support (LTS) versions.<\/p>\n

MCQs for Java Programming – Questions and Answers<\/strong><\/span><\/h2>\n

1. Who founded Java Programming?<\/strong><\/p>\n

a) Guido van Rossum
\n<\/span>b) James Gosling
\n<\/span>c) Dennis Ritchie
\n<\/span>d) Bjarne Stroustrup<\/span><\/p>\n

Answer: b<\/strong><\/div>\n
Solution:<\/strong> The Java program was developed by James Gosling at Sun Microsystems in 1995. James Gosling is\u00a0 known as the father of Java.<\/span><\/div>\n

2. What part is used to compile, debug and execute java programs?<\/strong><\/p>\n

a) JRE
\n<\/span>b) JIT
\n<\/span>c) JDK
\n<\/span>d) JVM<\/span><\/p>\n

Answer: c<\/strong><\/div>\n
Solution:<\/strong> JDK is an integral part of the Java Area and provides all the tools, binary needed to integrate, debug and launch the Java Program.<\/span><\/div>\n

3. What difference does it make when java is out of memory?<\/strong><\/p>\n

a) MemoryError
\n<\/span>b) OutOfMemoryError
\n<\/span>c) MemoryOutOfBoundsException
\n<\/span>d) MemoryFullException<\/span><\/p>\n

Answer: b<\/strong><\/div>\n
\n
Solution:<\/strong> The Xms flag has no default value, and Xmx typically has a default value of 256MB. A common use of these flags is when you encounter java.lang.OutOfMemoryError.<\/span><\/div>\n<\/div>\n

 <\/p>\n

4. Which of these selection statements in Java do you have?<\/strong><\/p>\n

a) a break
\n<\/span>b) continue
\n<\/span>c) for ()
\n<\/span>d) if ()<\/span><\/p>\n

Answer: d<\/strong><\/div>\n
\n
Solution:<\/strong> Continue and break comes under the jump statements, and for falls under the looping statement.<\/span><\/div>\n<\/div>\n

5. Which of these keywords is used to define interfaces in Java?<\/strong><\/p>\n

a) intf
\n<\/span>b) Intf
\n<\/span>c) interface
\n<\/span>d) Interface<\/span><\/p>\n

Answer: c<\/strong><\/div>\n
Solution:<\/strong> interface keyword is used to define interfaces in Java.<\/span><\/div>\n

6. Which of the following is the superclass of all Java classes?<\/strong><\/p>\n

a) Array List
\n<\/span>b) Abstract Class
\n<\/span>c) Object class
\n<\/span>d) String<\/span><\/p>\n

Answer: c<\/strong><\/div>\n
Definition:<\/strong> The object class is the superclass of all Java classes.<\/span><\/div>\n

7. Which of the following is not a Java Profiler?<\/strong><\/p>\n

a) JProfiler
\n<\/span>b) Eclipse Profile
\n<\/span>c) JVM
\n<\/span>d) JConsole<\/span><\/p>\n

Answer: c<\/strong><\/div>\n
Solution:<\/strong> A leak in memory is like holding a solid reference in an object though it will no longer be needed. Accessible but inanimate objects are considered memory leaks. Various tools help us to detect memory loss.<\/span><\/div>\n

8. Which of these packages contains the stack overflow variant in Java?<\/strong><\/p>\n

a) java.io
\n<\/span>b) java.system
\n<\/span>c) java.lang
\n<\/span>d) java.util<\/span><\/p>\n

Answer: c<\/strong><\/div>\n
Definition<\/strong>: java.lang packages contains the stack overflow variant in Java<\/span><\/div>\n

9. Which of these statements are wrong about Thread?<\/strong><\/p>\n

a) start () method is used to start a thread function
\n<\/span>b) run () method is used to start a thread process before start the () method in special cases
\n<\/span>c) The thread can be created using only the runnable interface
\n<\/span>d) The thread can be made of a class that extends to the Thread class<\/span><\/p>\n

Answer: b<\/strong><\/div>\n
Solution:<\/strong> The run () method used to define a code that forms a new string, contains the code to be used. start () method is used to start the release of the running series (). run () itself has never been used for series implementation.<\/span><\/div>\n

10. Which of these keywords is used to block an exception?<\/strong><\/p>\n

a) check
\n<\/span>b) throw
\n<\/span>c) catch
\n<\/span>d) try<\/span><\/p>\n

Answer: d<\/strong><\/div>\n
Solution:<\/strong> a try is applied to a block that needs to be checked to be different<\/span><\/div>\n\n\n\n\n
\n
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11. Which of the following is not an access modifier?<\/strong><\/p>\n

a) Protected
\n<\/span>b) Void
\n<\/span>c) Public
\n<\/span>d) Confidential<\/span><\/p>\n

Answer: b<\/strong><\/div>\n
Solution:<\/strong> Public, private, protected and default by all access controllers.<\/span><\/div>\n

12. What is the range for the type of char data in Java?<\/strong><\/p>\n

a) 0 to 256
\n<\/span>b) -128 to 127
\n<\/span>c) 0 to 65535
\n<\/span>d) 0 to 32767<\/span><\/p>\n

Answer: c<\/strong><\/div>\n
Solution:<\/strong> Char takes 16-bit memory, so it supports 216, that is from 0 to 65535.<\/span><\/div>\n

13. Which section provides for the implementation of the private server side of the system?<\/strong><\/p>\n

a) Server
\n<\/span>b) ServerReader
\n<\/span>c) Socket
\n<\/span>d) ServerSocket<\/span><\/p>\n

Answer: d<\/strong><\/div>\n
Solution:<\/strong> ServerSocket is a component of java.net that provides a standalone system launcher for a third party socket server connection.<\/span><\/div>\n

14. \u200b\u200bWhich of the following is true of servers?<\/strong><\/p>\n

a) Resources can use the full functionality of Java class libraries
\n<\/span>b) The resources operate within the web server’s domain, private domain and use the functionality of the java category libraries
\n<\/span>c) Applications run within the web server address area
\n<\/span>d) The servlets are independent in one place because they are labeled with java<\/span><\/p>\n

Answer: b<\/strong><\/div>\n
Solution:<\/strong> Applications run within the web server address area. As it is written in java independent. Full functionality is available through libraries.<\/span><\/div>\n

15. What is the expansion of the compiled java classes?<\/strong><\/p>\n

a) .txt
\n<\/span>b) .js
\n<\/span>c) .class
\n<\/span>d) .java<\/span><\/p>\n

Answer: c<\/strong><\/div>\n
Solution:<\/strong> A compact java file with the extension .class.<\/span><\/div>\n
\n

16. Arrays in java are-<\/p>\n

a. Object References
\nb. Objects
\nc. Primitive Data type
\nd. None<\/p>\n

Answer: b. Objects<\/strong><\/div>\n
Solution: Arrays are objects in java. It is a container that holds a fixed number of items of a single type.<\/strong><\/div>\n
\n

17. Total constructor string class have?<\/strong><\/p>\n

a. 3
\nb. 7
\nc. 13
\nd. 20<\/p>\n

Answer: 13<\/strong><\/div>\n
Solution: String class has 13 constructors.<\/strong><\/div>\n

18. Where does the system stores parameters and local variables whenever a method is invoked?<\/strong><\/p>\n<\/div>\n

a. Heap
\nb. Stack
\nc. Array
\nd. Tree<\/p>\n
Answer: b. Stack<\/strong><\/div>\n
Solution: The system stores parameters and local variables in a stack.<\/strong><\/div>\n<\/div>\n

19. When is the finalize() method called?<\/strong><\/p>\n

a. Before Garbage Collection
\nb. Before an object goes out of scope
\nc. Before a variable goes out of scope
\nd. None<\/p>\n<\/div>\n

\n
Answer: a. Before Garbage Collection<\/strong><\/div>\n
\n
Solution: finalize() method is called before garbage collection.<\/strong><\/div>\n
20. What is Runnable?<\/strong><\/div>\n
a. Abstract class
\nb. Interface
\nc. Class
\nd. Method<\/p>\n
Answer: b. Interface<\/strong><\/div>\n
Solution: Runnable is an interface.<\/strong><\/div>\n

Java Programming MCQ Questions and Answers – Download PDF\u00a0<\/strong><\/h3>\n

Click Here to download Java Programming MCQ Questions<\/a><\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n

Be it playing games, withdrawing money from ATMs, or shopping online or booking a plane ticket; Java code is helpful for all of these activities. Java is a strong and secure language and that is what makes it a favorite for developers to do such projects. Being able to write code in Java opens the door to many opportunities. So configure and try these projects to build your profile in Java.<\/span><\/p>\n

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Java is one of the most popular programming language \u200b\u200band platform. Java is fast, reliable and secure.\u00a0 Java is a high level, robust, object-oriented and secure programming language. Java was originally developed by Sun Microsystems\u00a0(which is now the subsidiary of Oracle) in the year 1995.\u00a0James Gosling\u00a0is known as the father of Java. Before Java, its […]<\/p>\n","protected":false},"author":99,"featured_media":25548850,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[802,1841,1882],"tags":[],"class_list":["post-25515762","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","category-entri-skilling","category-java-programming"],"acf":[],"yoast_head":"\nJava MCQ Questions and Answers PDF 2023 - Entri Blog<\/title>\n<meta name=\"description\" content=\"Here is the list of Java MCQ questions and answers to prepare better for the upcoming exams and interviews.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/entri.app\/blog\/java-programming-mcq-questions-and-answers-pdf\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java MCQ Questions and Answers PDF 2023 - 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