Find Interview Questions for Top Companies
Ques:- State true or falseCan we retrieve a whole row of data at once, instead of calling an individual ResultSet.getXXX method for each column ?
Asked In :- ZF Group, aspire systems,
Right Answer:
True.
Ques:- How does the race condition occur?
Asked In :- zemoso technologies,
Right Answer:
A race condition occurs when two or more threads or processes access shared data simultaneously, and at least one of them modifies the data. This can lead to unpredictable results because the final outcome depends on the timing of the thread execution.
Ques:- I m sending my data frm one page. The second page process it & saves to database and display message like DATA SAVED on same page(second). If I refresh the browser the same query re-execute & again same data store. How Can I check this(I meanwithout using sendredirect to another page)
Ques:- What are the differences between Java & C++ in terms of its features?
Asked In :- axiomsl, plintron, etg, binance,
Right Answer:
1. **Memory Management**: Java has automatic garbage collection, while C++ requires manual memory management using pointers.
2. **Platform Independence**: Java is platform-independent due to the Java Virtual Machine (JVM), whereas C++ is platform-dependent and compiled to machine code.
3. **Syntax**: Java has a simpler syntax and does not support operator overloading, while C++ allows operator overloading and has more complex syntax.
4. **Multiple Inheritance**: Java does not support multiple inheritance directly (uses interfaces instead), while C++ supports multiple inheritance.
5. **Exception Handling**: Java has a robust built-in exception handling mechanism, while C++ has a less structured approach.
6. **Pointers**: Java does not support pointers for security reasons, while C++ allows direct pointer manipulation.
7. **Performance**: C++ generally offers better performance due to direct compilation to machine code, while Java may be slower due to the JVM overhead.
Ques:- What is Ant tool and use of this tool?
Right Answer:
Ant is a Java-based build tool used for automating the process of software build, deployment, and management. It uses XML files to define build scripts, allowing developers to compile code, package binaries, run tests, and manage dependencies efficiently.
Ques:- What version of JBoss AS do I need to run Seam?
Asked In :- bjss,
Ques:- Which of the following statement is false regarding the exceptions in JDBC
Right Answer:
The false statement regarding exceptions in JDBC is: "JDBC exceptions are checked exceptions."
Comments
DK BOSS Jul 17, 2021

The question is not completed.

Which of the following statement is false regarding the exceptions in JDBC
A) SQLWarning objects are a subclass of SQLException that deal with database access warnings
B) Warnings stop the execution of an application, as exceptions do; they simply alert the user that something did not happen as planned
C) Connection object has a getWarning() method in it.
D) Statement and ResultSet objects have getWarning() methods in it.
Explanation: warning does not stop the execution of the program.

answer

B) Warnings stop the execution of an application, as exceptions do; they simply alert the user that something did not happen as planned

Ques:- What's causing ClassFormatErrors with my applet?
Asked In :-
Right Answer:
ClassFormatErrors in an applet can be caused by several issues, including:

1. Corrupted or incomplete class files.
2. Using a class file compiled with a different version of Java than the one running the applet.
3. Class files containing invalid bytecode.
4. Class files that are not properly loaded due to security restrictions or classpath issues.

Check the class files for corruption, ensure compatibility with the Java version, and verify the classpath settings.
Ques:- How many times instantiation phase executed in Servlets?Explain briefly.
Asked In :- monocept,
Right Answer:
The instantiation phase of a servlet is executed only once, when the servlet is first loaded into memory by the servlet container.


The Java skill section on takluu.com is designed for freshers, intermediate developers, and experienced professionals aiming to crack Java-based technical interviews with confidence. Java remains one of the most in-demand programming languages, and mastering it opens the door to countless opportunities in backend development, enterprise solutions, Android apps, and cloud-based platforms.

Our Java category covers everything from Core Java concepts like OOPs (Object-Oriented Programming), Data Types, Loops, and Exception Handling to Advanced Java topics including Collections Framework, Multithreading, JDBC, Servlets, JSP, Lambda Expressions, and Streams. We provide practical coding examples, real interview questions (with answers), and key concept explanations that interviewers commonly test.

Whether you’re applying for a role like Java Developer, Backend Engineer, or Full Stack Developer, this section ensures you understand the logic, syntax, and problem-solving approaches that matter in real-world interviews. You’ll also find scenario-based questions and discussions around design patterns, JVM internals, garbage collection, and performance tuning — areas often explored in senior-level interviews.

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