L&T Construction Senior Java Developer Interview Questions and Answers

Easy not much hard. Basic questions

Dsa is must, logical questions are asked

Q1. How to declare object in js
Ans. 
To declare an object in JavaScript, you can use the 'let' or 'const' keyword followed by the object name and curly braces {}.
• Use 'let' or 'const' keyword to declare the object

• Followed by the object name and curly braces {}

• Example: let person = {};
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Test was hard, needs to prepared very well

Proficient in C#, jQuery, and MySQL.

Q1. Explain Spring boot flow
Ans. 
Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured templates and dependencies.
• Spring Boot uses an embedded server to run the application

• It provides auto-configuration of dependencies

• It uses annotations to configure the application

• It supports various data sources and web frameworks

• It simplifies the deployment process
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Q2. What is difference between error and exception?
Ans. 
Errors are unrecoverable, while exceptions can be handled.
• Errors are caused by the environment or JVM, while exceptions are caused by the application code.

• Errors cannot be handled, while exceptions can be caught and handled using try-catch blocks.

• Examples of errors include OutOfMemoryError and StackOverflowError, while examples of exceptions include NullPointerException and ArrayIndexOutOfBoundsException.
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Round duration - 60 minutes
Round difficulty - Easy

This was a technical interview round with questions on C, C++ and Windows.

Q1. What is the difference between C and C++?
Ans. 
1. The C programming language is a procedural language type while C++ is an object-oriented programming language type.
2. C programming follows a top to down programming approach that focuses on the steps rather than the data. C++ follows a bottom-to-top approach that focuses on data rather than the overall procedure.
3. Since C is a structured programming language the program is divided into separate blocks known as fun...read more
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Q2. What are access specifiers in C++?
Ans. 
An access specifier is used to implement the principle of information hiding. This principle states that irrelevant and sensitive information should be kept hidden, as much as possible, outside of a class.
The three access specifiers in C++, in ascending order of accessibility, are:

1. private
All private variables and functions can only be accessed from inside the class or friend class. When no specifier is written, the ...read more
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Q3. How do you open Device Manager in Windows?
Ans. 
Device Manager is accessible in Control Panel. 
First, open Control Panel by clicking the “Start” menu, typing “control panel,” and clicking the “Control Panel” icon. In Control Panel, click the “Hardware and Sound” category, then select “Device Manager.”
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Q4. How do you open the command prompt in Windows?
Ans. 
Click the Windows Start Button.
In the search box type cmd.
In the search results, Right-Click on cmd and select Run as administrator 
This will open the Command Prompt window 
To change to the Root directory type cd\ and hit Enter
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Round duration - 30 minutes
Round difficulty - Easy

HR interview can be a bit tricky. They will try to see your creativity in your answers so just be yourself and be confident.