IDBI Intech Limited Team Lead Operations Interview Questions and Answers

I was asked 2 programming questions.

Q1. Scenario based question. What if someone creates new user with 1st name and last name but backend developer forgot to write code to store last name. How will data be corrected.
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Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions on Core Java concepts.

Q1. What are the primitive data types in Java?
Ans. 
Primitive data types in Java are basic data types that are not objects.
• Primitive data types include int, double, float, char, boolean, byte, short, and long.

• Examples: int num = 10; double price = 19.99; char letter = 'A'; boolean flag = true;
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Q2. What is the JVM?
Ans. 
JVM stands for Java Virtual Machine, it is an abstract computing machine that enables a computer to run Java programs.
• JVM is responsible for converting Java bytecode into machine code that can be executed by the computer's processor.

• It provides a platform-independent execution environment for Java programs.

• JVM manages memory, handles garbage collection, and provides security features for Java applications.

• Examples of J...read more
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Q3. Why is Java considered an object-oriented language?
Ans. 
Java is considered object-oriented because it supports the four main principles of OOP: encapsulation, inheritance, polymorphism, and abstraction.
• Java allows for the creation of classes and objects, which encapsulate data and behavior together.

• Inheritance is supported in Java, allowing classes to inherit attributes and methods from other classes.

• Polymorphism in Java allows objects to be treated as instances of their pa...read more
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Q4. What is JIT in Java?
Ans. 
JIT stands for Just-In-Time compiler in Java, which compiles Java bytecode into native machine code at runtime.
• JIT compiler improves the performance of Java applications by compiling bytecode into native machine code on-the-fly.

• It identifies and optimizes frequently executed code paths, resulting in faster execution.

• JIT compiler is a part of Java Virtual Machine (JVM) and helps in achieving high performance without the...read more
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Q1. First round was telephonic of 20 mins. They asked me about OOPS Concepts, Core java and collections. It was easy .
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Q2. Throw and throws Diff Heap and stack Diff Arraylist and linkedlist Diff Why string is immutable in Java OOPS 4 pillars
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Q1. This was 2nd Technical round(final round) . He asked me about my experience and technical skills. 1.Concurrenthashmap and hashtable 2.Internal working of concurrenthashmap 3.Comparable and Comparator Diff...read more
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Q1. Java 8 features
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Q2. Junit code writing
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Q1. Reason for job change
Ans. 
Seeking new challenges and growth opportunities in a dynamic environment.
• Desire for professional growth

• Seeking new challenges

• Interested in a more dynamic work environment
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Q2. Past experience
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Q1. Count duplicate from int array
Ans. 
Count duplicates in an int array
• Create a HashMap to store the count of each element in the array

• Iterate through the array and update the count in the HashMap

• Count the elements with count greater than 1 as duplicates
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Q1. Program to concat first name and last name and print character and occurance
Ans. 
Program to concatenate first name and last name and print character and occurrence
• Create a function that takes an array of strings as input

• Concatenate the first name and last name for each string in the array

• Count the occurrence of each character in the concatenated string

• Print the character and its occurrence
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Q1. Opps concepts hibernate
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Q2. Comparator comparable , spring boot
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