IBS Software Services Interview Questions and Answers

Q1. String Question based on hashmap
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Q2. Palindorme -Reverse a string
Ans. 
Reverse a string to check if it is a palindrome.
• Create a function that takes a string as input

• Reverse the string using built-in functions or manually

• Compare the reversed string with the original string to check if it is a palindrome
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Q1. Basic Personal Questions, salary expectations
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Q2. Agile, docker,kunernetes
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Easy Programming problem

Q1. What is probability of the ceiling fan falling?
Ans. 
The probability of a ceiling fan falling depends on various factors like installation, maintenance, and environmental conditions.
• Proper installation reduces the risk of falling; for example, using secure mounts.

• Regular maintenance checks can prevent wear and tear that might lead to failure.

• Environmental factors like earthquakes or strong winds can increase the likelihood of a fan falling.

• Older fans or those with damage...read more
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Q2. Tell me briefly about the OOP concepts.
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OOP concepts include encapsulation, inheritance, polymorphism, and abstraction, forming the foundation of object-oriented programming.
• Encapsulation: Bundling data and methods that operate on the data within a single unit (class). Example: A 'Car' class with properties like 'color' and methods like 'drive()'.

• Inheritance: Mechanism where a new class inherits properties and methods from an existing class. Example: 'Electr...read more
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Q1. Spring IOC containers explain
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Spring IOC containers are responsible for managing the instantiation of objects and their dependencies in a Spring application.
• IOC stands for Inversion of Control, which means that the control of object creation is inverted from the application code to the Spring framework.

• There are two main types of Spring IOC containers: BeanFactory and ApplicationContext.

• BeanFactory is the simplest container, providing basic support...read more
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Q2. Metaspace in java
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Metaspace is a part of the Java HotSpot VM memory where class metadata is stored.
• Metaspace replaces the permanent generation (PermGen) in Java 8 and later versions.

• It is used to store class metadata such as class names, method names, field names, annotations, etc.

• Metaspace is dynamically resized by the JVM based on the application's demand.

• You can monitor Metaspace usage using tools like JConsole or VisualVM.
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Q3. Difference between prdicate & consumer?
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Java 8 stream based question

Find min ,max and second largest (avoid duplicates)using streams

Q1. Multiple inheritance , encapsulation, Collections-Hashmap,Set,list etc with coding questions, substrings,
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Q2. Checked and unchecked expections with example
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Q3. Spring boot annotations
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Q4. Java 8 features,stream api,lambda with coding
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Q1. Rest api end to end flow
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An end-to-end flow of a REST API involves client requests, server processing, and response delivery.
• Client sends an HTTP request to the server (e.g., GET /api/users).

• Server receives the request and routes it to the appropriate handler.

• Handler processes the request, often interacting with a database.

• Server prepares an HTTP response, including status codes and data.

• Client receives the response and processes the data (e.g...read more
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Q2. Hash map vs hash set
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HashMap stores key-value pairs; HashSet stores unique keys without values.
• HashMap allows duplicate values but unique keys. Example: {1: 'A', 2: 'B', 1: 'C'} results in {1: 'C', 2: 'B'}.

• HashSet only stores unique elements. Example: {1, 2, 2, 3} results in {1, 2, 3}.

• HashMap provides O(1) average time complexity for get and put operations.

• HashSet provides O(1) average time complexity for add, remove, and contains operatio...read more
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I will have a coding test with a paper and pen that includes various questions on merging, arrays, and collections. Following that, there will be a technical interview focused on data structures and algorithms. I find the process to be quite lengthy, and I haven't been able to succeed.