Capita Senior Developer Interview Questions and Answers

Q1. Two Sum to a given sum
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Q1. Longest Palindome Substring
Ans. 
Find the longest palindrome substring in an array of strings.
• Iterate through each string in the array

• Check for palindromes within each string

• Keep track of the longest palindrome found
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Simple crisp and to the point questions no extra stuff

Q1. General to your technical background
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Q1. General and to the the point mentioned in your cv
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Q1. What is Dependency Injection?
Ans. 
Dependency Injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Allows for easier testing by providing mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection
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Q2. How to handle exception in java
Ans. 
In Java, exceptions can be handled using try-catch blocks to catch and handle specific exceptions.
• Use try-catch blocks to catch exceptions and handle them gracefully

• Use multiple catch blocks to handle different types of exceptions

• Use finally block to execute code regardless of whether an exception is thrown or not

• Throw custom exceptions using throw keyword
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Q1. In Java8, different between flatmap and map
Ans. 
map transforms each element in a stream, while flatMap transforms each element into multiple elements
• map applies a function to each element in a stream and returns a new stream of the results

• flatMap applies a function that returns a stream for each element in the original stream, then flattens the streams into a single stream

• Example: map - stream.map(x -> x * x), flatMap - stream.flatMap(str -> Arrays.stream(str.split(
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Q2. How to handle the ConcureentModificationException
Ans. 
ConcurrentModificationException occurs when a collection is modified while iterating over it.
• Use Iterator to iterate over the collection instead of foreach loop.

• If modification is necessary, use Iterator's remove() method instead of collection's remove() method.

• Consider using synchronized collections or ConcurrentHashMap to avoid ConcurrentModificationException.
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Q1. Write MySQL query to find employee with 2nd Highest salary
Ans. 
Use MySQL query with ORDER BY and LIMIT to find employee with 2nd highest salary.
• Use ORDER BY salary DESC to sort salaries in descending order

• Use LIMIT 1,1 to skip the highest salary and get the second highest salary
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Q2. What is branch in git
Ans. 
A branch in git is a separate line of development that allows you to work on features or fixes without affecting the main codebase.
• Branches allow for parallel development

• They can be created, switched between, merged, and deleted

• Common branches include master, develop, feature branches, and release branches
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Reasoning, English, mathematics

HTML, JavaScript, python

Q1. Why should you hear me
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Q2. What you can do for my company
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Q3. Tell me about your self
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Q4. What is front end developer work
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Q5. Ask some question from resume
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Basic aptitude questions held online with their portal

Broad coding and basic oops

Q1. About hr questions
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Q1. Questions on core java, Collections, Oops concepts
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Q1. Explain singleton design pattern
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Ensures a class has only one instance by providing a global access point to it

• Uses a private constructor to restrict instantiation of the class

• Provides a static method to access the single instance

• Commonly used in scenarios where only one instance of a class is needed, such as database connections or configuration
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Q1. React, javascript, sql
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Q1. Sql and dbms concepts and fundamentals
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