Barclays Investment Bank Senior Software Developer Interview Questions and Answers

Three question were given , one was to implement singleton class, other one was easy array question and the third one was was also easy medium which was testing HashMap knowledge
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Q1. Asked to explain the answers you wrote in first round.
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Q2. Some conceptual questions of java like string pools, solid principles, etc.
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Q1. Sort of Managerial Technical round : Core Java
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Q2. Spring boot and about deployment tools.
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Q1. Why do want to join us?
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I am excited about the innovative projects and collaborative team environment at your company.
• Impressed by company's reputation in the industry

• Excited about the opportunity to work on cutting-edge projects

• Looking forward to collaborating with talented team members
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Q2. Have you heard of what your company does and at the end compensation discussion.
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Q1. OOPS concepts, .NET MVC, .NET CORE questions
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Q1. Write a program to find the sum of the contiguous subarray within a one-dimensional array of numbers that has the largest sum.
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Q2. What is the purpose of the 'with' keyword in Python?
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Q3. One question is about finding the output of the code snippet.
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Q4. How would you resolve a merge conflict if two developers are working on the same branch?
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Q1. All the questions are scenario-based. They cover how you collaborate with other teams, your opinion of your team, why you're resigning from your current company, what you value most in your life, and the p...read more
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Mcq+coding which are medium level questions

Q1. Multiple inheritance allowed in java?
Ans. 
No, multiple inheritance is not allowed in Java.
• Java does not support multiple inheritance for classes to avoid the diamond problem.

• However, multiple inheritance is allowed for interfaces in Java.

• Example: class A extends B, C is not allowed, but interface X extends Y, Z is allowed.
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Q2. Diff btw static and final
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Static is used to define class-level variables and methods, while final is used to define constants and prevent inheritance or modification.
• Static variables and methods belong to the class itself, while final variables cannot be changed once initialized.

• Static members can be accessed without creating an instance of the class, while final members must be accessed through an instance.

• Static variables are shared among all...read more
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Q3. What is data encapsulation?
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Data encapsulation is the concept of bundling data and methods that operate on the data into a single unit, known as a class.
• Encapsulation hides the internal state of an object and only exposes the necessary functionalities through methods.

• It helps in achieving data abstraction and information hiding.

• Example: A class 'Car' encapsulates data like speed, color, and methods like accelerate() and brake().
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Q1. Tell me about yourself
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I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills

• Team player with excellent communication skills
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Q2. What are company core values
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Company core values are the fundamental beliefs that guide the behavior and decisions of employees.
• Integrity - acting with honesty and transparency in all dealings

• Innovation - constantly seeking new and better ways to solve problems

• Customer focus - prioritizing the needs and satisfaction of customers

• Teamwork - collaborating effectively with colleagues to achieve common goals
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Q1. Technical questions related to security
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Simple algorithm question about sorting

Q1. Algorith question about quick sort
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Q2. Nlonn run time of the sort
Ans. 
The time complexity of the quicksort algorithm is O(n log n).
• Quicksort has an average time complexity of O(n log n).

• The best case time complexity of quicksort is O(n log n) when the pivot element divides the array into two equal halves.

• The worst case time complexity of quicksort is O(n^2) when the pivot element is the smallest or largest element in the array.
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Q1. - DSA questions (leetcode easy) - Javascript concepts
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Q1. With India Panel -LLD was asked
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Q1. WIth UK Panel Design round 1 - Threading concepts - Async Programming - 1 Design Question
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Q1. With Director Design round 2 - Questions on code quality - 1 design question - Behavioral questions
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