BOB Capital Markets Data Engineer Interview Questions and Answers

Easy to moderate question

Q1. What is Axios? What is friend function? Given any array find the multiple elements?
Ans. 
Axios is a popular JavaScript library used for making HTTP requests.
• Axios is commonly used in frontend applications to communicate with backend servers.

• It supports promises and can be used in both browser and Node.js environments.

• Example: axios.get('https://api.example.com/data')

• Friend function is a function that is not a member of a class but has access to its private and protected members.

• It is declared with the keyw...read more
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Basic java based questions

Q1. Data structures and algorithms
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Q2. Linked list implementation
Ans. 
Linked list is a data structure where each element points to the next element in the sequence.
• Nodes contain data and a reference to the next node

• Insertion and deletion can be done efficiently

• Traversal starts from the head node

• Example: Singly linked list, Doubly linked list
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Q1. Tell me about yourself
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I am a data analyst with a strong background in statistics and data visualization.
• Graduated with a degree in Statistics

• Proficient in programming languages like Python and R

• Experience in analyzing large datasets and creating data visualizations

• Strong problem-solving skills
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Aptitude + Coding Test. 27 basic Aptitude problems and 3 problem solving questions.

Q1. Technical Round 1 has questions based on databases. NoSql will be + point. UI technologies and basic data structures.
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Q1. Technical Round 2, follow-up from round 1. Some more questions on databases
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Q1. Core java Java script Servlet jsp
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Q1. Servlet and jsp
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Q1. Salary discussion
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Basic java questions

Q1. Explain Linked list implementation and stack
Ans. 
Linked list is a data structure where each element points to the next element. Stack is a data structure that follows Last In First Out (LIFO) principle.
• Linked list implementation involves creating nodes with data and a pointer to the next node.

• Stack implementation involves pushing elements onto the stack and popping them off in reverse order.

• Example: Linked list - 1 -> 2 -> 3 -> NULL, Stack - push(1), push(2), push(3)
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Q2. Oops concepts in java
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Oops concepts in Java refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a method to do different things based on the object it is acting upon.

• Abstraction: Hiding the imp...read more
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