Wtw Global Delivery And Solutions Production Graduate Engineer Trainee Interview Questions and Answers

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Q1. Problem solving and programming questions
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Q1. About the company Additional intrest other than studies
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There was a coding test on hackerank

It was good but prepared on technical basis

Q1. What is primary key
Ans. 
Primary key is a unique identifier for each record in a database table.
• Primary key ensures each record in a table is unique

• It can be a single column or a combination of columns

• Primary key values cannot be NULL

• Example: In a table of students, student ID can be a primary key
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Q2. What is foreign key
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Foreign key is a column or a set of columns in a table that uniquely identifies a row in another table.
• A foreign key establishes a relationship between two tables in a database.

• It ensures referential integrity by enforcing a link between the data in the two tables.

• Foreign key constraints prevent actions that would destroy links between tables, such as deleting a row that is referenced by another table.

• Example: In a dat...read more
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You have to pass the hackerrank assessment before they could contact you

Q1. Tell us about yourself
Ans. 
I am a dedicated and detail-oriented engineer with a passion for problem-solving and continuous learning.
• Graduated with a degree in Engineering from XYZ University

• Completed internships at ABC Company and gained hands-on experience in project management

• Proficient in CAD software and technical drawing

• Strong communication skills and ability to work well in a team
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Q2. Expected salary
Ans. 
My expected salary is in line with industry standards and reflects my experience and qualifications.
• Research industry standards for Associate Engineer salaries

• Consider my experience and qualifications when determining salary expectations

• Be prepared to negotiate based on the company's offer and benefits package
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Q1. What is the process of refactoring code?
Ans. 
Refactoring code involves restructuring existing code to improve its readability, maintainability, and performance without changing its functionality.
• Identify code smells: Look for areas in the code that are difficult to understand or maintain, such as long methods or duplicated code.

• Simplify complex methods: Break down large methods into smaller, more manageable ones. For example, a method that processes data can be s...read more
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Q2. Write Sql queries, react questions
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Q1. In detail discusssion about work done in previous organization.
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Q2. Challenges faced in previous projects.
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Q1. Basically questions to figure out the personality of the candidate and his/her cultural fit.
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Q2. Manager at times ask real time use cases and scenario based questions
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Q1. Basic questions like why do you want to join us.
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Q2. Why are you leaving your current organization.
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Q1. How AMEX makes money?
Ans. 
American Express makes money primarily through fees charged to merchants and cardholders, as well as interest on outstanding balances.
• AMEX charges merchants a fee for accepting their cards, known as interchange fees.

• Cardholders pay annual fees, late fees, and interest on balances carried over from month to month.

• AMEX also earns revenue from its travel services, insurance products, and investment services.

• The company ma...read more
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Q2. How AMEX is different from Visa/Master card?
Ans. 
AMEX offers charge cards while Visa/Mastercard offer credit cards. AMEX has higher fees but better rewards.
• AMEX is a charge card, requiring full payment each month, while Visa/Mastercard offer credit cards with the option to carry a balance.

• AMEX typically has higher annual fees compared to Visa/Mastercard.

• AMEX is known for its premium rewards and benefits, catering to a more affluent customer base.

• Visa/Mastercard are a...read more
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Q1. Strengths or Weakness
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Problem solving questions

Q1. Hibernate interview questions
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Q2. Skills mentioned in profile
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Q1. Write logic java program using streams
Ans. 
Program to filter even numbers from an array using Java streams
• Use Java streams to filter even numbers from an array

• Use filter() method with lambda expression to check if a number is even

• Collect the filtered numbers into a new array using collect() method
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Q2. Write rest template logic while calling external services?
Ans. 
Use RestTemplate to make HTTP requests to external services in Java applications.
• Create a RestTemplate object to send HTTP requests.

• Use methods like getForObject() or postForObject() to make GET or POST requests respectively.

• Set headers, request parameters, and body if needed.

• Handle the response received from the external service.
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Q3. Finding the adjacent nodes in the LinkedList?
Ans. 
Adjacent nodes in a LinkedList are the nodes that are next to each other in the sequence.
• To find adjacent nodes in a LinkedList, you can simply traverse the list and access the next node for each current node.

• For example, if the LinkedList is 1 -> 2 -> 3 -> 4, then the adjacent nodes for node 2 are 1 and 3.

• You can use a while loop to iterate through the LinkedList and compare each node with its next node to find adjace
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Mostly on Strings and substring problems