Hexagon Software Engineer Interview Questions, Process, and Tips for Freshers

Q1. How GraphQL works in the background
Ans. 
GraphQL is a query language for APIs that allows clients to request only the data they need.
• GraphQL uses a schema to define the structure of the data available and the operations that can be performed.

• Clients can specify the exact data they need in their query, reducing over-fetching of data.

• GraphQL servers execute the query by resolving the requested data from various data sources.

• GraphQL supports real-time updates th...read more
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Q2. What is your experience on software architecture
Ans. 
I have 5 years of experience in designing and implementing software architectures for large-scale applications.
• Designed microservices architecture for a cloud-based application, improving scalability and maintainability.

• Implemented event-driven architecture using Kafka for real-time data processing in a financial application.

• Utilized MVC architecture pattern for developing web applications, ensuring separation of conce
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Q1. Diff between malloc & calloc
Ans. 
malloc is used to allocate memory without initializing it, while calloc is used to allocate memory and initialize it to zero.
• malloc allocates a block of memory of specified size, while calloc allocates a block of memory for an array of elements and initializes them to zero

• malloc does not initialize the allocated memory, while calloc initializes the allocated memory to zero

• malloc returns a pointer to the allocated memor...read more
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Q2. Difference between structure & union ? What is structure padding ?
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Structure is a data type that allows storing different types of data in a single variable, while union allows only one type of data. Structure padding is adding empty bytes to align data in memory.
• Structure can store different types of data in a single variable, while union can store only one type of data.

• Example: struct Person { char name[20]; int age; }; union Data { int num; float value; };

• Structure padding is addin...read more
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2 easy questions were there

Q1. Basic oops concept
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Q2. Basic testing questions and coding ques
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