AFour Technologies Senior Software Developer and Engineer Interview Questions and Answers

Medium level questions from all sectors

Technical MCQ and easy coding questions

Q1. According to resume
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Artificial intelligence

Q1. Family background
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Q1. Basic core java questions
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Q2. Prior financial experience
Ans. 
Yes
• Worked as a software engineer at a financial institution for 5 years

• Developed and maintained financial software applications

• Implemented complex financial algorithms and calculations

• Collaborated with financial analysts and stakeholders to understand requirements

• Ensured compliance with financial regulations and security standards
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Q1. Core java coding questions on strings, filereader, arrays
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Q2. Questions on rest services methods and implementation
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Q1. Previous experience questions
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Easy level questions on string, linked list and array

Q1. Difference between TCP and UDP
Ans. 
TCP is a connection-oriented protocol while UDP is connectionless.
• TCP provides reliable, ordered, and error-checked delivery of data while UDP does not guarantee any of these.

• TCP is slower but more reliable while UDP is faster but less reliable.

• TCP is used for applications that require high reliability and accuracy such as email, file transfer, and web browsing while UDP is used for applications that require speed and ...read more
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Q2. Nibble swap program in C
Ans. 
A nibble swap program in C
• Nibble swap means swapping the 4-bit halves of a byte

• Use bitwise operators to perform the swap

• Example: unsigned char x = 0xAB; x = ((x & 0x0F) << 4) | ((x & 0xF0) >> 4);
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Q1. Reverse Linked List in C
Ans. 
Reverse a linked list in C language.
• Create three pointers: current, previous, and next.

• Traverse the linked list and change the direction of the pointers.

• Return the new head of the reversed linked list.
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Q2. Write an API call in C
Ans. 
API call in C
• Include the necessary header files

• Create a URL string with the required parameters

• Use the curl library to make the API call

• Handle the response data appropriately
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Programming on basics of C

Programming on basics of C

Q1. Salary details and location preference
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Q1. Middleware , dependency injection
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Q1. Subject and subject behaviour
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Duration:30 min
Question from percentage,ratios ,HCF/LCM etc.,
Logical reasoning, English

Q1. Reverse a string by making groups of given 'm' characters
Ans. 
Reverse a string by grouping 'm' characters together
• Iterate through the string in groups of 'm' characters

• Reverse each group of 'm' characters

• Concatenate the reversed groups to get the final reversed string
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Q1. General HR questions
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Q2. What is your family background?
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Q3. Why should we hire you?
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Q1. Tell me something about Data Sturcture
Ans. 
Data structure is a way of organizing and storing data in a computer so that it can be accessed and used efficiently.
• Data structures can be linear (arrays, linked lists) or non-linear (trees, graphs)

• Common operations on data structures include insertion, deletion, and searching

• Examples of data structures include stacks, queues, hash tables, and binary trees
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Q1. What is Connection pooling
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Connection pooling is a technique to manage database connections efficiently, reducing overhead and improving performance.
• Connection pooling maintains a pool of active database connections for reuse.

• It reduces the overhead of establishing a new connection for each database request.

• Example: A web application can reuse connections from the pool instead of opening new ones for each user request.

• Connection pools can be con...read more
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Q2. What is mounting in docker
Ans. 
Mounting in Docker allows you to share files between the host and containers, enabling data persistence and configuration management.
• Mounting can be done using volumes or bind mounts.

• Volumes are managed by Docker and are stored in a part of the host filesystem which is not directly accessible.

• Example of a volume: `docker run -v my_volume:/data my_image`.

• Bind mounts allow you to specify an exact path on the host, e.g., ...read more
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Q3. What is decorators
Ans. 
Decorators are a design pattern in Python that allows modifying the behavior of functions or methods at runtime.
• A decorator is a function that takes another function and extends its behavior without explicitly modifying it.

• Common use cases include logging, access control, and caching.

• Example: @staticmethod and @classmethod are built-in decorators in Python.

• Custom decorators can be created using nested functions.

• Example...read more
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Q4. Shell script question
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