Binmile Data Research Executive Interview Questions, Process, and Tips

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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2 medium hard level questions. We just have to code and explain it. Platform doesn't have compilers.

Q1. Given an array Reverse array
Ans. 
Reverse array of strings
• Iterate through the array and swap elements from start to end

• Use two pointers, one at the beginning and one at the end, and swap elements until they meet
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Q2. Giaven a string Reverse string
Ans. 
Reverse a given string
• Use built-in functions like reverse() or loop through the string in reverse order

• Create a new string and append characters from the original string in reverse order

• Convert the string to an array of characters, reverse the array, and then join it back into a string
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Q3. Given array find sum of all elements
Ans. 
Calculate sum of all elements in a given array of strings
• Iterate through the array and convert each element to integer before adding to sum

• Handle edge cases like empty array or non-numeric elements

• Return the final sum after iterating through all elements
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Good Knowledge of DSA is required

Q1. What is singleton design pattern
Ans. 
Singleton design pattern restricts the instantiation of a class to a single instance and provides global access to it.
• Used when only one instance of a class is required throughout the application

• Provides a global point of access to the instance

• Implemented using a private constructor, static method, and static variable

• Example: Logger class, Database connection class
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Q2. C# LINQ queries for group and sum data from data table
Ans. 
C# LINQ queries for group and sum data from data table
• Use GroupBy() method to group data based on a specific column

• Use Sum() method to calculate the sum of a column

• Use Select() method to select the required columns
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Q3. Solid design principles
Ans. 
Solid design principles are a set of guidelines for writing maintainable and scalable code.
• Single Responsibility Principle (SRP) - each class should have only one responsibility

• Open/Closed Principle (OCP) - classes should be open for extension but closed for modification

• Liskov Substitution Principle (LSP) - subclasses should be able to replace their parent classes without affecting the program's correctness

• Interface Se...read more
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Q4. OOPS concepts ,like association and all
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Basic aptitude test and was unproctored

Q1. It was a online technical round
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MCQ questions on OS, JS and HTML

Basic Questions from resume. String/Array DSA questions