AppDirect Software Development Engineer Interview Questions and Answers

A pointer is a variable that stores the memory address of another variable.

• Pointers are used to manipulate memory directly.

• They can be used to pass large data structures to functions without copying them.

• Pointers can be used to create dynamic data structures like linked lists and trees.

• They can also be used to access hardware directly.

• Examples of pointer types include int*, char*, and void*.

Swap 2 numbers without using 3rd variable

• Use addition and subtraction

• Use multiplication and division

• Use bitwise XOR operation

Answering Fibonacci series with and without recursion

• Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones

• Recursion method involves calling the function within itself

• Non-recursive method involves using a loop to calculate the series

• Recursive method is slower and can cause stack overflow for large inputs

• Non-recursive method is faster and more efficient for large inputs

Print series of prime numbers

• Start with 2 as the first prime number

• Check if each number greater than 2 is divisible by any number less than it

• If not, add it to the list of prime numbers

• Continue until desired number of primes are found

Design a REST API for UserManagement system

• Use HTTP methods like GET, POST, PUT, DELETE for CRUD operations

• Use authentication and authorization for secure access

• Use pagination for large datasets

• Use query parameters for filtering, sorting, and searching

• Use response codes to indicate success or failure

• Use versioning to manage changes in API

• Example endpoints: /users, /users/{id}, /users/{id}/roles

Implement a function to reverse a string

• Create an empty string to store the reversed string

• Iterate through the original string from end to start

• Append each character to the empty string

• Return the reversed string

Data Integrity refers to the accuracy and consistency of data throughout its lifecycle.

• Ensuring data is not corrupted or modified without authorization

• Maintaining data accuracy and consistency through proper storage and retrieval

• Preventing data loss or unauthorized access

• Examples: checksums, encryption, access controls