Birlasoft Senior Engineer Interview Questions and Answers

Q1. Swap two variables without temp
Ans. 
Use XOR operation to swap two variables without using a temporary variable
• Use XOR operation to swap two variables without using a temporary variable

• Example: a = 5, b = 10. a = a XOR b, b = a XOR b, a = a XOR b. Now a = 10, b = 5
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Q2. Multiply two matrices in CUDA
Ans. 
Matrix multiplication in CUDA involves parallelizing the computation across multiple threads on the GPU.
• Use CUDA kernels to launch parallel threads for matrix multiplication.

• Divide the matrices into blocks and load them into shared memory for faster access.

• Implement the matrix multiplication algorithm in CUDA C/C++.

• Ensure proper memory management and synchronization between threads.
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Q1. Merge two sorted arrays
Ans. 
Merge two sorted arrays into a single sorted array
• Create a new array to store the merged result

• Iterate through both arrays simultaneously and compare elements

• Add the smaller element to the new array and move to the next element in that array

• Continue until all elements from both arrays are merged
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Q1. Technical team will schedule a call and discuss about our role and responsibility.
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Q1. Based on your role
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Q1. Selenium commands
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Q2. Java program for prime number
Ans. 
A Java program to check if a number is prime or not.
• Create a function to check if a number is prime by iterating from 2 to the square root of the number.

• If the number is divisible by any number in that range, it is not prime.

• Handle edge cases like 0, 1, and negative numbers separately.
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Q3. Java program for printing repeated characters in a string
Ans. 
Java program to find and print repeated characters in a string
• Iterate through each character in the string

• Use a HashMap to store the count of each character

• Print characters with count greater than 1
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Q1. Python related libraries and SQL
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Q1. Baic question about c with examples.
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Q2. More question about handson experience topics.
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Q1. Dependency injection
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Q2. Solid principles
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1st round was consist of mcq questions the difficulty level was moderate to hard.