What is the binary representation of a given integer?
Candidates must explain how to convert an integer to its binary string form. It tests bitwise operations and division logic.
Why Interviewers Ask This
This question tests understanding of binary systems and bitwise operations. Interviewers want to see if candidates know how to perform manual conversion or use built-in functions effectively. It also checks handling of negative numbers and leading zeros.
How to Answer This Question
Explain repeatedly dividing the number by 2 and collecting remainders. Reverse the collected remainders to get the binary string. Alternatively, mention built-in functions like bin() in Python. Discuss handling negative numbers using two's complement if necessary.
Key Points to Cover
- Division by 2
- Remainder collection
- Reversing the result
- Built-in alternatives
Sample Answer
To get the binary representation of an integer, I can repeatedly divide the number by 2 and record the remainder at each step. Once the number becomes zero, I reverse the sequence of remainders to form the binary string.…
Common Mistakes to Avoid
- Not reversing the remainders
- Ignoring negative number handling
- Incorrect loop termination
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