Redpine Signals, Inc Hyderabad Interview Experience | Set 1
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Written Test:Questions asked From fallowing concepts:1. Aptitude2. C aptitude Questions (very easy vectorians easily crack those)3. OS basic commandsQ1. How wil...
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Written Test: Questions asked From fallowing concepts: 1. Aptitude 2. C aptitude Questions (very easy vectorians easily crack those) 3. OS basic commands Q1. How will you copy all files in one directory (which consists of sub-directiories also) to another directory.Ans :cp –R dir1 dir2 4. General Knowledge Questions 1.”Pucket” word used in which Sport? 2. What is the Tata company JLR? Ans:Jarguon Land Rover 3. What is LTE? Ans:Long Term Evaluation (4G Technology) FIRST TECHNICAL ROUND: Questions on C programing : 1. Explain about storage classes in C? 2. What is the use of header file? 3. One variable defined in one file and if u want to use that variable in two or more files what will you do? 4.
Output of the fallowing c code struct node { int a; char b[]; }; void main() { struct node var; printf(“sizeof structure=%d
”,sizeof(var)); } Ans:Error 5. Explain dynamic memory allocation? What is the difference between malloc() and calloc() ? 6. What is function pointer?declare function pointer to function which accepts two integers and returns float ?practical use of function pointer? 7. Write a program to find the position of first non-zero bit? 8. Where local,static and global variables stored in the primary memory? Questions on operating system: 1. what is semaphore and binary semaphore? 2. What is API? how system call works? 3. Explain about IPC techniques? 4. What will happen when Interrupt occur? 5. How interrupt handles in OS? 6. Explain open() system call and file descriptor? 7. What is preemptive and Non-preemtive scheduling ? 8. Explain Dead lock conditions 9. What is ISR? 10. What is Virtual memory and Physical Memory? SECOND TECHNICAL ROUND Questions on Embedded Systems 1. Tell me about yourself 2. What is Embedded system? 3. Difference between Embedded and Non Embedded Systems? 4. Draw Block diagram of Embedded system and Explain Each component present in the embedded system. 5. Explain about SPI and I2C Protocols and what is the difference between them? And where they used in practical? 6. Explain about UART Interface and what is the speed of UART? 7. Which has the fast data rate among UART,USB,SPI and I2C ? 8. What is RTOS? 9. Explain about Soft real time system and Hard Real Time system? 10. Explain About LINUX Device Drivers. 11. Explain Vector Project In Detail Questions on NETWORKING: 1. Explain about OSI reference Model and Explain Each Layer in it? 2. Why TCP/IP called so instead of calling TCP and IP individually? 3. Explain TCP/IP reference Model? Explain about Each Layer? 4. What is Protocol? 5. What is SMTP protocol and where it is Present? 6. Difference between TCP and UDP? 7. Where IP protocol Present? 8. What is MAC Address how many bits it is? 9. In which Layer MAC address Present?
HR ROUND: Simple Questions: 1. Tell me About Yourself. 2. What you know about Redpine signals? 3. Why we hire you? 4. How is the Vector Training? When your course Completed? 5. What is most memorable event in your life? 6. Any questions to ask?
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About Redpine Signals Interview Reports
This question was reported by a candidate who interviewed at Redpine Signals. LeakCode aggregates interview reports from 10+ sources, including 1Point3Acres, Glassdoor, LeetCode Discuss, Blind, Reddit, Indeed, and Nowcoder. Each report is translated where necessary, deduplicated against existing entries, and tagged by company, role, round type, and reporting date.
Use this question as one calibration data point, not a memorization target. Companies typically rotate their question pools every 2-4 months; the exact wording of a 2024 question may differ from what you encounter today. The underlying pattern, difficulty level, and follow-up depth at Redpine Signals are the higher-signal extractions to take from this report.
For broader preparation context, the Redpine Signals interview process typically includes a recruiter screen, one or two technical phone screens, and a 4-5 round on-site loop covering coding, system design (at L4+ levels), and behavioral. Reports tagged on LeakCode show the round-by-round distribution and typical difficulty calibration. To browse questions filtered by round type and seniority, use the company hub linked above.
How To Practice This Type of Question
Solve similar problems on LeetCode under timed conditions (25-35 minutes per medium difficulty). The goal is pattern recognition: recognize the underlying technique (sliding window, two-pointer, BFS, memoized recursion, etc.) within 60-90 seconds of reading. Strong candidates verbalize their hypothesis out loud before coding, then iterate based on feedback. Weak candidates dive into implementation immediately, lose time on the wrong approach, and run out of time for follow-ups.
Companies update their question pools every 2-4 months. The exact wording of any given question may have been retired by the time you interview. Focus your prep on the pattern, not the specific problem. The patterns that appear in Redpine Signals reports consistently are the ones worth investing in; one-off niche problems are not.
During Your Redpine Signals Round
Apply the standard interview round template: clarify requirements (2-3 minutes), state your approach out loud and confirm direction with the interviewer (3-5 minutes), code with narration (15-25 minutes), test with concrete examples including edge cases (5 minutes), discuss optimization or trade-offs if time permits (5 minutes). This template is universally accepted across FAANG and adjacent companies; deviating from it produces weaker interviewer feedback signal.
The single most predictive failure mode in Redpine Signals reports tagged "no hire": not asking clarifying questions. Interviewers are explicitly trained to weight this. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's written notes.