Frequently Asked Questions - Operating System Concepts

• What is MUTEX ?
• What isthe difference between a 'thread' and a 'process'?
• What is INODE?
• Explain the working of Virtual Memory.
• How does Windows NT supports Multitasking?
• Explain the Unix Kernel.
• What is Concurrency? Expain with example Deadlock and Starvation.
• What are your solution strategies for "Dining Philosophers Problem" ?
• Explain Memory Partitioning, Paging, Segmentation.
• Explain Scheduling.
• Operating System Security.
• What is Semaphore?
• Explain the following file systems : NTFS, Macintosh(HPFS), FAT .
• What are the different process states?
• What is Marshalling?
• Define and explain COM?
• What is Marshalling?
• Difference - Loading and Linking ?
• What are the basic functions of an operating system?
• Explain briefly about, processor, assembler, compiler, loader, linker and the functions executed by them.
• What are the difference phases of software development? Explain briefly?
• Differentiate between RAM and ROM?
• What is DRAM? In which form does it store data?
• What is cache memory?
• What is hard disk and what is its purpose?
• Differentiate between Complier and Interpreter?
• What are the different tasks of Lexical analysis?
• What are the different functions of Syntax phase, Sheduler?
• What are the main difference between Micro-Controller and Micro- Processor?
• Describe different job scheduling in operating systems.
• What is a Real-Time System ?
• What is the difference between Hard and Soft real-time systems ?
• What is a mission critical system ?
• What is the important aspect of a real-time system ?
•  If two processes which shares same system memory and system clock in a distributed system, What is it called?
• What is the state of the processor, when a process is waiting for some event to occur?
• What do you mean by deadlock?
• Explain the difference between microkernel and macro kernel.
• Give an example of microkernel.
• When would you choose bottom up methodology?
• When would you choose top down methodology?
• Write a small dc shell script to find number of FF in the design.
• Why paging is used ?
• Which is the best page replacement algorithm and Why? How much time is spent usually in each phases and why?
• Difference between Primary storage and secondary storage?
• What is multi tasking, multi programming, multi threading?
• Difference between multi threading and multi tasking?
• What is software life cycle?
• Demand paging, page faults, replacement algorithms, thrashing, etc.
• Explain about paged segmentation and segment paging
• While running DOS on a PC, which command would be used to duplicate the entire diskette?