OS Interview Questions

PROCESS:
1. Instruction execution in machine code
2. Active entity
3. Store in main memory

PROGRAM:
1. Instruction is only programming language
2. Passive entity
3. Store in secondary storage

program is a passive entity and process is an active entity...

Semaphore is a shared binary variable which can take values either 0 or 1. The primary purpose of them is to ensure mutual exclusion property between or among the two or more processes that want to en...

A semaphore is a synchronization tool that provides a general-purpose solution for controlling access to critical sections. A semaphore is an abstract data type (ADT) that defines a nonnegative intege...

system power on but without ram display will not come ............ if ram not working 3 deep sounds come form CPU

ans will depend on type of system.
if OS of that system can be somehow put into ROM itself then , of course Yes .
and if OS is big enough not to be put in to ROM , then NO.
btw There are many mobile whose OS are loaded into ROM itself, they dont need RAM.

New Technology File System

NTFS= New Technology File System. or Network Technology File System

Usually, on increasing the number of frames allocated to a process virtual memory, the process execution is faster, because fewer page faults occur. Sometimes, the reverse happens, i.e., the executio...

The Belady's anomaly accurs in case of the FIFO page replacement policy in the OS.When this FIFO is used and the number of page frames are increased in number, then the frames that are required by...

Associative memory is the type of memory that allows the recall of the data based on the degrees of similarity between the input pattern and the pattern stored in the memory.It is a memory organization where memory is accessed by content and not through address.

Multitasking is Timesharing system + Management of timesharing system. Therefore Multitasking is broader concept.

Multitasking can be achieved by Time sharing operating system. In time sharing O/S CPU time is divided into fixed small time slices and each task given this fixed duration of time. It uses the Round Robin scheduling algorithm.
thanks!!!!!!!!!

Operating system is a system software.

Operating System;
System which controls the operations of the hardware. Serves as an intermediary between the application layer and the hardware it interfaces with.

Timesharing system: There is a given time for each process and on the basis of this time, multiple programs are executed.

Multi-tasking system: Multiple request come to processor and one after another task should be carried out. It may be take more time than the timesharing system.

Layered structure of an operating system: LAYERS ===== User User Interface Program / Application Program System Services and File System Input and Output Management User Console Memory Management Pro...

Resource Parameters are classified under 2 categories: Main Parameters Additional Parameters Main parameters are the most important parameters pertaining to functionality, performance, and availabil...

Prior to the introduction of Operating System, operation instructions were generally fed into the electronic system bit by bit on rows of mechanical switches or by jumper wires on plug boards.

Batch Processing:In batch processing Operating systems the tasks are performed in batches,os waits for a batch of tasks to arrive and performs the operation on the batch. Time Sharing: in time sharin...

batch processing when all the job in a batch is processed by the os on the basis of priority of job without user intervention is called batch processingIn time sharing systems the cpu time is shared b...

Wrong Ans ........bro ............. virtual memory is a feature of operating system that enables a process a memory(RAM) address space that is independent of other processes running, and USE THE SPACE THAT IS LARGER THEN THE ACTUAL AMOUNT OF RAM IS PRESENT.

Physical memory is the actual real memory used in RAM. Virtual memory as the name suggests is not real. The OS uses virtual memory as a memory management technique in which non-contiguous memory is pr...

Answer 1: use for contiguous memory allocation.

Answre is 1. For contiguous memory allocations

Pre above explanation, only computer has "Hibernation Mode", whether the LAN HUB also include the function or not?

hibernation mode in windows refers to the mode in which we can just conserve power without closing applications.when we shut down,all the applications closes first and then the system gets off. but in...

The main difference between GPOS and RTOS is that the RTOS should be deterministic. That is, the time consumed by the operating system to execute it's service is fixed where as in GPOS it's variable...

The main difference between GPOS and RTOS is that the RTOS should be deterministic. That is, the time consumed by the operating system to execute it's service is fixed where as in GPOS it's variab...

Linux - File System format supported

EXT2 - Extended 2

EXT3 - Extended 2 + Journal

JFS - Journal file system

Resier - Advanced Journal

LVM - Logical Volume manager

VFAT - FAT 16 / 32

EXT 4 [WHICH IS LATEST IN RHEL6.0]

There are lot of file system types are used in Linux. Mostly Linux uses ext3 file ystem.You can know by using the command given below.

fdisk /dev/dsa
fdisk /dev/hda

Once you executed the above one just type "l" and it will show all fil system types in linux.

  Dear frnd,Win981. Win98 Support FAT file system & XP support NTFS And Also FAT. 2. Win98 Does not Having Remote Access facility While in XP there is.3. win98 Does not need faster proce...

1. Win98 Support FAT file system & XP support NTFS And Also FAT. 2. Win98 Does not Having Remote Access facility While in XP there is. 3. win98 Does not need faster processing speed while XP Need ...