Unix questions and answers has been designed with a special intention of helping students and professionals preparing for various certification exams and job interviewsthis section provides a useful collection of sample interview questions and multiple choice questions mcqs and their answers with appropriate explanations. 250 unix linux interview questions and answers question1 how are devices represented in unix question2 what is inode question3 brief about the directory representation in unix question4 what are the unix system calls for i o question5 how do you change file access permissions. To answer this unix or linux interview question you must know the basics of files and directories in unix the 644 represents permission 110 for the owner permission 100 for the group and 100 for others which means read write for an owner who creates that file and read only permission for group and others you can also see the linux command line basics course on udemy to learn more about . Question 1 what is unix what is linux unix is a powerful operating system originally developed at att bell labs it is very popular among the scientific engineering and academic communities due to its multi user and multi tasking environment flexibility and portability electronic mail and networking capabilities and the numerous programming text processing and scientific utilities . Unix linux interview questions and answers 1 how are devices represented in unix all devices are represented by files called special files that are located in dev directory
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