JNTU
JNTU B.Tech III LINUX PROGRAMMING Previous Question Paper (August/September - 2024 - R13)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What does the permission string ‘rwxr-xr--’ represent?
Answer
The permission string rwxr-xr-- indicates that the file owner has read, write, and execute permissions; the group members have read and execute permissions; and others have no permissions.
What is the difference between built-in commands and external commands in Bash?
Answer
Built-in commands are executed directly within the shell process because they are part of the shell's own code (e.g., cd, echo). External commands are separate executable programs located on the disk; the shell must fork a child process and use exec to run them.
What does the root directory (‘/’) represent in the Unix file system hierarchy?
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What is a symbolic (soft) link, and how does it differ from a hard link?
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What is the purpose of the pause function in signal handling?
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How do you terminate a process using the exit system call?
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What is the primary difference between unnamed pipes and FIFOs (named pipes)?
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How can semaphores be used for file locking?
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What is shared memory, and why is it used in inter-process communication?
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Which system call is used to establish a connection between a client and a server?
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Part B
Evaluate the impact of file permissions on system security. How do different permission settings affect user access and system integrity?
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Evaluate the importance of text processing utilities in data analysis and reporting.
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Explain how arithmetic operations are performed in Bash.
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Explain the importance of debugging in shell scripting. What tools and techniques are available for identifying and fixing errors in Bash scripts?
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Explain the hierarchical structure of the Unix file system. How does this structure support organization and management of files and directories?
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Explain the difference between ‘stat’, ‘fstat’, and ‘lstat’ system calls.
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Discuss the mkdir command and its options in Unix-like systems.
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Discuss how to view the contents of a directory using Unix commands.
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Explain the layout of a C program image in main memory. What are the key segments involved, and how do they contribute to the execution of a program?
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Describe the concepts of process groups, sessions, and controlling terminals.
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Explain the difference between unreliable and reliable signals.
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Compare and contrast threads and processes.
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Explain the different methods of IPC available for processes running on a single computer system.
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Explain the process and implications of creating FIFOs in Unix-like systems.
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Discuss the potential limitations and challenges associated with using message queues for IPC.
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Describe the APIs provided for semaphore management.
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Analyze the potential security and synchronization issues associated with shared memory. How can these issues be mitigated in a shared memory system?
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Explain the concept of Berkeley Sockets and their significance in network communication.
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