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OS LAB(CSE29)

OS LAB(CSE29)

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What is the command to extract characters from 5th to 9th position from each line of a file?

a. cut -c 5,9 filename

d. cut –c 5-9 filename

100%

b. cut –c 5 to 9 filename

c. cut –c 5:9 filename

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What is the command used to find the path of a process?

Which function is used to execute the program that is currently being run by the calling process to be replaced with a new program.

a. int execve (const char *pathname, char *const argv[], int *const envp[]);

e. int execve (const char *pathname, int *const argv[], char *const envp[]);

d. int execute (const char *pathname, char *const argv[], char *const envp[]);

c. None of above

b. int execve (const char *pathname, char *const argv[], char *const envp[]);

100%

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What is TRUE about Hard link.

i. The inode of all the linked files will be same.

ii. If the original file is deleted then the linked file will no more able to show the content of the file.

iii. Files cannot be linked across the file systems.

iv. Original file will be deleted only if the link count becomes zero.

Identify the statement is true of false.“An unnamed process can communicate between two process biderectionallly.”

b. True

a. False

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A process ececutes the following segment of code

For ( I = 1; I < 10; i++ )

fork();

The find out how many new processes will be created?

Identify the use of “ in “ keyword in case structure of shell programming?

b. Used to store and check all the options

100%

a. Used as an operator

d. Used to store the results

c. None of above

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Mid-term scheduler involves the following transition

Find the correct statement given below.

a. A Fork function call returns PID of child to parent and 0 to its child process.

100%

b. A Fork function call returns PID of parent to child and 1 to its parent process.

c. A Fork function call returns PID of parent to parent and 0 to its child process.

d. A Fork function call returns PID of child to child and PID of parent to parent process.

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Which of the following is equivalent to First come first served scheduling algorithm?

b. Priority scheduling where priority is decided based on arrival time.

c. Both i and ii

d. Round robin scheduling algorithm with very large time slices

67%

a. Shortest remaining time first scheduling

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