please give right answers do not use other webiste and vhatgpt for this answer its giving wring answers all time please 21 23 25 answer correctly ### Programming and Directory Tree Concepts: Practice Questions#### Assess your understanding of functions and directory trees with the following questions:---**21. Given `f()` and `main()`, what is the output when `main` is called?**```plaintextfunction f() { local p=$2; q=1; r=$1; }function main() { p=1; q=2; r=3; f $p $q $r; echo $p $q $r; }```(a) 1 1 (b) 1 2 (c) 3 3 2 (d) 3 1 1 (e) None of the above ---**22. When creating a tree of directories with depth `d` and breadth `b`, the directories that have yet to be explored are held (memorized) in:**(a) open (b) closed (c) temp (d) successors (e) none of the above ---**23. When creating a tree of directories with depth `d` and breadth `b`, how many nested loops do you have to use as discussed in class?**(a) 1 (b) 2 (c) 3 (d) 4 (e) none of the above ---**24. When creating a tree of directories with depth `d` and breadth `b`, the directories that have already been explored are held (memorized) in:**(a) open (b) closed (c) temp (d) successors (e) none of the above ---**25. Depth-first search creates directories in the following order for `d=3` and `b=3`, where numbers are directory names and `/`'s are subdirectories:**(a) `0, 1, 2, 0/0, 0/1, 0/2, 1/0, ...` (b) `0, 0/0, 0/0/0, 1/0, 0/2, 0/1/0, ...` (c) `0, 1, 2, 0/0, 0/0/0, 0/1, 0/0/2, ...` (d) `0, 0/0, 0/1, 0/2, 1, 1/

In computer programming, the term "echo" typically refers to a command or function that displays…

21. Given f () and main (), what is the output when main is called? () { local p=$2; q=1; r=$1; } function function (a)1 11 main () { p=1; q=2; r=3; f $p $q $r; echo $p $q $r; } (b)1 12 (c)33 2 (d)311 e)None of the above

21. Given f () and main (), what is the output when main is called? () { local p=$2; q=1; r=$1; } function function (a)1 11 main () { p=1; q=2; r=3; f $p $q $r; echo $p $q $r; } (b)1 12 (c)33 2 (d)311 e)None of the above

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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