please give right answers do not use other webiste and chatgpt for this answer its giving wring answers all time please also this webiste allow exert answer 3 question i am asking only 2 question please 34 35 answer correctly ### UNIX / Linux Command Line Exercises#### 31. Finding File Size with `cut`Assuming the command `ls -l /home/cs288` returns the following file information:```drwxr-xr-x 1 CS288 CS288 123 Dec 25 2013```The command to find the file size `123` is:- (a) `cut -d' ' -f3`- (b) `cut -d' ' -f4`- (c) `cut -f' ' -d4`- (d) `cut -f' ' -c4`- (e) None of the above#### 32. Average File Size CalculationConsider a list of file sizes `lst=(1 2 3 4 5)`, the average file size is computed by:```bashsum=0;n=${#lst[@]};```- (a) `for ((i=0;i

To list commands that end with 'a' under /bin .To find the number of commond that start with 'a'…

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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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please give right answers do not use other webiste and chatgpt for this answer its giving wring answers all time please also this webiste allow exert answer 3 question i am asking only 2 question please 34 35 answer correctly

### UNIX / Linux Command Line Exercises

#### 31. Finding File Size with `cut`

Assuming the command `ls -l /home/cs288` returns the following file information:
```
drwxr-xr-x 1 CS288 CS288 123 Dec 25 2013
```
The command to find the file size `123` is:
- (a) `cut -d' ' -f3`
- (b) `cut -d' ' -f4`
- (c) `cut -f' ' -d4`
- (d) `cut -f' ' -c4`
- (e) None of the above

#### 32. Average File Size Calculation

Consider a list of file sizes `lst=(1 2 3 4 5)`, the average file size is computed by:
```bash
sum=0;
n=${#lst[@]};
```
- (a) `for ((i=0;i<n;i++)); do ((sum=sum+lst[i])); done; ((avg=sum/n));`
- (b) `for x in ${!lst[@]}; do sum='expr $sum + $x'; done; avg='expr $sum / $n';`
- (c) `for x in ${!lst[@]}; do ((sum=sum+lst[x])); done; ((avg=sum/n));`
- (d) All of the above
- (e) None of the above

#### 33. Listing Commands that Start with 'a'

To list commands that start with `a` under `/bin`, you type:
- (a) `ls /bin | grep ^a`
- (b) `ls /bin | grep a*`
- (c) `ls /bin | grep a`
- (d) `ls /bin | grep a$`
- (e) None of the above

#### 34. Listing Commands that End with 'a'

To list commands that end with `a` under `/bin`, you type:
- (a) `ls /bin | grep ^a`
- (b) `ls /bin | grep a*`
- (c) `ls /bin | grep a`
- (d) `ls /bin | grep a$`
- (e) None of the above

#### 35. Finding the Number of Commands that Start with 'a

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