Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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please asnwer right one do not use chatgpt please 

 

### Quiz: Tree of Directories and Search Methods

#### Question 36:
When creating a tree of directories with depth \( d \) and breadth \( b \), how many nested loops do you have to have as we discussed in class?
1. (a) 1
2. (b) 2
3. (c) 3
4. (d) 4
5. (e) none of the above

#### Question 37:
When creating a tree of directories with depth \( d \) and breadth \( b \), the directories that have yet to be explored are held (memorized) in:
1. (a) open
2. (b) closed
3. (c) temp
4. (d) successors
5. (e) none of the above

#### Question 38:
When creating a tree of directories with depth \( d \) and breadth \( b \), the directories that have already been explored are held (memorized) in:
1. (a) open
2. (b) closed
3. (c) temp
4. (d) successors
5. (e) none of the above

#### Question 39:
Breadth-first search creates directories in the following order for \( d = 3 \) and \( b = 3 \), where numbers are directory names and '/'s are subdirectories:
1. (a) 0, 1, 2, 0/0, 0/1, 0/2, 1/0, ...
2. (b) 0, 0/0, 0/0/0, 0/0/1, 0/0/2, 0/1/0, ...
3. (c) 0, 1, 2, 0/0, 0/0/0, 0/0/1, 0/0/2, ...
4. (d) 0, 0/0, 1/0, 2, 1, 1/0, 1/1, 1/2, ...
5. (e) none of the above

#### Question 40:
Depth-first search creates directories in the following order for \( d = 3 \) and \( b = 3 \), where numbers are directory names and '/'s are subdirectories:
1. (
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Transcribed Image Text:### Quiz: Tree of Directories and Search Methods #### Question 36: When creating a tree of directories with depth \( d \) and breadth \( b \), how many nested loops do you have to have as we discussed in class? 1. (a) 1 2. (b) 2 3. (c) 3 4. (d) 4 5. (e) none of the above #### Question 37: When creating a tree of directories with depth \( d \) and breadth \( b \), the directories that have yet to be explored are held (memorized) in: 1. (a) open 2. (b) closed 3. (c) temp 4. (d) successors 5. (e) none of the above #### Question 38: When creating a tree of directories with depth \( d \) and breadth \( b \), the directories that have already been explored are held (memorized) in: 1. (a) open 2. (b) closed 3. (c) temp 4. (d) successors 5. (e) none of the above #### Question 39: Breadth-first search creates directories in the following order for \( d = 3 \) and \( b = 3 \), where numbers are directory names and '/'s are subdirectories: 1. (a) 0, 1, 2, 0/0, 0/1, 0/2, 1/0, ... 2. (b) 0, 0/0, 0/0/0, 0/0/1, 0/0/2, 0/1/0, ... 3. (c) 0, 1, 2, 0/0, 0/0/0, 0/0/1, 0/0/2, ... 4. (d) 0, 0/0, 1/0, 2, 1, 1/0, 1/1, 1/2, ... 5. (e) none of the above #### Question 40: Depth-first search creates directories in the following order for \( d = 3 \) and \( b = 3 \), where numbers are directory names and '/'s are subdirectories: 1. (
### Bash Scripting Questions

#### Question 11
**What is the Bash command to find the number of characters in string S?**
(a) `${#S}`  
(b) `#{S}`  
(c) `#S`  
(d) `#$S`  
(e) `none of the above`  

#### Question 12
**The number of iterations for the `for` loop below is:**
```bash
for a in b c d e; do echo $a; done;
```
(a) 1  
(b) 2  
(c) 3  
(d) 4  
(e) none of the above  

#### Question 13
**The number of iterations for the `for` loop below is:**
```bash
for a in 'b c d e'; do echo $a; done;
```
(a) 1  
(b) 2  
(c) 3  
(d) 4  
(e) none of the above  

#### Question 14
**Given `lst=(b c d e)`, the number of iterations for the `for` loop below is:**
```bash
for a in $lst; do echo $a; done;
```
(a) 1  
(b) 2  
(c) 3  
(d) 4  
(e) none of the above  

#### Question 15
**Given `lst=(b c d e)`, the number of iterations for the `for` loop below is:**
```bash
for a in ${lst[@]}; do echo $a; done;
```
(a) 1  
(b) 2  
(c) 3  
(d) 4  
(e) none of the above
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Transcribed Image Text:### Bash Scripting Questions #### Question 11 **What is the Bash command to find the number of characters in string S?** (a) `${#S}` (b) `#{S}` (c) `#S` (d) `#$S` (e) `none of the above` #### Question 12 **The number of iterations for the `for` loop below is:** ```bash for a in b c d e; do echo $a; done; ``` (a) 1 (b) 2 (c) 3 (d) 4 (e) none of the above #### Question 13 **The number of iterations for the `for` loop below is:** ```bash for a in 'b c d e'; do echo $a; done; ``` (a) 1 (b) 2 (c) 3 (d) 4 (e) none of the above #### Question 14 **Given `lst=(b c d e)`, the number of iterations for the `for` loop below is:** ```bash for a in $lst; do echo $a; done; ``` (a) 1 (b) 2 (c) 3 (d) 4 (e) none of the above #### Question 15 **Given `lst=(b c d e)`, the number of iterations for the `for` loop below is:** ```bash for a in ${lst[@]}; do echo $a; done; ``` (a) 1 (b) 2 (c) 3 (d) 4 (e) none of the above
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