Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Scala programming
![Name: ____________________________________
Serial Number: **500**
---
```
Nil
} else {
start :: aux (start + 1, count - 1)
}
aux (init, n)
}
val xs : List[Int] = {
val n = 5
createList (2)
}
```
**What will the value of xs be if the programming language uses dynamic scope?**
A: List (2)
B: List (2, 3, 4, 5, 6)
C: List (2, 3, 4, 5)
D: List (2, 3)
E: List (2, 3, 4)
---
**Question 10:** Consider the Scala code:
```
val q = (x:Int) => List (x, x + 1, x + 2)
```
What will happen when q(10) is executed?
A: Returns 33.
B: Returns 10.
C: Returns List (10, 11, 12).
D: Returns List (12, 12, 12).
E: Returns 12.
---
**Question 11:** Consider the C program:
```c
#include <stdlib.h>
#include <stdio.h>
int *f (int x) {
int y;
int *p = &y;
*p = x * 2;
p = malloc (sizeof (int));
return p;
}
int main (void) {
int *q = f (10);
printf ("result = %d\n", *q);
return 0;
}
```
---](https://content.bartleby.com/qna-images/question/57e74000-fbe3-481d-ab8d-800d62a3b02c/9b785866-177d-4557-b56c-d88eb3c8514b/pz99abp_processed.jpeg)
Transcribed Image Text:Name: ____________________________________
Serial Number: **500**
---
```
Nil
} else {
start :: aux (start + 1, count - 1)
}
aux (init, n)
}
val xs : List[Int] = {
val n = 5
createList (2)
}
```
**What will the value of xs be if the programming language uses dynamic scope?**
A: List (2)
B: List (2, 3, 4, 5, 6)
C: List (2, 3, 4, 5)
D: List (2, 3)
E: List (2, 3, 4)
---
**Question 10:** Consider the Scala code:
```
val q = (x:Int) => List (x, x + 1, x + 2)
```
What will happen when q(10) is executed?
A: Returns 33.
B: Returns 10.
C: Returns List (10, 11, 12).
D: Returns List (12, 12, 12).
E: Returns 12.
---
**Question 11:** Consider the C program:
```c
#include <stdlib.h>
#include <stdio.h>
int *f (int x) {
int y;
int *p = &y;
*p = x * 2;
p = malloc (sizeof (int));
return p;
}
int main (void) {
int *q = f (10);
printf ("result = %d\n", *q);
return 0;
}
```
---
![### CS Exam Questions
#### Question 11
**Which one of the following statements is true about the C code?**
- A: p is a dangling pointer.
- B: The variable y is moved to the heap at runtime.
- C: q is not a dangling pointer.
- D: The assignment to *p is unsafe.
- E: q is a dangling pointer.
#### Question 12
**Consider the Scala code:**
```scala
val q = (x: Int) => List (x, x + 1, x + 2)
```
**What is the type of q?**
- A: Int=>List[Int]
- B: List[Int]
- C: Int=>Int
- D: List[Int=>Int]
- E: List[(Int,Int,Int)]
#### Question 13
**Consider the C code:**
```c
#include "stdio.h"
#include "stdlib.h"
typedef int (*funcptr) (int);
int a;
funcptr f (int x) {
a = x;
int g (int y) { return x + y; }
return &g;
}
int main (void)
{
funcptr h = f (10);
printf ("result = %d\n", h (20));
return 0;
}
```
**Which one of the following statements is true about the C code?**
- A: The call to h is safe when using the GCC extension for nested functions.
- B: The call to h is standard C and does not need the GCC extension for nested functions.
- C: The variable x is moved to the heap at runtime.
- D: The variable a is moved to the heap at runtime.
- E: The call to h is unsafe when using the GCC extension for nested functions.
#### Question 14
**Consider the following code in Java:**
---
**Note:** There are no graphs or diagrams in the image.](https://content.bartleby.com/qna-images/question/57e74000-fbe3-481d-ab8d-800d62a3b02c/9b785866-177d-4557-b56c-d88eb3c8514b/8gxmzi_processed.jpeg)
Transcribed Image Text:### CS Exam Questions
#### Question 11
**Which one of the following statements is true about the C code?**
- A: p is a dangling pointer.
- B: The variable y is moved to the heap at runtime.
- C: q is not a dangling pointer.
- D: The assignment to *p is unsafe.
- E: q is a dangling pointer.
#### Question 12
**Consider the Scala code:**
```scala
val q = (x: Int) => List (x, x + 1, x + 2)
```
**What is the type of q?**
- A: Int=>List[Int]
- B: List[Int]
- C: Int=>Int
- D: List[Int=>Int]
- E: List[(Int,Int,Int)]
#### Question 13
**Consider the C code:**
```c
#include "stdio.h"
#include "stdlib.h"
typedef int (*funcptr) (int);
int a;
funcptr f (int x) {
a = x;
int g (int y) { return x + y; }
return &g;
}
int main (void)
{
funcptr h = f (10);
printf ("result = %d\n", h (20));
return 0;
}
```
**Which one of the following statements is true about the C code?**
- A: The call to h is safe when using the GCC extension for nested functions.
- B: The call to h is standard C and does not need the GCC extension for nested functions.
- C: The variable x is moved to the heap at runtime.
- D: The variable a is moved to the heap at runtime.
- E: The call to h is unsafe when using the GCC extension for nested functions.
#### Question 14
**Consider the following code in Java:**
---
**Note:** There are no graphs or diagrams in the image.
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