DATABASE SYSTEM CONCEPTS LCPO
7th Edition
ISBN: 9781265586577
Author: SILBERSCHATZ
Publisher: MCG
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Expert Solution & Answer
Chapter 2, Problem 14E
a.
Explanation of Solution
Query:
∏ID, person_name(σcompany_name=”BigBank”(works))
Explanation:
- The given query is used to find ID and name of each employee who works for BigBank in the employee
database ...
b.
Explanation of Solution
Query:
πID, person_name, city ( employee ⋈employee.id =works.id ( σcompany_name = "BigBank" ( works )) )
Explanation:
- The given query is used to find ID, name and city of residence of each employee who works for BigBank in the employee database...
c.
Explanation of Solution
Query:
πID, person_name, street, city ( σ(company_name = "BigBank" ∧ salary > 10000 ( works ⋈employee.id = works.id employee ))
Explanation:
- The given query is used to find ID, name, street address and city of residence of each employee who works for BigBank and earns more than $10000 in the employee database...
d.
Explanation of Solution
Query:
∏ID, person_name
(σemployee.city=company.city(employee ⋈employee.id=woks.id works
⋈works.company_name=company.company_name company))
Explanation:
Expert Solution & Answer
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A ROP (Return-Oriented Programming) attack can be used to execute arbitrary
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#Allocate 8 bytes for buffer
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0x7fffffffdfc0
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Problem 1 [15 points]
The code below is buggy. Assume the code compiles. Briefly:
1). Identify the problem with the code (e.g., can access memory out of bounds) and
2). Suggest a solution (e.g., check the length).
Question 1
1 #define BLENGTH 5
2 int b[BLENGTH];
3 void copy_from_global_int_array_b (int n, int* dest) {
4
5 }
*dest = b[n];
==
Which statement regarding SGA_MAX_SIZE is true?
SGA_MAX_SIZE is modifiable after an instance is started, only when Automatic Memory Management is used.
SGA_MAX_SIZE is not dyamically modifiable.
SGA_MAX_SIZE is ignored when MEMORY_TARGET > 0.
SGA-MAX_SIZE must be specified when SGA_TARGET > 0
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