7. For the process shown in the table below: [time unit: ms]
  
Please find the average waiting time if the processes are conducted in Preemptive-Priority.
(A) 3
(B) 4
(C) 5
(D) 6
(E) 7

8. Suppose we have a processor with a base CPI of 1.0, assuming all references hit in the main memory, and the main memory access time of 100 clock cycles, include all the miss handling. Suppose 60% of instructions would access memory, and the miss rate of instruction cache is 0.2%, the miss rate of data instruction cache is 1%. The effective CPI = n. What is the value of round(n) mod 5? (A) 0 (B) 1 (C) 2 (D) 3 (E) 4

9. Your company has a class C network 192.168.113.0. Which of the following address pairs is located in the same subnet if you want to divide the network into six useable subnets? (A) (192.168.113.1, 192.168.113.254) (B) (192.168.113.94, 192.168.113.97) (C) (192.168.113.38, 192.168.114.46) (D) (192.168.113.36, 192.168.113.48) (E) (192.168.113.157, 192.168.113.165)

10. Which of the following statements is CORRECT for the TCP/IP network protocols? (A) TCP is called a connectionless communication while UDP is called a connection-oriented communication. (B) Router is an OSI Layer 2 device which can only forward data based on the MAC address. (C) ARP (Address Resolution Protocol) can be used to change several private addresses under the LAN (Local Area Network) to a single public IP address. (D) For establishing a reliable connection, UDP uses a three-way handshake to enhance the robustness. (E) The flags in the TCP packet are used to indicate a particular state during the TCP conversation.

11. Given a database table named “animal” with four columns, please find out a CORRECT SQL command that can obtain the desired output as below. (A) SELECT category, count(animalid) as countaid FROM animal WHERE born ＞ '2023-02- 14' AND count(animalid)＞=2 GROUP BY category ORDER BY count(animalid) DESC, category ASC (B) SELECT category, count(animalid) as countaid FROM animal WHERE born ＞ '2023-02- 14' GROUP BY category HAVING count(animalid)＞=2 ORDER BY count(animalid) DESC, category ASC (C) SELECT category, count(animalid) as countaid FROM animal GROUP BY category HAVING count(animalid)＞=2 AND born ＞ '2023-02-14' ORDER BY count(animalid), category DESC (D) SELECT category, count(animalid) as countaid FROM animal WHERE count(animalid)＞=2 GROUP BY category HAVING born ＞ '2023-02-14' ORDER BY count(animalid) DESC, category ASC (E) SELECT category, count(animalid) as countaid FROM animal WHERE born ＞ '2023-02- 14' GROUP BY category ORDER BY count(animalid) DESC, category ASC

12. Given a binary tree whose prefix order is ABCDEF and infix CBDAEF, what is its postfix order? (A) BCDFEA (B) CBDFEA (C) CDBFEA (D) CDBEFA (E) Undecided

13. What is an IP address? What are the differences between IPv4 and IPv6 addresses? (A) An IP address is a numerical identifier that identifies the location of a host or network device on a network. IPv4 addresses are 32-bit addresses, while IPv6 addresses are 128-bit addresses. (B) An IP address is an alphanumeric code used to identify the location of a device on the Internet. IPv4 addresses are 32-bit addresses, while IPv6 addresses are 64-bit addresses. (C) An IP address is a numerical identifier that identifies the location of a host or network device on the Internet. IPv4 addresses are 128-bit addresses, while IPv6 addresses are 32-bit addresses. (D) An IP address is an alphanumeric code used to identify the location of a device on a network. IPv4 addresses are 128-bit addresses, while IPv6 addresses are 32-bit addresses. (E) An IP address is a numerical identifier that identifies the location of a host or network device on a network. There are no significant differences between IPv4 and IPv6 addresses.

14. According to the three database tables listed below, which of the following statements is CORRECT if you want to create a relational database model? (A) There is no possible foreign key that can be used in“Purchase”table. (B) EID can be regarded as a primary key in“Purchase”table. (C) There is a one-to-many relationship between“Employee”and“Purchase”tables. (D) Every table must have a foreign key to uniquely identify a particular row. (E) If we want to query Employee’s names in the Purchase with PID= "1234" and "1238", it is a better approach to use UNION in SQL command.

15. Which of the followings is the path for BFS algorithm? (The starting point is the first element of each of the following path) (A) H→G→A→J→B→C→D→E→F→I (B) B→J→C→E→F→I→D→A→G→H (C) J→A→G→H→B→C→D→E→I→F (D) H→B→D→I→F→G→E→A→C→J (E) H→G→A→J→C→E→I→F→D→B

16. Which one of the following statements is the biggest, when n approaches to ∞? (A) nlog n (B) (C) n! (D) (E)

17. Which is the answer of printf? (A) 4 (B) 5 (C) 6 (D) 7 (E) 8

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