多选题Select all the values of x which make the following true: 2x4 = 7x3 + 4x2.A0B-1/2C-1D2E4

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多选题

Select all the values of x which make the following true: 2x4 = 7x3 + 4x2.

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第1题：

Which two statements are true regarding the starting of the database instance using the following command?()SQL>STARTUP UPGRADE

A. It enables all system triggers.

B. It allows only SYSDBA connections.

C. It ensures that all job queues remain active during the upgrade process.

D. It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.

参考答案：B, D

第2题：

Which of the following IP addresses is a private IP address? Select all that apply.()

A.12.0.0.1

B.168.172.19.39

C.172.20.14.36

D.172.33.194.30

E.192.168.42.34

参考答案：C, E

第3题：

Which of the following is true for both bagels and donuts?

A. They both came from Europe.

B. They are both easy to make.

C. They are both sweet.

D. People in New York make them best.

正确答案：A

第4题：

Which of the following statements eliminates all but one of each set of duplicate rows in the DEPT column in the STAFF table?（）

A、SELECT UNIQUE dept FROM staff
B、SELECT DISTINCT dept FROM staff
C、SELECT (dept) UNIQUE FROM staff
D、SELECT (dept) DISTINCT FROM staff

正确答案:B

第5题：

Which of the following is true regarding Label Distribution Protocol （LDP）？（）

A、It is a label distribution protocol for MPLS
B、It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a network
C、Tag distribution Protocol （TDP） was the basis for LDP
D、All of the above are true

正确答案:D

第6题：

Given two different character sets (A and B), which of the following must be true for A to be considered a strict superset of B?()

A. A must contain all of the characters defined in B

B. A must be Unicode

C. The encoded values in A must match the encoded values in B for all characters defined in B

D. A must be a multibyte character set

E. The encoded values in A must match the encoded values in B for all numeric and alphabetic characters in B

参考答案：A, C

第7题：

Which of the following statements are true for routers but not true for Layer 3 Ethernet switches？（Choose all that apply.）（）

A、May have Ethernet as well as non-Ethernet interfaces
B、Traditionally used as a standalone device for inter-VLAN communication
C、Makes use of TCAMs
D、Uses subinterfaces to define trunks
E、Can use both Layer 2 and Layer 3 to make forwarding decisions
F、Allows the definition of Switched Virtual Interfaces（SVI）

正确答案:A,B,D

第8题：

Evaluate the following command:Which statement is true regarding the above command?()

A. The LOB matically compressed.

B. The LOB values are cached bvalues are autoy default in the buffer cache.

C. The LOB values are automatically stored in encrypted mode.

D. All LOB data that is identical in two or more rows in a LOB column share the same data blocks.

参考答案：D

第9题：

Which statement is true regarding the INTERSECT operator?（）

A、It ignores NULL values
B、Reversing the order of the intersected tables alters the result
C、The names of columns in all SELECT statements must be identical
D、The number of columns and data types must be identical for all SELECT statements in the query

正确答案:D

第10题：

Evaluate the following command： SQL> CREATE TABLE design_data （id NUMBER， doc CLOB） LOB（doc） STORE AS SECUREFILE（DEDUPLICATE）； Which statement is true regarding the above command？（）

A、 The LOB values are automatically compressed.
B、 The LOB values are cached by default in the buffer cache.
C、 The LOB values are automatically stored in encrypted mode.
D、 All LOB data that is identical in two or more rows in a LOB column share the same data blocks.

正确答案:D

多选题Select all the values of x which make the following true: 2x4 = 7x3 + 4x2.A0B-1/2C-1D2E4

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