单选题You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 1000 bytes. The column can currently hold 500 bytes per value. The table contains 20000 rows. Whi

题目
单选题
You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 1000 bytes. The column can currently hold 500 bytes per value. The table contains 20000 rows. Which statement is valid?（）
A

ALTER TABLE commercials MODIFY (description CHAR2(1000));

B

ALTER TABLE commercials CHANGE (description CHAR2(1000));

C

ALTER TABLE commercials CHANGE (description VARCHAR2(1000));

D

ALTER TABLE commercials MODIFY (description VARCHAR2(1000));

E

You cannot increase the size of a column if the table has rows.

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4.You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform? （）A. MERGEB. INSERTC. UPDATED. ADDE. ENTERF. You cannot enter the phone numbers for the existing employee records.

更多“You need to change the definition of an existing table. The”相关问题

  • 第1题：

    资料：Changing careers is becoming more popular. Not just because there are more career options available, but also out of necessity. As new industries arise, others die. It's up to you to figure out if your career is still going to be around in the next 5-10 years. Some studies say we could have as many as nine careers in our professional lifetime. Which begs the question: do you know what it takes to successfully change career lanes repeatedly?
    Switching careers is like changing highway lanes: you must signal!
    If you want to move in a new career direction, you need to signal to the professional world you intend to make a change. You need to do it with purpose and specificity. It must look well-thought out and intentional. Otherwise, people will A） not know you are looking to make the change, and B）assume you are doing it because you failed in your current career in some way.
    1. Give the logic and passion behind your career change.
    When signaling to your network you want to switch careers you must explain why both your head and heart are ready to change. Perhaps there are financial or geographic reasons （i.e., you need to relocate or make more money）. But, you must also convey the excitement and sincere desire you have for this new career （i.e., you want to make a difference or work on a particular type of problem that needs to be solved）.
    2. Build a marketing campaign for your business-of-one.
    Most employers prefer to hire people with previous experience. Thus, you're going to need a way to convey to them your transferable skills from your former career path will be equally valuable. The best way to do this is to create a targeted list of employers you want to work for and then strategically network with their employees. The more conversations and connections you can have within your new career path, the easier it will be to convince someone to hire you in spite of your lack of experience.
    To sum it up … Once you commit to a career change, the secret to success is to make sure everyone knows about it. Otherwise, you will struggle to change career lanes efficiently and effectively.

    What does the sentence “you must signal!” mean in paragraph 2?

    A.You need to have more conversations and connections within your new career path.
    B.You need to build a marketing campaign for your business-of-one.
    C.You need to give the logic and passion behind your career change.
    D.You need to make sure everyone knows about it.

    答案：D
    解析：
    本题考查的是词义判断。
    【关键词】”you must signal’;mean;in paragraph 2
    【主题句】第2自然段 Switching careers is like changing highway lanes: you must signal! If you want to move in a new career direction, you need to signal to the professional world you intend to make a change.转行就像变换高速公路车道，你必须发出信号。如果你想进入新的职业方向，你需要向职业世界表明你打算做出改变。
    【解析】题干意为“第2自然段的‘you must signal!’是什么意思？” 选项A意为“在新的职业道路上，你需要有更多的对话和联系”；选项B意为“您需要为您的企业创建营销活动”；选项C意为“在职业变化背后，你需要逻辑和激情”；选项D意为“你需要确保每个人都知道”；根据主题句可知，转行需要提前让别人知道你要转行，故选项D正确。

  • 第2题：

    You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 1000 bytes. The column can currently hold 500 bytes per value. The table contains 20000 rows. Which statement is valid?（）

    • A、ALTER TABLE commercials MODIFY (description CHAR2(1000));
    • B、ALTER TABLE commercials CHANGE (description CHAR2(1000));
    • C、ALTER TABLE commercials CHANGE (description VARCHAR2(1000));
    • D、ALTER TABLE commercials MODIFY (description VARCHAR2(1000));
    • E、You cannot increase the size of a column if the table has rows.

    正确答案:D

  • 第3题：

    You are running Linux 2.0.36 and you need to add a USB mouse to your system. Which of the following statements is true？（）

    • A、 You need to rebuild the kernel.
    • B、 You need to upgrade the kernel
    • C、 You need to load the USB modules for your existing modular kernel.
    • D、 USB support is not available in Linux.

    正确答案:B

  • 第4题：

    You are managing a database for which incremental backups can be very time consuming. In order to perform optimized incremental backups you enable the block change tracking feature.How would you instruct RMAN to use the block change tracking feature when performing incremental backups？（）

    • A、 You need to mention it with every BACKUP command.
    • B、 The block change tracking feature is used automatically by RMAN.
    • C、 You need to configure it using the CONFIGURE command.
    • D、 You need to set the necessary initialization parameters to direct RMAN to use the feature.

    正确答案:B

  • 第5题：

    You are designing a plan to migrate an existing application to Windows Azure. The application currently resides on a server that has 20 GB of hard disk space.  You need to recommend the smallest compute instance size that provides local storage equivalent to that of the existing server.  Which size should you recommend？（）

    • A、 ExtraSmall
    • B、 ExtraLarge
    • C、 Small
    • D、 Large

    正确答案:A

  • 第6题：

    You are designing a plan for migrating an existing Microsoft SQL Server 2008 database to SQL Azure.The database includes a SQL Server Agent job that cleans the application log table.   You need to recommend an approach for ensuring that the SQL Server Agent job continues to run without modification.  What should you recommend？（）

    • A、 Use the SQL Azure Data Sync service.
    • B、 Run the SQL Server Agent in SQL Azure.
    • C、 Use SQL Server Integration Services （SSIS） to connect to SQL Azure.
    • D、 Connect the existing on-premise SQL Server Agent jobs to SQL Azure.

    正确答案:D

  • 第7题：

    You have a computer that runs Windows 7. You need to configure the monitor on the computer to turn off after 30 minutes of inactivity. What should you do？ （）

    • A、From Personalization，change the theme.
    • B、From Display，change the display settings.
    • C、From Action Center，change the Action Center settings.
    • D、From Power Options，change the current power plan settings.

    正确答案:D

  • 第8题：

    单选题
    You are running Linux 2.0.36 and you need to add a USB mouse to your system. Which of the following statements is true？（）
    A

     You need to rebuild the kernel.

    B

     You need to upgrade the kernel

    C

     You need to load the USB modules for your existing modular kernel.

    D

     USB support is not available in Linux.


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform?（）
    A

    MERGE

    B

    INSERT

    C

    UPDATE

    D

    ADD

    E

    ENTER

    F

    You cannot enter the phone numbers for the existing employee records.


    正确答案： E
    解析： 暂无解析

  • 第10题：

    单选题
    You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows. Which statement is valid?（）
    A

    ALTER TABLE commercials MODIFY (description CHAR2(2000));

    B

    ALTER TABLE commercials CHANGE (description CHAR2(2000));

    C

    ALTER TABLE commercials CHANGE (description VARCHAR2 (2000));

    D

    ALTER TABLE commercials MODIFY (description VARCHAR2 (2000));

    E

    You cannot increase the size of a column if the table has rows.


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    You have an existing Windows Communication Foundation (WCF) service that exposes a service contract over HTTP. You need to expose that contract over HTTP and TCP. What should you do?（）
    A

    Add a net.tcp base address to the host.

    B

    Add an endpoint configured with a netTcpBinding.

    C

    Add an endpoint behavior named netTcpBehavior to the existing endpoint.

    D

    Add a binding configuration to the existing endpoint named netTcpBinding.


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    You install a TV tuner card on your computer.  You need to record two different TV shows that run on two different channels at the same time.  What should you do？（）
    A

    Install a TV tuner card that supports high-definition TV （HDTV）.

    B

    Install an additional TV tuner card.

    C

    Contact your TV cable or satellite provider to add support for concurrent recording.

    D

    Remove the existing TV tuner card. Install a new TV tuner card that supports MPEG-2 video hardware or software video decoding.


    正确答案： B
    解析： 暂无解析

  • 第13题：

    You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform?（）

    • A、MERGE
    • B、INSERT
    • C、UPDATE
    • D、ADD
    • E、ENTER
    • F、You cannot enter the phone numbers for the existing employee records.

    正确答案:C

  • 第14题：

    You are designing a plan to migrate an existing application to Windows Azure.  The application currently resides on a server that has 768 MB of memory and multiple cores. You need to recommend the smallest compute instance size that is equivalent to the existing server.  Which size should you recommend？（）

    • A、 Small
    • B、 Medium
    • C、 Large
    • D、 ExtraSmall

    正确答案:B

  • 第15题：

    You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform?（）

    • A、MERGE
    • B、INSERT
    • C、UPDATE
    • D、ADD
    • E、ENTER
    • F、You cannot enter the phone numbers for the existing employee records.

    正确答案:C

  • 第16题：

    You are using Oracle Database 10g. Which statement regarding an incomplete recovery is true？（）

    • A、 You do not need to restore all the data files.
    • B、 You do not need to open the database with the RESETLOGS operation
    • C、 You do not need to perform a full backup after the RESETLOGS operation.
    • D、 You do not need to recover all the data files to the same system change number （SCN）.

    正确答案:C

  • 第17题：

    You need to design a domain model that meets the company business and security requirements for controlling access to the new Web-based ordering application. What should you do？（）

    • A、Create a child OU within the existing domain
    • B、Create a child domain of the existing domain
    • C、Create a new domain in a new forest. Configure the new domain to trust the existing domain
    • D、Create a new tree in the existing forest. Configure the new domain to trust the existing domain

    正确答案:C

  • 第18题：

    You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named Dworks in the instance. The Dworks database has a table named Orderthings. The Orderthings table is partitioned on the OrderId column. The first partition contains integer values greater than 100,000, while the second partition contains integer values between 1 and 100,000. You have to add a new partition. The new partition should contain integer values greater than 200,000. What should you do? （）

    • A、A new partition function should be created 
    • B、You should change the existing partition scheme 
    • C、You should use a Merge clause to change the existing partition function 
    • D、You should use a Split clause to change the existing partition function 

    正确答案:D

  • 第19题：

    单选题
    You are changing the security settings of a file named MyData.xml.You need to preserve the existing inherited access rules.You also need to prevent the access rules from inheriting changes in the future.   Which code segment should you use？（）
    A

    A

    B

    B

    C

    C

    D

    D


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    You are managing a database for which incremental backups can be very time consuming. In order to perform optimized incremental backups you enable the block change tracking feature.How would you instruct RMAN to use the block change tracking feature when performing incremental backups？（）
    A

     You need to mention it with every BACKUP command.

    B

     The block change tracking feature is used automatically by RMAN.

    C

     You need to configure it using the CONFIGURE command.

    D

     You need to set the necessary initialization parameters to direct RMAN to use the feature.


    正确答案： C
    解析： 暂无解析

  • 第21题：

    多选题
    In which scenarios would you rebuild an index？（）
    A

    when you need to disable the index usage

    B

    when you need to change storage options

    C

    when you need to enable index monitoring

    D

    when you need to move the index to another tablespace


    正确答案： D,B
    解析： 暂无解析

  • 第22题：

    单选题
    You are using Oracle Database 10g. Which statement regarding an incomplete recovery is true？（）
    A

     You do not need to restore all the data files.

    B

     You do not need to open the database with the RESETLOGS operation

    C

     You do not need to perform a full backup after the RESETLOGS operation.

    D

     You do not need to recover all the data files to the same system change number （SCN）.


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform?（）
    A

    MERGE

    B

    INSERT

    C

    UPDATE

    D

    ADD

    E

    ENTER

    F

    You cannot enter the phone numbers for the existing employee records.


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    You need to create a class definition that is interoperable along with COM.You need to ensure that COM applications can create instances of the class and can call the GetAddress method. Which code segment should you use？（）
    A

    A

    B

    B

    C

    C

    D

    D


    正确答案： A
    解析： 暂无解析

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