更多“多选题Which four are valid Oracle constraint types? ()ACASCADEBUNIQUECNONUNIQUEDCHECKEPRIMARY KEYFCONSTANTGNOT NULL”相关问题
  • 第1题:

    Which two statements are true about constraints? ()

    • A、The UNIQUE constraint does not permit a null value for the column.
    • B、A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.
    • C、The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.
    • D、The NOT NULL constraint ensures that null values are not permitted for the column.

    正确答案:B,D

  • 第2题:

    Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?()

    • A、ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;
    • B、ALTER TABLE customers MODIFY CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;
    • C、ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn NOT NULL;
    • D、ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn IS NOT NULL;
    • E、ALTER TABLE customers MODIFY name CONSTRAINT cust_name_nn NOT NULL;
    • F、ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name NOT NULL;

    正确答案:C

  • 第3题:

    多选题
    Which modifiers and return types would be valid in the declaration of a working main() method for a Java standalone application?()
    A

    private

    B

    final

    C

    static

    D

    int

    E

    abstract


    正确答案: A,B
    解析: 暂无解析

  • 第4题:

    多选题
    Which two are valid IS-IS PDU types?()
    A

    broadcast hellos

    B

    Level 1 LAN hellos

    C

    Point-to-point hellos

    D

    Level 2 point-to-point hellos


    正确答案: D,A
    解析: 暂无解析

  • 第5题:

    多选题
    You need to create a column that allows you to createa unique constraint. Which two column definitions should you choose?()
    A

    nvarchar(100) NULL

    B

    nvarchar(max) NOT NULL

    C

    nvarchar(100) NOT NULL

    D

    nvarchar(100) SPARSE NULL


    正确答案: D,B
    解析: 暂无解析

  • 第6题:

    多选题
    Which four service offerings are included in Oracle Public Cloud?()
    A

    Database Service

    B

    Data Service

    C

    Java Service

    D

    Security Service

    E

    .NET Service

    F

    SOA Service


    正确答案: F,C
    解析: 暂无解析

  • 第7题:

    多选题
    Which two statements are true about constraints? ()
    A

    The UNIQUE constraint does not permit a null value for the column.

    B

    A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.

    C

    The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.

    D

    The NOT NULL constraint ensures that null values are not permitted for the column.


    正确答案: A,B
    解析: 暂无解析

  • 第8题:

    多选题
    Which four are types of functions available in SQL? ()
    A

    string

    B

    character

    C

    integer

    D

    calendar

    E

    numeric

    F

    translation

    G

    date

    H

    conversion


    正确答案: H,G
    解析: 暂无解析

  • 第9题:

    多选题
    Which of the following three port types are valid Spanning Tree port types?(Choose the best threeanswers.)()
    A

    Designated port

    B

    Nonswitch port

    C

    Switch port

    D

    Nonroot port

    E

    Nondesignated port

    F

    Root port


    正确答案: A,B
    解析: 暂无解析

  • 第10题:

    多选题
    Examine the following statement that is used to modify the constraint on the SALES table: SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE; Which three statements are true regarding the above command()
    A

    The constraint remains valid.

    B

    The index on the constraint is dropped.

    C

    It allows the loading of data into the table using SQL*Loader.

    D

    New data conforms to the constraint, but existing data is not checked

    E

    It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.


    正确答案: C,A
    解析: 暂无解析

  • 第11题:

    单选题
    Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?()
    A

    ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;

    B

    ALTER TABLE customers MODIFY CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;

    C

    ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn NOT NULL;

    D

    ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn IS NOT NULL;

    E

    ALTER TABLE customers MODIFY name CONSTRAINT cust_name_nn NOT NULL;

    F

    ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name NOT NULL;


    正确答案: F
    解析: 暂无解析

  • 第12题:

    多选题
    Which four types of object can be thrown using the throw statement?()
    A

    Error

    B

    Event

    C

    Object

    D

    Exception

    E

    Throwable

    F

    Runtime Exception


    正确答案: A,D,E,F
    解析: 暂无解析

  • 第13题:

    You executed the following code:   SQL> CERATE TABLE COUNTRY   (COUNTRY_ID CHAR(2) CONSTRAINT COUNTRY_ID_nn NOT NULL,   COUNTRY_NAME VARCHAR2(20),   CURRENCY_NAME VARCHAR2(20),   CONSTRAINT COUNTRY_ID_PK PRIMARY KEY (COUNTRY_ID))   ORGANIZATION INDEX;   Which types of tables will be created automatically?()

    • A、 journal table
    • B、 clustered table
    • C、 mapping table
    • D、 partitioned table

    正确答案:C

  • 第14题:

    You need to design the restrictions on the Bank.Customers table. Which three actions should you perform?()

    • A、Design a trigger that verifies that the first names and surnames are not empty strings.
    • B、Design a check constraint that verifies that the first names and surnames are not empty strings.
    • C、Design a check constraint that uses a CLR user-defined function to verify that either the phone number is a null value or the format of the phone number is valid.
    • D、Design a trigger that uses a CLR user-defined function to verify that either the phone number is a null value or the format of the phone number is valid.
    • E、Design a check constraint that ensures that the phone number cannot be changed from a valid format to a null value or to an invalid format.
    • F、Design a trigger that ensures that the phone number cannot be changed from a valid format to a null value.

    正确答案:B,C,F

  • 第15题:

    多选题
    Which three menu item types are valid in a menu module?()
    A

    Magic

    B

    Plain

    C

    Check

    D

    List item

    E

    Divider


    正确答案: D,A
    解析: 暂无解析

  • 第16题:

    多选题
    Which three message types are valid PIMv2 message types?()
    A

    Register

    B

    Register-Stop

    C

    Join/Prune

    D

    Reject

    E

    Register-Prune

    F

    Register-Join


    正确答案: F,D
    解析: 暂无解析

  • 第17题:

    多选题
    Which of the following are valid program types for a lightweight job?()
    A

    PLSQL_BLOCK

    B

    EXECUTABLE

    C

    JAVA_STORED_PROCEDURE

    D

    STORED_PROCEDURE

    E

    EXTERNAL


    正确答案: C,B
    解析: 暂无解析

  • 第18题:

    多选题
    You need to design the restrictions on the Bank.Customers table. Which three actions should you perform?()
    A

    Design a trigger that verifies that the first names and surnames are not empty strings.

    B

    Design a check constraint that verifies that the first names and surnames are not empty strings.

    C

    Design a check constraint that uses a CLR user-defined function to verify that either the phone number is a null value or the format of the phone number is valid.

    D

    Design a trigger that uses a CLR user-defined function to verify that either the phone number is a null value or the format of the phone number is valid.

    E

    Design a check constraint that ensures that the phone number cannot be changed from a valid format to a null value or to an invalid format.

    F

    Design a trigger that ensures that the phone number cannot be changed from a valid format to a null value.


    正确答案: B,C,F
    解析: 暂无解析

  • 第19题:

    多选题
    Which three TLV types are valid in an IS-IS Hello PDU?()
    A

    TLV 10 Authentication

    B

    TLV 1 Area Addresses

    C

    TLV 211 Graceful Restart

    D

    TLV 137 Dynamic Hostname Resolution

    E

    TLV 14 ABRs


    正确答案: B,A
    解析: 暂无解析

  • 第20题:

    多选题
    Which four types of objects can be thrown using the throw statement?()
    A

    Error

    B

    Event

    C

    Object

    D

    Exception

    E

    Throwable

    F

    RuntimeException


    正确答案: F,D
    解析: 暂无解析

  • 第21题:

    多选题
    Which two are valid locking levels that are used by transactions in an Oracle database?()
    A

    row level

    B

    block level

    C

    object level

    D

    schema level

    E

    database level


    正确答案: D,E
    解析: 暂无解析

  • 第22题:

    多选题
    Which of the following are valid program types for a lightweight job?()
    A

    PLSQL_BLOCK PLSQL

    B

    EXECUTABLE

    C

    JAVA_STORED_PROCEDURE

    D

    STORED_PROCEDURE

    E

    EXTERNAL


    正确答案: B,A
    解析: 暂无解析

  • 第23题:

    多选题
    Which four are valid Oracle constraint types? ()
    A

    CASCADE

    B

    UNIQUE

    C

    NONUNIQUE

    D

    CHECK

    E

    PRIMARY KEY

    F

    CONSTANT

    G

    NOT NULL


    正确答案: B,A
    解析: 暂无解析

  • 第24题:

    单选题
    You executed the following code:   SQL> CERATE TABLE COUNTRY   (COUNTRY_ID CHAR(2) CONSTRAINT COUNTRY_ID_nn NOT NULL,   COUNTRY_NAME VARCHAR2(20),   CURRENCY_NAME VARCHAR2(20),   CONSTRAINT COUNTRY_ID_PK PRIMARY KEY (COUNTRY_ID))   ORGANIZATION INDEX;   Which types of tables will be created automatically?()
    A

     journal table

    B

     clustered table

    C

     mapping table

    D

     partitioned table


    正确答案: A
    解析: 暂无解析