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Which are /SQL*Plus commands? （）
A . INSERT
B . UPDATE
C . SELECT
D . DESCRIBE
E . DELETE
F . RENAME
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Which are valid identifiers？（）
A . _class
B . $value$
C . zer@
D . ¥ngstr
E . 2muchuq
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Which four statements are true？（）
A . Has-a relationships should never be encapsulated.
B . Has-a relationships should be implemented using inheritance.
C . Has-a relationships can be implemented using instance variables.
D . Is-a relationships can be implemented using the extends keyword.
E . Is-a relationships can be implemented using the implements keyword.
F . An array or a collection can be used to implement a one-to-many has-a relationship.
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Which four are true？（）
A . Has-a relationships should never be encapsulated.
B . Has-a relationships should be implemented using inheritance.
C . Has-a relationships can be implemented using instance variables.
D . Is-a relationships can be implemented using the extends keyword.
E . Is-a relationships can be implemented using the implements keyword.
F . An array or a collection can be used to implement a one-to-many has-a relationship.
G . The relationship between Movie and Actress is an example of an is-a relationship.
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Which two are equivalent？ （）
A . 16>4
B . 16/2
C . 16*4
D . 16>>2
E . 16/2^2
F . 16>>>2
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Which two are equivalent？（）
A . 3/2
B . 3<2
C . 3*4
D . 3<<2
E . 3*2^2
F . 3<<<2
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Which two are equivalent？（）
A . 3/2
B . 3<2
C . 3*4
D . 3<<2
E . 3*2^2
F . 3<<<2
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Which are not Java keywords？ （）
A . TRUE
B . sizeof
C . const
D . super
E . void
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Which three statements are true?（）
A . A final method in class X can be abstract if and only if X is abstract.
B . A protected method in class X can be overridden by any subclass of X.
C . A private static method can be called only within other static methods in class X.
D . A non-static public final method in class X can be overridden in any subclass of X.
E . A public static method in class X can be called by a subclass of X without explicitly referencing the class X.
F . A method with the same signature as a private final method in class X can be implemented in a subclass of X.
G . A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.
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Which three are Cisco architectures?（）
A . cloud computing
B . consumerization
C . collaboration
D . virtualization
E . digital media
F . borderless network
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Which two statements are true？（）
A . It is possible for more than two threads to deadlock at once.
B . The JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.
C . Deadlocked threads release once their sleep（） method’s sleep duration has expired.
D . Deadlocking can occur only when the wait（）， notify（）， and notifyAll（） methods are used incorrectly.
E . It is possible for a single-threaded application to deadlock if synchronized blocks are used incorrectly.
F . If a piece of code is capable of deadlocking， you cannot eliminate the possibility ofdeadlocking by insertinginvocations of Thread.yield（）.
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Which three statements are true？（）
A . The default constructor initializes method variables.
B . The default constructor has the same access as its class.
C . The default constructor invoked the no-arg constructor of the superclass.
D . If a class lacks a no-arg constructor， the compiler always creates a default constructor.
E . The compiler creates a default constructor only when there are no other constructors for the class.
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Which two choices are equivalent？（）
A . 16 > 4
B . 16 / 2
C . 16 * 4
D . 16 >> 2
E . 16 / 22
F . 16 >>> 2
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Which are DML statements? （）
A . COMMIT…
B . MERGE…
C . UPDATE…
D . DELETE…
E . CREATE…
F . DROP&helli
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Which three are true? （）
A . A MERGE statement is used to merge the data of one table with data from another.
B . A MERGE statement replaces the data of one table with that of another.
C . A MERGE statement can be used to insert new rows into a table.
D . A MERGE statement can be used to update existing rows in a table.
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多糖（polysaccharide）
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Which two are true？（）
A . An encapsulated， public class promotes re-use.
B . Classes that share the same interface are always tightly encapsulated.
C . An encapsulated class allows subclasses to overload methods， but does NOT allow overriding methods.
D . An encapsulated class allows a programmer to change an implementation without affecting outside code.
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Two types of anchor shackles which are currently available are（）.
A . U-Type and posilok shackles
B . C-Type and wedge shackles
C . D-Type and bow shackles
D . wedge and kenter shackle
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Which two statemets are true？（）
A . DPT/RPR uses a bi-directional ring consisting of two symmetric counter rotating fibre rings.
B . DPT/RPR is defined in the IEEE 802.17 standard and it uses Token Bucket system to avoid collisions on the fiber.
C . In DPT/RPR rings， data packets can be sent in one direction （downstream） and the corresponding control packets in the opposite direction （upstream），thus using both fibres concurrently to maximise bandwidth.
D . DPT/RPR can be deployed in the Core of the SP networks where point-to-point POS links are used tomake best use of the Bandwidth.
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土壤多糖 soil polysaccharide
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Which two statements are true?（）
A . It is possible for more than two threads to deadlock at once.
B . The JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.
C . Deadlocked threads release once their sleep() method's sleep duration has expired.
D . Deadlocking can occur only when the wait(), notify(), and notifyAll() methods are used incorrectly.
E . It is possible for a single-threaded application to deadlock if synchronized blocks are used incorrectly.
F . If a piece of code is capable of deadlocking, you cannot eliminate the possibility of deadlocking by inserting invocations of Thread.yield().
