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name the three major set of files on disk that compose a database in oraclethere are three main sets of files on disk that compose a database all the
what do you mean by correlated subquerysubqueries or nested queries are used to bring back a set of rows to be used by the parent query depending on
what is a phantom deadlock in distributed deadlock detection the delay in propagating local information might cause the deadlock detection algorithms
what do you mean by atomicity and aggregation atomicity either all actions are carried out or none are users should not have to worry about the
what is system catalog or catalog relation how is better known asa rdbms maintains a explanation of all the data that it contains information about
what are partial alternate artificial compound and natural keypartial key it is a set of attributes that can uniquely recognize weak entities and
what is functional dependency a functional dependency is shown by x y among two sets of attributes x and y that are subsets of r specifies a
what is normalizationit is a method of analysing the given relation schemas based on their functional dependencies fds and primary key to attain the
how does tuple-oriented relational calculus vary from domain-oriented relational calculusthe tuple-oriented calculus uses a tuple variables ie
what is dml data manipulation languagethis language that enable user to access or manipulate data as organised by appropriate data modelprocedural
what is data storagethe storage structures and access methods used by database system are specified by a set of explanation in a special type of ddl
what is object oriented model this model is based on collection of objects an object has values stored in instance variables with in the object an
what is e-r modelthis data model is based on real world that having of basic objects called entities and of relationship between these objects
what is a view how it is related to data independencea view might be thought of as a virtual table that is a table that does not really exist in its
what is system r what are its two major subsystemssystem r was intended and developed over a period of 1974-79 at ibm san jose research center it is
what is a java package and how is it used a java package is a naming context for classes and interfaces a package is used to make a separate name
how is final different from finally and finalize final is a modifier which can be applied to a class or a method or a variable final class cant be
how to define a constant variable in javathe variable should be declared as static and final so only one copy of the variable exists for all
what are instance variablesinstance variables are those which are explained at the class level instance variables require not be initialized before
what are local variableslocal varaiables are those which are declared within a block of code like methods local variables should be initialised
what is difference among path and classpathpath and classpath are operating system level environment varialespath is used explain where the system
what is a pointer and does java support pointerspointer is a reference handle to a memory location improper handling of pointers leads to memory
what is the difference between a jdk and a jvmjdk is java development kit which is for development purpose and it contains execution environment
what do you mean by platform independenceplatform independence means that we can write and compile the java code in one platform eg windows and can
what are netbios and netbeuinetbios is a programming interface that permits io requests to be sent to and received from a remote computer and it