What is the error message that you would get if you try to assign “Null” to an integer variable ?
Answer : error message: cannot convert null to int...
What is the difference between shell script and perl ?
Answer : Shell script is platform(OS) only for Unix flavour...
Difference between Procedure and Function ?
Answer : A procedure is a named PL/SQL block...
What is the maximum size of a row in oracle 9i ?
Answer : The oracle is Unlimited of...
Lazy writer in Memory ?
Answer : Lazy write is an effect caused by the use of a write-back cache...
What is the difference between the SubQuery and Corelated SubQuery ?
Answer : The inner query is executed only once...
What is the Difference between join and union ?
Answer : The union operator combines the results of two or more queries into a single result set...
What is the SQLCode -501 ?
Answer : sqlcode -501 pops up to show...
What is the difference between a HAVING CLAUSE and a WHERE CLAUSE ?
Answer : The HAVING clause sets conditions on the GROUP BY...
Difference between Clustered and Non-clustered index ?
Answer : Cluster index: Clustered index will be created...
What is an Index ?
Answer : Index is a database object which improves the efficiency of the query...
How to find the second highest salary from emp table ?
Answer : Select max(sal)...
What is the difference between primary, partition and clustering key in Cassandra ?
Answer : In Cassandra, a table contain a number of rows.
What is the difference between Cassandra and Hadoop ?
Answer : All nodes are same in Peer-to-Peer Distributed architecture. Master/Slave. Name Node act as Master and data node...
What is the virtual node in Cassandra ?
Answer : Prior to Cassandra 1.2, every node was allocate to a particular token range.
What is the use of Cassandra database ?
Answer : Apache Cassandra is a high-performance provides database to manage large number of data among many commodity...
What is the replica placement strategy in Cassandra ?
Answer : Once you’ve absorbed that the strategy should fit the kind of environment you are placing your cluster in...
What is the relationship between Apache Hadoop, HBase, Hive and Cassandra ?
Answer : It is a Big Data framework which uses Hadoop Distributed File System to Store the data and MapReduce framework to...
What is the most widely used API to write data to Cassandra ?
Answer : Java makes the write procedure locked into the Java program.
What is the internal architecture of the Cassandra database ?
Answer : Cassandra is build to manage big data workloads among multiple nodes with no single point of failure
