Hexaware Company Programming Output

Which of the following is true for B+ trees:
A) B+ trees are for storing data on disk B)On B+ trees range queries are faster C)B+ trees are for secondary indexes D)B+ trees are for primary indexes

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B)On B+ trees range queries are faster
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the option is B.
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Hexaware Other Question

Which of the following in the data structure in which insertion can place from any direction but deletion can only takes place from opposite direction:
A)Stack B)Array C)Queue D)Tree Which of the following is correct form of type-casting in C++?
A)per=total/(float)m B)per=(float) total/m C)per=total/float(m) D)per=float(total/m)