Hexaware Company Programming Functions

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

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Hexaware Other Question

The perimeter of a rectangle whose length is 6m more than its breadth is 84m. What would be the area of a triangle whose base is equal to the diagonal of the rectangle and whose height is equal to the length of the rectangle? (in m²)
A)324 B)372 C)360 D)364 E)348
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