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Arrays Questions

Home > Technical Aptitude > Data Structures > Arrays > General Questions
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The memory address of the first element of an array is called


Abase address

Bfloor address

Cfoundation address

Dfirst address

Answer: Option A

Explanation:

Here is no explanation for this answer

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The smallest element of an array's index is called


ALower bound

BUpper bound

CRange

DExtraction

Answer: Option A

Explanation:

Here is no explanation for this answer

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Fibonacci sequence is the sequence of integers


A1,3,5,7,9,11,13

B0, 1, 1,2,3,5,8, 13,21,54 ....

C0, 1, 3, 4, 7, 11, 18, 29, 47 ...

D0, 1, 3, 7, 15 ...

Answer: Option B

Explanation:

Last element of the correct option (B) should be 34 instead of 54.

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You wish to store a small amount of data and make it available for rapid access. You do not have a need for the data to be sorted, uniqueness is not an issue and the data will remain fairly static Which data structure might be most suitable for this requirement?


ATreeSet

BHashMap

CLinkedList

Dan array

Answer: Option D

Explanation:

Here is no explanation for this answer

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Dynamic arrays overcome the limit of static arrays.


ATRUE

BFALSE

Answer: Option A

Explanation:

Static arrays have fixed capacity. The capacity must be specified during memory allocation. Dynamic arrays don’t require to specify their capacity during memory allocation. Dynamic arrays have fixed physical size at backend and its capacity increases if required. Thus, Dynamic arrays overcome the limit of static arrays.

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Both Dynamic array and Dynamically memory allocated array are same.


ATRUE

BFALSE

Answer: Option B

Explanation:

Physical size of a Dynamic array is fixed with a larger value. Dynamically memory allocated arrays are arrays whose memory is allocated at run time rather than at compile time. Dynamically memory allocated arrays don’t have physical size at the backend. Thus, Dynamic arrays and Dynamically memory allocated arrays are different.

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Array is divided into two parts in ____________


ASparse Array

BHashed Array Tree

CGeometric Array

DBounded-size dynamic array

Answer: Option D

Explanation:

The first part stores the items of the dynamic array and the second part is reserved for new allocations.

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Which of the following is a disadvantage of dynamic arrays?


AMemory leak

BLocality of reference

CData cache utilization

DRandom access

Answer: Option A

Explanation:

Dynamic arrays share the advantage of arrays, added to it is the dynamic addition of elements to the array. Memory can be leaked if it is not handled properly during allocation and deallocation. It is a disadvantage.

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What is the time complexity for inserting/deleting at the beginning of the array?


AO(nlogn)

BO(1)

CO(n)

DO(logn)

Answer: Option C

Explanation:

All the other elements will have to be moved, hence O(n).

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The growth factor of ArrayList in Java is _______


A1

B1.5

C2

Answer: Option B

Explanation:

The growth factor of dynamic arrays (Array List) in Java is 3/2.
The new array capacity is calculated as new_array_size = (old_array_size*3)/2+1.

Workspace

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