# Data Structure Questions and Answers-Parallel Array

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 Question 1
What are parallel arrays?
 A Arrays of the same size B Arrays allocated one after the other C Arrays of the same number of elements D Arrays allocated dynamically
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Question 1 Explanation:
Different arrays can be of different data types but should contain same number of elements. Elements at corresponding index belong to a record.

 Question 2
Which of the following can be called a parallel array implementation?
 A  firstName = ['Joe', 'Bob', 'Frank', 'Hans'] lastName = ['Smith', 'Seger', 'Sinatra', 'Schultze'] heightInCM = [169, 158, 201, 199] for i in xrange firstName = ['Joe', 'Bob', 'Frank', 'Hans'] lastName = ['Smith', 'Seger'] heightInCM = [169, 158] for i in xrange(len(firstName)): print  C  firstName = ['Joe', 'Bob'] lastName = ['Smith', 'Seger', 'Sinatra', 'Schultze'] heightInCM = [169, 158] for i in xrange(len(firstName)): D None of the mentioned

Question 2 Explanation:
All the arrays must have equal length, that is, contain same number of elements.

 Question 3
What are the advantages of parallel arrays over the traditional arrays?
 A When a language does not support records, parallel arrays can be used B Increased locality of reference C Ideal cache behavior D All of the mentioned
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Question 3 Explanation:
In a record, if a field contains only 1 bit, extra space is needed to pad the bits, instead you can use parallel arrays to save space. Sequential access improves locality of reference and cache behavior.

 Question 4
What are some of the disadvantages of parallel arrays?
 A Poor locality of reference for non-sequential access B Very little direct language support C Expensive to shrink or grow D All of the mentioned
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Question 4 Explanation:
They share the drawbacks of arrays.

 Question 5
What is a sorted array?
 A Arrays sorted in numerical order B Arrays sorted in alphabetical order C Elements of the array are placed at equally spaced addresses in the memory D All of the mentioned
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Question 5 Explanation:
The array can be sorted in any way, numerical, alphabetical or any other way but the elements are placed at equally spaced addresses.

There are 5 questions to complete.