Analyst Questions


Q:

Difference between Arraylist and Linked list?

Answer

ArrayList and LinkedList both implements List interface and maintains insertion order. Both are non synchronized classes.


 


But there are many differences between ArrayList and LinkedList classes that are given below.


 

ArrayList    V/s     LinkedList ::


 

1) ArrayList internally uses dynamic array to store the elements.


                   Whereas


LinkedList internally uses doubly linked list to store the elements.


 

2) Manipulation with ArrayList is slow because it internally uses array. If any element is removed from the array, all the bits are shifted in memory.


                   Whereas


Manipulation with LinkedList is faster than ArrayList because it uses doubly linked list so no bit shifting is required in memory.


 

3) ArrayList class can act as a list only because it implements List only.


                   Whereas


LinkedList class can act as a list and queue both because it implements List and Deque interfaces.


 

4) ArrayList is better for storing and accessing data.


                   Whereas


LinkedList is better for manipulating data.

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Q:

A genus can best be defined as

A) a taxon composed of one or more species and a classification level lying below family B) a taxon composed of families
C) the most specific taxon D) a taxon comprised of classes
 
Answer & Explanation Answer: A) a taxon composed of one or more species and a classification level lying below family

Explanation:

A genus can best be defined as a taxon composed of one or more species and a classification level lying below family.

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Filed Under: Biology
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Q:

Which statement correctly describes the role of chance in evolution?

A) An allele that increases evolutionary fitness cannot be lost from a population by chance events. B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
C) Evolutionary change proceeds by an accumulation of changes that occur by chance. D) None of the above
 
Answer & Explanation Answer: B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA

Explanation:
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Filed Under: Biology
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Q:

Which of the following team has won the 37th and final edition of the Hockey Champions Trophy at Breda, the Netherlands?

A) India B) Australia
C) Brazil D) The Netherlands
 
Answer & Explanation Answer: B) Australia

Explanation:

In the summit clash of the 37th and final edition of the Hockey Champions Trophy at Breda, the Netherlands, India lost to defending champions Australia via penalty shoot-off. The match went into the shoot-off after both the teams were locked at 1-1 in regulation time.

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Filed Under: Sports
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Q:

Callous is the opposite of

A) emotionally hardened B) insensitive
C) sympathetic D) Unkind
 
Answer & Explanation Answer: C) sympathetic

Explanation:

A callous person is insensitive or emotionally hardened.

 

Hence, Callous is the opposite of Sympathetic, kind hearted, sensitive, nice,...

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Filed Under: Alphabet Test
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Q:

The sources of state power are specifically outlined in

A) The Tenth Amendment B) The supremacy clause
C) Article l D) All of the above
 
Answer & Explanation Answer: A) The Tenth Amendment

Explanation:

The sources of state power are specifically outlined in the Tenth Amendment of the Bill of Rights.
When the Constitution was first proposed, many people were concerned about the federal government become too powerful. A group known as the anti-federalists pushed for a way to legally set aside certain rights and powers to individual states.

This amendment was added to satisfy the anti-federalists who were concerned that the Constitution would grant the federal government unlimited power.

 

The Tenth Amendment states that all powers that are not specifically given to the federal government are reserved to individual states.

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Filed Under: Indian Politics
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Q:

Backup means

A) Protecting data by copying it from the original source to a different destination B) Accessing data on tape
C) Filtering old data from the new data D) Adding more components to your network
 
Answer & Explanation Answer: A) Protecting data by copying it from the original source to a different destination

Explanation:

Protecting data by copying it from the original source to a different destination is called as Backup. When an original data is lossed, to restore the information by copying the data from the source to other destination is called as Backup or Data backup.

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Filed Under: Computer
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Q:

Which is a correct way to measure wavelength?

A) Nearest peak to peak B) Nearest peak to nearest trough
C) Nearest trough to peak D) None of the above
 
Answer & Explanation Answer: A) Nearest peak to peak

Explanation:

Wavelength of a wave can be measured with the distance between two nearest crest and crest or nearest troughs. It is measured as armstrong units.

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Filed Under: Physics
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