Ibm company ( REFERAL DRIVE FOR 2016, 2017 BATCH )

Ibm company ( REFERAL DRIVE FOR 2016, 2017 BATCH )
Associate System Engineer

JOB ID

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TAKE THESE JOB ID ASK FOR REFERAL WITH IBM EMPLOYEE
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147959BR
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only 65 through out

2016, 2017

drive date 20-5-2018

Reva Institute of Technology and Management

Address: Rukmini Knowledge Park, Yelahanka, Kattigenahalli, Bengaluru, Karnataka 560064

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https://ibmreferrals.reppify.com/ibmreppify/jobs/133360?bpin=1046&com=5&rin=2062293
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Academic Criteria :

65 percent or above in B.Tech , Class X and XII.
No backlogs at the time of interview
Written Round :
The Written round consists of two parts namely Number Series and General Aptitude Test and English Assessment Test. For Number Series and General Aptitude Test, there is a timer of 2.15 min. And for the English Assessment Test, total time duration is 20 minutes. There is no timer for each question as in the 1st round. Both are objective tests.
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Time and Distance
Time and Work
Compound Interest
Partnership
Problems on Ages
Clock
Area
Permutation and Combination
Problems on Numbers
Decimal Fraction
Square Root and Cube Root
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The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:

A. 15360
B. 153600
C. 30720
D. 307200
2.
An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:

A. 2%
B. 2.02%
C. 4%
D. 4.04%
3.
The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?

A. 16 cm
B. 18 cm
C. 24 cm
D. Data inadequate
E. None of these
4.
The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:

A. 40%
B. 42%
C. 44%
D. 46%
5.
A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road?

A. 2.91 m
B. 3 m
C. 5.82 m
D. None of these
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Look at this series: 2, 1, (1/2), (1/4), … What number should come next?

A. (1/3)
B. (1/8)
C. (2/8)
D. (1/16)
2.
Look at this series: 7, 10, 8, 11, 9, 12, … What number should come next?

A. 7
B. 10
C. 12
D. 13
3.
Look at this series: 36, 34, 30, 28, 24, … What number should come next?

A. 20
B. 22
C. 23
D. 26
4.
Look at this series: 22, 21, 23, 22, 24, 23, … What number should come next?

A. 22
B. 24
C. 25
D. 26
5.
Look at this series: 53, 53, 40, 40, 27, 27, … What number should come next?

A. 12
B. 14
C. 27
D. 53

Look at this series: 21, 9, 21, 11, 21, 13, 21, … What number should come next?

A. 14
B. 15
C. 21
D. 23
View Answer Discuss in Forum Workspace Report
7.
Look at this series: 58, 52, 46, 40, 34, … What number should come next?

A. 26
B. 28
C. 30
D. 32
View Answer Discuss in Forum Workspace Report
8.
Look at this series: 3, 4, 7, 8, 11, 12, … What number should come next?

A. 7
B. 10
C. 14
D. 15
View Answer Discuss in Forum Workspace Report
9.
Look at this series: 8, 22, 8, 28, 8, … What number should come next?

A. 9
B. 29
C. 32
D. 34
View Answer Discuss in Forum Workspace Report
10.
Look at this series: 31, 29, 24, 22, 17, … What number should come next?

A. 15
B. 14
C. 13
D. 12

The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:

A. 15360
B. 153600
C. 30720
D. 307200
View Answer Discuss in Forum Workspace Report
2.
An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:

A. 2%
B. 2.02%
C. 4%
D. 4.04%
View Answer Discuss in Forum Workspace Report
3.
The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?

A. 16 cm
B. 18 cm
C. 24 cm
D. Data inadequate
E. None of these
View Answer Discuss in Forum Workspace Report
4.
The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:

A. 40%
B. 42%
C. 44%
D. 46%
View Answer Discuss in Forum Workspace Report
5.
A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road?

A. 2.91 m
B. 3 m
C. 5.82 m
D. None of these
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English Assessment Test.
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Prepare a multiple-paragraph writing sample of about 300–600 words on the topic
below. You will have 50 minutes to complete this sample. You should use the time
available to plan, write, review, and edit what you have written. Read the assignment
carefully before you begin to write.
Some schools require each student to participate in an organized school sport chosen
by the student. People at these schools argue that athletics is an important part of the
educational experience and that there should be a rule requiring participation. Others
argue that students should be free to decide whether or not they wish to participate in
organized school sports. Write an essay for a classroom instructor in which you take a
position on whether participation in organized school athletics should be required. Be
sure to defend your position with logical arguments and appropriate examples.
Please refer to the ‘WritePlacer Guide’ for more information on Writeplacer and its
scoring (i.e., click the online link – here).
© 2007 The College Board. All rights reserved. College Board, ACCUPLACER,
WritePlacer, and the acorn logo are registered trademarks of the College Board.
connect to college success is a trademark owned by the College Board. All other
products and services may be trademarks of their respective owners. Visit the College
Board on the Web: www.collegeboard.com.
Test 2 – ACCUPLACER READING COMPREHENSION TEST
The 20 questions in this test are of two main types:
1. Read a Passage: The first type of question consists of a reading passage followed
by a question based on the text. Both short and long passages are provided. The
reading passages can also be classified according to the kind of information processing
required, including explicit statements related to the main idea, explicit statements
related to a secondary idea, application, and inference.
2. Sentence relationships: The second type of question, sentence relationships,
presents two sentences followed by a question about the relationship between these
two sentences. The question may ask, for example, if the statement in the second
sentence supports that in the first, if it contradicts it, or if it repeats the same information.
READING COMPREHENSION SAMPLE QUESTIONS
Directions for Questions 1 to 6:
Read the statement or passage and then choose the best answer to the question. Answer the question
based on what is stated or implied in the statement or passage.
1. In the words of Thomas DeQuincey, “It is notorious that the memory strengthens as
you lay burdens upon it.” If, like most people, you have trouble recalling the names
of those you have just met, try this: The next time you are introduced, plan to
remember the names. Say to yourself, “I’ll listen carefully; I’ll repeat each person’s
name to be sure I’ve got it, and I will remember.” You’ll discover how effective this
technique is and probably recall those names for the rest of your life.
The main idea of the paragraph maintains that the memory
A. always operates at peak efficiency.
B. breaks down under great strain.
C. improves if it is used often.
D. becomes unreliable if it tires.
2. Unemployment was the overridi
This passage is primarily about
A. unemployment in the 1930s.
B. the effect of unemployment on United States families.
C. President Franklin D. Roosevelt’s presidency.
D. President Roosevelt’s FERA program.
3. It is said that a smile is universally understood. And nothing triggers a smile more
universally than a taste of sugar. Nearly everyone loves sugar. Infant studies
indicate that humans are born with an innate love of sweets. Based on statistics, a
lot of people in Great Britain must be smiling because on average, every man,
woman, and child in that country consumes 95 pounds of sugar each year.
From this passage it seems safe to conclude that the English
A. do not know that too much sugar is unhealthy.
B. eat desserts at every meal.
C. are fonder of sweets than most people.
D. have more cavities than any other people.
4. With varying success, many women around the world today struggle for equal rights.
Historically, women have achieved greater equality with men during periods of social
adversity. The following factors initiated the greatest number of improvements for
women: violent revolution, world war, and the rigors of pioneering in an undeveloped
land. In all three cases, the essential element that improved the status of women was a
shortage of men, which required women to perform many of society’s vital tasks.
We can conclude from the information in this passage that
A. women today are highly successful in winning equal rights.
B. only pioneer women have been considered equal to men.
C. historically, women have only achieved equality through force.
D. historically, the principle of equality alone has not been enough to secure
women equal rights.
5. In 1848, Charles Burton of New York City made the first baby carriage, but people
strongly objected to the vehicles because they said the carriage operators hit too many
pedestrians. Still convinced that he had a good idea, Burton opened a factory in
England. He obtained orders for the baby carriages from Queen Isabella II of Spain,
Queen Victoria of England, and the Pasha of Egypt. The United States had to wait
another 10 years before it got a carriage factory, and only 75 carriages were sold in the
first year.
Even after the success of baby carriages in England,
A. Charles Burton was a poor man.
B. Americans were still reluctant to buy baby carriages.
C. Americans purchased thousands of baby carriages.
D. the United States bought more carriages than any other country.
6. All water molecules form six-sided structures as they freeze and become snow
crystals. The shape of the crystal is determined by temperature, vapor, and wind
conditions in the upper atmosphere. Snow crystals are always symmetrical because
these conditions affect all six sides simultaneously.
The purpose of the passage is to present
A. a personal observation.
B. a solution to a problem.
C. actual information.
D. opposing scientific theories.
7. In the words of Thomas DeQuincey, “It is notorious that the memory strengthens as
you lay burdens upon it.” If, like most people, you have trouble recalling the names of
those you have just met, try this: The next time you are introduced, plan to remember
the names. Say to yourself, “I’ll listen carefully; I’ll repeat each person’s name to be sure
I have it, and I will remember.” You’ll discover how effective this technique is and
probably recall those names for the rest of your life.
The writer believes people remember names best when they
a. meet new people
b. are intelligent
c. decide to do so
d. are interested in people
8. Many people have owned, or have heard of, traditional “piggy banks,” coin banks
shaped like pigs. A logical theory about how this tradition started might be that because
pigs often symbolize greed, the object is to “fatten” one’s piggy bank with as much
money as possible. However, while this idea makes sense, it is not the correct
origin of the term. The genesis of the piggy bank is the old English word “pygg”, which
was a common kind of clay hundreds of years ago in England. People used pots and
jars made out of this red “pygg” clay for many different purposes in their homes.
Sometimes they kept their money in one of the pots, and this was known as a pygg
bank. Over the years, because “pygg” and “pig” sounded the same, glaziers began
making novelty banks out of pottery in the shape of a pig as a kind of joke. These banks
were given as gifts and exported to countries where people spoke other languages and
where no one had ever heard of pygg clay. The tradition caught on all over the world,
and today piggy banks come in all colors and are made of all kinds of materials,
including plastic.
This passage is mainly about
A. how people in different countries save their money
B. how people in England made pottery centuries ago
C. how a common expression began in a surprising way
D. how an unusual custom got started
9. It is said that a smile is universally understood. And nothing triggers a smile more
universally that the taste of sugar. Nearly everyone loves sugar. Infant studies indicate
that humans are born with an innate love of sweets. Based on statistics, a lot of people
in Great Britain must be smiling because on average, every man, woman and child in
that country consumes 95 pounds of sugar each year.
This passage implies that the writer thinks that 95 pounds of sugar per person per year
is
A. a surprisingly large amount
B. a surprisingly small amount
C. about what one would expect
D. an unhealthy amount
10. The wheel has been used by humans since nearly the beginning of civilization and
is considered one of the most important mechanical inventions of all time. Most primitive
technologies since the invention of the wheel have been based on its principles, and
since the industrial revolution, the wheel has been a basic element of nearly every
machine constructed by humankind. No one knows the exact time and place of the
invention of the wheel, but its beginnings can be seen across many ancient civilizations.
According to this passage, the wheel is an important invention because
a. it is one of the world’s oldest inventions
b. it forms the basis of so many later inventions
c. it is an invention that can be traced to many cultures
d. it is one the world’s most famous inventions
11. Samuel Morse, best known today as the inventor of Morse Code and one of the
inventors of the telegraph, was originally a prominent painter. While he was always
interested in technology and studied electrical engineering in college, Morse went to
Paris to learn from famous artists of his day and later painted many pictures that now
hang in museums, including a portrait of former President John Adams. In 1825, Morse
was in Washington, D.C., painting a portrait of the Marquis de Lafayette when a
messenger arrived on horseback to tell him that his wife was gravely ill back at his
home in Connecticut. The message had taken several days to reach him because of the
distance. Morse rushed to his home as fast as he could, but his wife had already
passed away by the time he arrived. Grief-stricken, he gave up painting and devoted the
rest of his life to finding ways to transmit messages over long distances faster.
Morse left the art world and helped to invent the telegraph
A. because he was tired of painting
B. because he wanted to communicate with people far away
C. because of a personal tragedy in his life
D. because he was fascinated by science
12. Leonardo DaVinci is not only one of the most famous artists in history, he was also
a botanist, a writer and an inventor. Even though most of his inventions were not
actually built in his lifetime, many of today’s modern machines can be traced back to
some of his original designs. The parachute, the military tank, the bicycle and even the
airplane were foretold in the imaginative drawings that can still be seen in the fragments
of Leonardo’s notebooks. Over 500 years ago, this man conceived ideas that were far
ahead of his time.
The author of this passage is praising Leonardo DaVinci for his:
A. artistic talent
B. intelligence
C. vision
D. fame
Directions for questions 13–22
For the questions that follow, two underlined sentences are followed by a question or
statement. Read the sentences, then choose the best answer to the question or the
best completion of the statement.
13. The Midwest is experiencing its worst drought in 15 years.
Corn and soybean prices are expected to be very high this year.
What does the second sentence do?
A. It restates the idea found in the first.
B. It states an effect.
C. It gives an example.
D. It analyzes the statement made in the first.
14. Social studies classes focus on the complexity of our social environment.
The subject combines the study of history and the social sciences and promotes
skills in citizenship.
What does the second sentence do?
A. It expands on the first sentence.
B. It makes a contrast.
C. It proposes a solution.
D. It states an effect.
15. Knowledge of another language fosters greater awareness of cultural diversity
among the peoples of the world.
Individuals who have foreign language skills can appreciate more readily other
peoples’ values and ways of life.
How are the two sentences related?
A. They contradict each other.
B. They present problems and solutions.
C. They establish a contrast.
D. They repeat the same idea.
16. Serving on a jury is an important obligation of citizenship.
Many companies allow their employees paid leaves of absence to serve on
juries.
What does the second sentence do?
A. It reinforces what is stated in the first.
B. It explains what is stated in the first.
C. It expands on the first.
D. It draws a conclusion about what is stated in the first.
17. While most people think of dogs as pets, some dogs are bred and trained
specifically for certain types of work.
The bloodhound’s acute sense of smell and willing personality make it ideal for
tracking people missing in the woods.
What does the second sentence do?
A. It makes a contrast.
B. It restates an idea found in the first.
C. It states an effect.
D. It gives an example.
18. Paris, France, is a city that has always been known as a center of artistic and
cultural expression.
In the 1920s, Paris was home to many artists and writers from around the world
who became famous, such as Picasso and Hemingway.
What does the second sentence do?
A. It reinforces the first.
B. It states an effect.
C. It draws a conclusion.
D. It provides a contrast.
19. Studies show that the prevalence of fast-food restaurants corresponds with the
rates of obesity in both children and adults.
Obesity is now on the rise in countries outside the U.S., where fast food
restaurants are becoming more common.
How do the two sentences relate?
A. They express roughly the same idea.
B. They contradict each other.
C. They present problems and solutions.
D. They establish a contrast.
20. Compared with the rest of the country, North Dakota has a thriving economy,
making it a place where more people want to live.
Winters in North Dakota are inhospitable, with average temperatures in January
ranging from 2 degrees Fahrenheit to 17 degrees.
What does the second sentence do?
A. It reinforces the first.
B. It explains what is stated in the first.
C. It contradicts the first.
D. It analyzes a statement made in the first.
21. Some stores are testing a new checkout system that allows shoppers to use their
mobile phones to scan items as they walk through stores and pay at self-service
kiosks, skipping the cashiers’ lines.
The new mobile checkout system is intended to reduce long lines and customer
wait times in stores.
What does the second sentence do?
A. It expands on the first.
B. It states an effect.
C. It contrasts with the first.
D. It gives an example.
22. According to the American Sleep Disorders Association, the average teenager
needs around 9.5 hours of sleep per night, possibly because critical growth
hormones are released during sleep.
The average adult requires between six and eight hours of sleep per night for
optimal health and productivity.
How do the two sentences relate?
A. They establish a contrast.
B. They contradict each other.
C. They reinforce each other.
D. They provide a problem and solution.
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1. Per placement Talk:

Here they described their company’s growth and their achievements. They also described their process of recruitment and package for freshers.

2. Round 1: Online MCQ Test:

It consisted of 3 different sections with the first 2 having a time limit of 2 mins 15 sec on every question and the third one with an overall time of 20 mins.

Section 1: 18 questions on ‘Series of numbers’.
Section 2: 18 questions on ‘Quantitative Aptitude’.
Section 3: 22 questions on ‘ English Communication’.

Note:

*Series questions are directly from IndiaBix site. So practice hard and they will be very easy to you.

*Quantitative questions are very easy and based only on calculations. You should be fast in solving these.

*English Communication questions are basically from Business email, Business letter formats and rules.It also covered topics from Grammar like Change of Speech, Voice Change, Punctuation error, Sentence Correction, etc.

*There is sectional Cut off.

2. Round 2: Verification of Documents and Bio-metric. They verify your original documents and also take your fingerprint.

3. Round 3: Interview. Here they do not focus on technical ability. They mainly focus on communication, speaking power, smartness.

Prepare your CV well.

Note: * Once you clear Round 1, keep all your original documents properly along with you and you are almost selected for the job.

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These are the rounds of the IBM process which I had faced,

1. Aptitude (ipat).
2. English and business related email rules( kenexa).
3. Java coding (45 min on mainly strings).
4. TR + HR ( final round).

Actually, this process done in CMR Institute of Technology, Medchal. On the first day, three rounds were done one after the other and many people attended the drive as it is off campus drive so I thought it’s difficult but I just frankly saying try to put confidently what you have that’s it.

I just did the same thing because I attended the many companies I rejected mainly in first round, and I completed the first round means aptitude, English, coding and in the evening around 4 pm, they announced results luckily I am one of them. I don’t know that if we clear this round we are almost in and I thought there is a group discussion but further round is TR and HR both combined.

On 21st Feb biometric and documents verification uploading on IBM career portal etc…further, TR and HR was done with basic technical questions and HR questions as you can familiar with that simple and easy just be confident with good communication is must. Further, I waited outside as I am the last candidate in my panel.

After that, the result will be said immediately, but I don’t get the result that you got selected but many of them said that you can check on IBM portal I am little confused. But some of them said sorry you were not selected, you can leave for this day live example I experienced after HR and TR this (HR+TR) feedback “will be sent to another panel in that everyone” will be called asked their gov id based on their name they (HR) said one person beside me that you were not selected and you can leave for this day at that moment I was soooooo afraid: 0 and I thought in my mind that boss ready to listen the same thing . He took my id and asked email id and mobile said after 2 min that you can go. I was confused about what I have selected or not.

Many said you can check on IBM portal, next day I received a mail to confirm about our details like name etc. On 24 Feb I received EOI letter from IBM and waiting for offer letter hope it comes early as fast as possible. And IBM hr were so cool and friendly nature. In my interview, I felt that and the process of getting an offer letter is somewhat fast compared to another company because some of my friends who got placed and not placed (who attended the drive) had said so that it’s lucky to be selected and getting offer letter without much delay.

May it help you for your IBM drive.
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Commonly Asked Java Programming Interview Questions | Set 2
Frequently Asked Java Interview Questions | Set 1

Can we Overload or Override static methods in java ?

Overriding : Overriding is related to run-time polymorphism. A subclass (or derived class) provides a specific implementation of a method in superclass (or base class) at runtime.
Overloading: Overloading is related to compile time (or static) polymorphism. This feature allows different methods to have same name, but different signatures, especially number of input parameters and type of input paramaters.
Can we overload static methods? The answer is ‘Yes’. We can have two ore more static methods with same name, but differences in input parameters
Can we Override static methods in java? We can declare static methods with same signature in subclass, but it is not considered overriding as there won’t be any run-time polymorphism. Hence the answer is ‘No’. Static methods cannot be overridden because method overriding only occurs in the context of dynamic (i.e. runtime) lookup of methods. Static methods (by their name) are looked up statically (i.e. at compile-time).
Read more

Why the main method is static in java?
The method is static because otherwise there would be ambiguity: which constructor should be called? Especially if your class looks like this:

public class JavaClass
{
protected JavaClass(int x)
{ }
public void main(String[] args)
{

}
}
Should the JVM call new JavaClass(int)? What should it pass for x? If not, should the JVM instantiate JavaClass without running any constructor method? because that will special-case your entire class – sometimes you have an instance that hasn’t been initialized, and you have to check for it in every method that could be called. There are just too many edge cases and ambiguities for it to make sense for the JVM to have to instantiate a class before the entry point is called. That’s why main is static.

What happens if you remove static modifier from the main method?
Program compiles successfully . But at runtime throws an error “NoSuchMethodError”.

What is the scope of variables in Java in following cases?

Member Variables (Class Level Scope) : The member variables must be declared inside class (outside any function). They can be directly accessed anywhere in class
Local Variables (Method Level Scope) : Variables declared inside a method have method level scope and can’t be accessed outside the method.
Loop Variables (Block Scope) : A variable declared inside pair of brackets “{” and “}” in a method has scope withing the brackets only.
Read more

What is “this” keyword in java?
Within an instance method or a constructor, this is a reference to the current object — the object whose method or constructor is being called. You can refer to any member of the current object from within an instance method or a constructor by using this.
Usage of this keyword

Used to refer current class instance variable.
To invoke current class constructor.
It can be passed as an argument in the method call.
It can be passed as argument in the constructor call.
Used to return the current class instance.
Used to invoke current class method (implicitly)

What is an abstract class? How abstract classes are similar or different in Java from C++?
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.

Like C++, in Java, an instance of an abstract class cannot be created, we can have references of abstract class type though.
Like C++, an abstract class can contain constructors in Java. And a constructor of abstract class is called when an instance of a inherited class is created
In Java, we can have an abstract class without any abstract method. This allows us to create classes that cannot be instantiated, but can only be inherited.
Abstract classes can also have final methods (methods that cannot be overridden). For example, the following program compiles and runs fine.
Read more

Which class is the superclass for every class ?
Object class

Can we overload main() method?
The main method in Java is no extra-terrestrial method. Apart from the fact that main() is just like any other method & can be overloaded in a similar manner, JVM always looks for the method signature to launch the program.

The normal main method acts as an entry point for the JVM to start the execution of program.
We can overload the main method in Java. But the program doesn’t execute the overloaded main method when we run your program, we need to call the overloaded main method from the actual main method only.
Read more

What is object cloning?
Object cloning means to create an exact copy of the original object. If a class needs to support cloning, it must implement java.lang.Cloneable interface and override clone() method from Object class. Syntax of the clone() method is :

protected Object clone() throws CloneNotSupportedException
If the object’s class doesn’t implement Cloneable interface then it throws an exception ‘CloneNotSupportedException’ .

Read more

How is inheritance in C++ different from Java?

In Java, all classes inherit from the Object class directly or indirectly. Therefore, there is always a single inheritance tree of classes in Java, and Object class is root of the tree.
In Java, members of the grandparent class are not directly accessible. See this G-Fact for more details.
The meaning of protected member access specifier is somewhat different in Java. In Java, protected members of a class “A” are accessible in other class “B” of same package, even if B doesn’t inherit from A (they both have to be in the same package).
Java uses extends keyword for inheritance. Unlike C++, Java doesn’t provide an inheritance specifier like public, protected or private. Therefore, we cannot change the protection level of members of base class in Java, if some data member is public or protected in base class then it remains public or protected in derived class. Like C++, private members of base class are not accessible in derived class.
Unlike C++, in Java, we don’t have to remember those rules of inheritance which are combination of base class access specifier and inheritance specifier.
In Java, methods are virtual by default. In C++, we explicitly use virtual keyword. See this G-Fact for more details.
Java uses a separate keyword interface for interfaces, and abstract keyword for abstract classes and abstract functions.
Unlike C++, Java doesn’t support multiple inheritance. A class cannot inherit from more than one class. A class can implement multiple interfaces though.
In C++, default constructor of parent class is automatically called, but if we want to call parametrized constructor of a parent class, we must use Initializer list. Like C++, default constructor of the parent class is automatically called in Java, but if we want to call parameterized constructor then we must use super to call the parent constructor.
See examples here

Why method overloading is not possible by changing the return type in java?
In C++ and Java, functions can not be overloaded if they differ only in the return type . The return type of functions is not a part of the mangled name which is generated by the compiler for uniquely identifying each function. The No of arguments, Type of arguments & Sequence of arguments are the parameters which are used to generate the unique mangled name for each function. It is on the basis of these unique mangled names that compiler can understand which function to call even if the names are same(overloading).

Can we override private methods in Java?
No, a private method cannot be overridden since it is not visible from any other class. Read more

What is blank final variable?
A final variable in Java can be assigned a value only once, we can assign a value either in declaration or later.

final int i = 10;
i = 30; // Error because i is final.
A blank final variable in Java is a final variable that is not initialized during declaration. Below is a simple example of blank final.

// A simple blank final example
final int i;
i = 30;
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What is “super” keyword in java?
The super keyword in java is a reference variable that is used to refer parent class objects. The keyword “super” came into the picture with the concept of Inheritance. Whenever you create the instance of subclass, an instance of parent class is created implicitly i.e. referred by super reference variable.
Various scenarios of using java super Keyword:

super is used to refer immediate parent instance variable
super is used to call parent class method
super() is used to call immediate parent constructor
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What is static variable in Java?
The static keyword in java is used for memory management mainly. We can apply java static keyword with variables, methods, blocks and nested class. The static keyword belongs to the class than instance of the class.

The static can be:

variable (also known as class variable)
method (also known as class method)
block
nested class

Differences between HashMap and HashTable in Java.
1. HashMap is non synchronized. It is not-thread safe and can’t be shared between many threads without proper synchronization code whereas Hashtable is synchronized. It is thread-safe and can be shared with many threads.
2. HashMap allows one null key and multiple null values whereas Hashtable doesn’t allow any null key or value.
3. HashMap is generally preferred over HashTable if thread synchronization is not needed
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How are Java objects stored in memory?
In Java, all objects are dynamically allocated on Heap. This is different from C++ where objects can be allocated memory either on Stack or on Heap. In C++, when we allocate abject using new(), the object is allocated on Heap, otherwise on Stack if not global or static.
In Java, when we only declare a variable of a class type, only a reference is created (memory is not allocated for the object). To allocate memory to an object, we must use new(). So the object is always allocated memory on heap.
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