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What is JIT compiler?
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What do you understand by Java virtual machine?
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List the features of Java Programming language.
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What is Java?
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Why does Java not support pointers?
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What are the advantages of Packages in Java?
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Is Empty .java file name a valid source file name?
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How to calculate total number of vowels in String?
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How to Convert Signed Integer to String?
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How to remove specific characters in the String?
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Write a Java Program to demonstrate Scroll up/ Scroll down.
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Write a Java Program to demonstrate an explicit wait condition check.
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Write a Java Program for the Fibonacci series.
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Write a Java Program to iterate ArrayList using for-loop, while-loop, and advance for-loop.
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Write a Java Program to iterate HashMap using While and advance for loop
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Write a Java Program to find whether a number is prime or not.
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Write a Java Program to find whether a string or number is palindrome or not.
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differences between object-oriented programming and structural programming?
Object-oriented Programming
Follows a bottom-up approach.It provides data hiding.
It is used to solve complex problems.
It allows reusability of code that reduces redundancy of code.
It is based on objects rather than functions and procedures .
It provides more security as it has a data hiding feature.
It focuses on data .
More abstraction more flexibility.
Structural Programming
Follows a top-down approach.
. Data hiding is not allowed.
It is used to solve moderate problems.
Reusability of code is not allowed.
. It provides a logical structure to a program in which the program is divided into functions.
It provides less security as it does not support the data hiding feature.
More abstraction more flexibility.
Less abstraction less flexibility.
It focuses on the process or logical structure.
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Java
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Java used for?
• It is used for developing Android Apps
• Helps you to create Enterprise Software
• Wide range of Mobile java Applications
• Scientific Computing Applications
• Use for Big Data Analytics
• Java Programming of Hardware devices
• Used for Server-Side Technologies like Apache,
JBoss, GlassFish, etc.
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What is java;
Java is a general-purpose, class-based, object-oriented programming language designed for having lesser implementation dependencies. It is a computing platform for application development. Java is fast, secure, and reliable, therefore. It is widely used for developing Java applications in laptops, data centers, game consoles, scientific supercomputers, cell phones, etc.
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what is difference between abstract class and interface
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Which of the following creates a List of 3 visible items and multiple selections abled?

a) new List(false, 3)
b) new List(3, true)
c) new List(true, 3)
d) new List(3, false)

Answer : b
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Which of the following tool is used to generate API documentation in HTML format from doc comments in source code?

a) javap tool
b) javaw command
c) Javadoc tool
d) javah command

Answer : c
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What does the expression float a = 35 / 0 return?

a) 0
b) Not a Number
c) Infinity
d) Run time exception

Answer : c
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Which of the following is a valid long literal?

a) ABH8097
b) L990023
c) 904423
d) 0xnf029L

Answer : d
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What is the return type of the hashCode() method in the Object class?

a) Object
b) int
c) long
d) void

Answer : b
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Which of the following is a valid declaration of a char?

a) char ch = '\utea';
b) char ca = 'tea';
c) char cr = \u0223;
d) char cc = '\itea';

Answer : a
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_____ is used to find and fix bugs in the Java programs.

a) JVM
b) JRE
c) JDK
d) JDB

Answer : d
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The \u0021 article referred to as a

a) Unicode escape sequence
b) Octal escape
c) Hexadecimal
d) Line feed

Answer : a
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Which of the following is not a Java features?

a) Dynamic
b) Architecture Neutral
c) Use of pointers
d) Object-oriented

Answer : c
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