Which of the following are not local variables?
a) Variables declared in a method
b) Variables declared in a block inside a method
c) Non-static variables declared in a class
d) Variables as method arguments
e) Static variables declared in a class
Created by Nancy K.A.N.
@21:29 30-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which of the following keywords are not related to Java exceptions?
a) try
b) throw
c) catch
d) final
e) finally
f) catches
g) throws
Created by Nancy K.A.N.
@22:24 29-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which of the following are Java unchecked exceptions?
a) InterruptedException
b) ArithmeticException
c) NullPointerException
d) SQLException
e) ClassNotFoundException
Created by Nancy K.A.N.
@22:14 28-Jun-2025
https://kannancy.blogspot.com/
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
In which area of memory is the object reference stored?
a) Method area
b) memory registers
c) Stack area
d) Heap area
Created by Nancy K.A.N.
@23:15 27-Jun-2025
https://kannancy.blogspot.com/
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which interface will you implement to incorporate multithreading in your Java application?
a) Run
b) Runnable
c) Thread
d) Executor
Created by: Nancy K.A.N.
@17:22 26-Jun-2025
https://kannancy.blogspot.com/
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which class will you extend to create a multithreaded application?
a) Threads
b) Runnable
c) Thread
d) Object
Created by Nancy K.A.N.
@15:42 25-Jun-2025
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I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which interface in Java is a super interface of all interfaces?
a) Collections
b) Collection
c) Thread
d) None
Created by: Nancy K.A.N.
@18:42 24-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which UML diagram is used to represent object interaction over time?
a) Class diagram
b) Activity diagram
c) Sequence diagram
d) Activity diagram
Created by Nancy K.A.N.
@17:17 23-Jun-2025
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I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
UML is an acronym for __________________________ used in Object Oriented Programming to represent the design and structure of software systems.
a) Unified Machine Language
b) Universal Machine Language
c) Universal Modeling Language
d) Unified Modeling Language
Created by: Nancy K.A.N.
@14:59 22-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Aggregation is a ____________ relationship with the contained class.
a) has-a
b) is-a
c) part-of
d) independent of
Created by Nancy K.A.N.
@14:58 21-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which of the following Java collections classes does not allow duplicate elements in the collection?
a) ArrayList
b) Vector
c) LinkedList
d) TreeSet
Created by Nancy K.A.N.
@12:05 19-Jun-2025
Watch Tech videos on my YouTube channel https://www.youtube.com/@CodingWithNancy
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Java introduced NIO in version 1.4. Java NIO is used for ____________________.
a) File directory services
b) for character-based IO stream
c) IO non-blocking operations
d) for only byte-based IO
Created by Nancy K.A.N.
@13:49 18-Jun-2025
Watch Tech videos on my YouTube channel https://www.youtube.com/@CodingWithNancy
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which keyword will you use to inherit a class from another class?
a) implements
b) extend
c) extends
d) aggregates
Created by Nancy K.A.N.
@12:25 17-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which keyword is used when an interface needs to inherit from another interface?
a) super
b) implements
c) extend
d) extends
Created by Nancy K.A.N.
@17:40 16-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which of the Following is a Java checked exception?
a) ArithmeticException
b) ArrayIndexOutOfBoundsException
c) FileNotFoundException
d) ClassCastException
Created by Nancy K.A.N.
@12:23 15-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Java annotations are a form of metadata that provides additional or supplemental data to a Java source file. An annotation provides information to the Java compiler and JVM.
An annotation starts with the @ symbol and does not change the action of a program. Annotations can be applied to classes, constructors, methods, instance variables, and so on.
A program can use predefined annotations like @deprecated, or a programmer can create their own annotations depending on the requirement.
@interface TestAnnotation {
String myStr();
}
In which version of Java were annotations introduced?
a) Java 11
b) Java 17
c) Java 8
d) Java 5
e) Java 6
Created by Nancy K A N
@14:47 14-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Regex or Regular Expressions are a part of the Java API. You can use the regex API to search, extract, or search and replace text strings. The regex API is available in java.util.regex package. Java uses the Pattern and Matcher classes to process regular expressions.
Here is a simple example of a Regular expression. The code searches for a pattern and prints the matching string.
/**
*
* @author Nancy K.A.N.
*/
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class SimpleRegexTest {
public static void main(String[] args) {
String str1 = "This is an example of Java Regular Exressions";
Pattern pattern = Pattern.compile("Java");
Matcher matcher = pattern.matcher(str1);
if (matcher.find())
{
System.out.println(matcher.group());
}
}
}
Compile and run the code and comment the output.
Created by Nancy KAN
@13:50 13-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which of the following is the root interface of Java collections?
a) Collections
b) Collection
c) Abstract Collection
d) Concurrent Collection
Created by Nancy N.
@12:38 11-Jun-2026
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
In which Java package are the Socket and ServerSocket classes available?
a) java.lang.network
b) java.util.net
c) java.net
d) java.net.socket
Created by Nancy N.
@13:01 10-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
What will be the output of the following PushbackInputStream code:
You have a text file Test1.txt. The test1.txt contains the following text:
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
To Store object data into a file, you can serialize a class by implementing the Serializable interface. If you do not want to store a particular field in the file, which of the following modifiers will prohibit it?
a) private
b) protected
c) volatile
d) final
e) static
Created by Nancy N.
@14:06 06-06-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which of the following is/are true for Bitwise XOR?
a) Bitwise XOR is associative
b) Bitwise XOR can be used only with double and float data types
c) Bitwise XOR is represented by ~
d) Bitwise XOR can be used only with byte, short, int, and long
Created by Nancy N.
@14:58 05-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Which of the following classes can unread bytes?
a) SequentialPushbackInputStream
b) PushbackReader
c) PushbackInputStream
d) PipedInputStream
Created by Nancy N.
@13:12 04-06-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
The Java enhanced for loop can be used to iterate through an array or a collection, without specifying the size or the number of elements in the array or collection. For example:
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Inheritance is great for code reuse. To restrict the overuse or misuse of inheritance, sealed classes and interfaces were introduced.
In which version of Java were sealed classes introduced first as a preview?
a) Java version 9
b) Java version 11
c) Java version 15
d) Java version 17
Created by Nancy N.
@14:02 02-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
Java Lambda expression is a short piece of code that takes parameters and returns a value like a function. A lambda is an anonymous function. Lambdas are implemented in the code.
Java introduced lambda expressions to bring the concept of functional programming.
A simple Lambda code to add two numbers and return the sum will look like this:
(x+y) -> x+y
Which version of Java implemented Lambdas?
a) version 7
b) version 8
c) version 9
d) version 11
Created by Nancy N
@10:57 01-Jun-2025
I am Nancy. I worked in the IT sector for many years in different roles and so was in life. I created Digital technical content for many years later in my career. I have created YouTube channels for Cooking Recipes, Programming, and Nature.
I recently published a Couring books for Adults.
