Question { 1276 }

How can constructor chaining be done using this keyword?

Answer

Calling one constructor from another constructor in the same class is what it is. This keyword can be used to accomplish this.

Question { 1614 }

What are the advantages of packages in java?

Answer

The benefits of defining packages in Java are numerous.

Name conflicts are avoided by packages.
The package makes access control simpler.

Additionally, we can have hidden classes that are utilized by the package but are not visible from the outside.
The linked classes are easy to find.

Question { 1274 }

What is method overloading with type promotion?

Answer

The process of declaring several methods with the same name but distinct argument types in the same class is known as "method overloading with type promotion" in Java.

Question { 1322 }

What do you mean by aggregation?

Answer

The term aggregation refers to the relationship between two classes best described as a “whole/part” and “has-a” relationship. This kind is the most specialized version of an association relationship. It contains the reference to another class and is said to have ownership of that class.

Question { 1234 }

What are python iterators?

Answer

An object that lets you go through a collection's items (such lists, tuples, or dictionaries) one at a time is called an iterator in Python. An iterator implements two methods: __next__(), which returns the subsequent item in the sequence and raises StopIteration when the sequence is exhausted, and __iter__(), which returns the iterator object itself.

Question { 1399 }

What are negative indexes and why are they used?

Answer

Negative indexes are those that come from the end of the string, tuple, or list.
The last entry in the array is indicated by Arr[-1]. Arr[]

Question { 1687 }

How does python handle memory management?

Answer

Python uses an automatic garbage collection mechanism, employing reference counting and cyclic garbage collection for memory management.

Question { 1747 }

What are the main concepts of oops in java?

Answer

The following lists the key ideas of Java's OOPs:

Genetic Polymorphism

Encapsulation of Abstraction

Question { 719 }

Is django better than flask?

Answer

Flask is often easier to use for small, simple applications, especially when you want full control over the components of your project. However, it requires additional setup and libraries for larger applications (e.g., ORM, authentication, etc.).
Djangos a full-fledged web framework, providing a lot of features out of the box, such as an ORM, authentication system, form handling, and an admin interface. This makes it a great choice for large-scale applications where you need a more opinionated structure and fewer decisions to make.
Verdict: Flask is great for flexibility and simplicity in small to medium applications, while Django is better for larger applications where speed of development and built-in tools are important.

Question { 2105 }

Describe the usage and functionality of the command rm –r * in unix?

Answer

The command rm –r * erases all files in a directory with its subdirectories.
• rm is for deleting files
• -r is to delete directories and subdirectories with files within
• * is indicate all entries

Question { 1946 }

What is the general format of unix command syntax?

Answer

Generally, UNIX shell commands follow the following pattern
Command (-argument) (-argument) (-argument) (filename)

Question { 1765 }

Which unix command lists files/folders in alphabetical order?

Answer

The ls –l command is used to list down files and folders in alphabetical order, sorted with modified time.

Question { 1544 }

Describe a link in unix.

Answer

Another name for a file is a link. It is used to assign more than just one name for a file and is not valid to assign more than one name to a directory or to link filenames on different computers.
General command ‘– ln filename1 filename2′
A symbolic link is a file that is used to contain only the name of other files included in it. Directed to the files pointed by it is the operation of the symbolic link.
General command ‘– ln -s filename1 filename2′

Question { 1798 }

What are the basic responsibilities of a shell?

Answer

Following are the responsibilities of a shell;
• Program Execution
• Input/ output redirection
• Filename and variable substitution
• Pipeline hookup
• Environment control
• Integrated programming language

Question { 1443 }

Describe the term directory?

Answer

A directory in UNIX is a specialised form of a file that maintains a list of all the files which are included in it.