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tgk streamline solutions


{ City } chennai
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Answers / { tgk streamline solutions }

Question { 1443 }

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.

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Question { 1088 }

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.

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Question { 1281 }

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[]

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Question { 1576 }

How does python handle memory management?


Answer

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

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Question { 1971 }

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

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Question { 1801 }

What is the general format of unix command syntax?


Answer

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

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Question { 1670 }

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.

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Question { 1449 }

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′

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Question { 1648 }

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

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Question { 883 }

Define a single-user system.


Answer

A personal computer which possesses an operating system designed to operate by only one user at a given time is known as a single-user system. Single user system becomes more popular since low-cost hardware and availability of a wide range of software to perform different tasks.

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Question { 984 }

List a few significant features of unix?


Answer

The following are a few features of UNIX;
• Machine independent
• Portability
• Multi-user operations
• Unix Shells
• Hierarchical file system
• Pipes and filters
• Background processors
• Utilities
• Development tools

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Question { 1339 }

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.

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Question { 1435 }

Differentiate between absolute and related path?


Answer

Absolute path refers to the exact path as defined from the root directory whereas, related path refers to the path related to the current locations.

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Question { 1394 }

How will you capitalize the first letter of string?


Answer

Python's capitalize() method capitalizes the first letter of a string. It gives back the original text if the string starts with a capital letter already.

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Question { 1175 }

What is __init__?


Answer

In Python, _init_ is a constructor or function. When a new object is formed, memory is allocated using this technique.

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