Best Coding Keyboard under 2000 rupees in 2023

Here are five of the best keyboards that you can buy on Amazon for around 2000 Rupees:

5: Logitech K120: A wired USB keyboard with a low profile design and a comfortable, quiet typing experience.

check it in amazon here

About this item

• All-day Comfort: The design of this standard keyboard creates a comfortable typing experience thanks to the deep-profile keys and full-size standard layout with F-keys and number pad.
• Easy to Set-up and Use: Set-up couldn't be easier, you simply plug in this corded keyboard via USB on your desktop or laptop and start using right away without any software installation.
• Compatibility: This full-size keyboard is compatible with Windows 7, 8, 10 or later, plus it's a reliable and durable partner for your desk at home, or at work
• Spill-proof: This durable keyboard features a spill-resistant design (1), anti-fade keys and sturdy tilt legs with adjustable height, meaning this keyboard is built to last.
• Upgrade to Logitech K270 Wireless Keyboard: Experience wireless freedom with K270, featuring 2-year battery life, plug-and-play simplicity, and reliable hassle-free wireless connection.

4: Zebronics Zeb-Warrior: A budget gaming keyboard with adjustable backlighting, media controls, and a spill-resistant design.

check it in amazon here

About this item

• Zeb-Magnus USB Gaming Keyboard with 4 Modes multicolor LED Lights
• It has gold plated USB connector and braided cable
• It includes 3 customizable macro keys, 5 programmable keys with rupee key
• Interface : USB
• Power Consumption : DC5V, <350mA
• Keystroke Life : 10 million cycles
• 1 year warranty-from the date of purchase
• Country of Origin: China

3: Lenovo 300 USB Keyboard: A compact wired keyboard with a simple design, quiet keys, and durable construction.

https://amzn.to/409MNId 

About this item

• Lenovo Wired Keyboard and Mouse Combo: Black color
• Keyboard: waterproof exoskeleton, Mouse: full size, an ergonomic masterpiece – all-day comfort at your fingertips.
• A rugged set that not only passed rigorous performance tests, but passed all while still looking sleek and stylish
• Island style keys and quiet key strokes give you a typing experience like no other - and it’s all liquid resistant!
• A high-resolution, 1600 dpi optical sensor ensures you’ll be smoothly gliding from window-to-window
• Country of Origin: China

2: AmazonBasics Wired Keyboard: A wired USB keyboard with a standard layout, media controls, and a plug-and-play design.

https://amzn.to/3Rhkunl

About this item

• Wired keyboard with sturdy design
• Comes with a USB 2.0 cable for a reliable connection
• Robust keys provide a comfortable experience
• Convenient multimedia keys for easy access to common functions
• Compatible and works well with most PC/Mac/Laptop/Smartphone/Tablet.

1: Zebronics Companion 110 Wireless Keyboard and Mouse Set with Bluetooth multiconnect, 2.4GHz Receiver, 2 Months* Backup, 1600DPI, Smartphone/Tablet Holder, Built in Rechargeable Battery

https://amzn.to/3XJxjcg

That's all about the Keyboard budget friendly best keyboards

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Deep, Shallow and Lazy Copy

 We can define Cloning as “create a copy of object”. Shallow, deep and lazy copy is related to cloning process. 

Shallow Copy 

•  Whenever we use default implementation of clone method we get shallow copy of object means it creates new instance and copies all the field of object to that new instance and returns it as object type, we need to explicitly cast it back to our original object. This is shallow copy of the object.
• clone() method of the object class support shallow copy of the object. If the object contains primitive as well as non primitive or reference type variable in shallow copy, the cloned object also refers to the same object to which the original object refers as only the object references gets copied and not the referred objects themselves.
• That’s why the name shallow copy or shallow cloning in Java. If only primitive type fields or Immutable objects are there then there is no difference between shallow and deep copy in Java.

This can lead to unpleasant side effects if the elements of values are changed via some other reference.

Deep Copy 
 

• Whenever we need own copy not to use default implementation we call it as deep copy, whenever we need deep copy of the object we need to implement according to our need.
• So for deep copy we need to ensure all the member class also implement the Cloneable interface and override the clone() method of the object class.
• A deep copy means actually creating a new array and copying over the values.

Changes to the array vals will not result in changes to the array data.

when to use what 

There is no hard and fast rule defined for selecting between shallow copy and deep copy but normally we should keep in mind that if an object has only primitive fields, then obviously we should go for shallow copy, but if the object has references to other objects, then based on the requirement, shallow copy or deep copy should be done. If the references are not updated then there is no point to initiate a deep copy.

Lazy Copy 

A lazy copy can be defined as a combination of both shallow copy and deep copy. The mechanism follows a simple approach – at the initial state, shallow copy approach is used. A counter is also used to keep a track on how many objects share the data. When the program wants to modify the original object, it checks whether the object is shared or not. If the object is shared, then the deep copy mechanism is initiated.

Summary 

In shallow copy, only fields of primitive data type are copied while the objects references are not copied. Deep copy involves the copy of primitive data type as well as object references. There is no hard and fast rule as to when to do shallow copy and when to do a deep copy. Lazy copy is a combination of both of these approaches