Give me right answer please

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Give me right answer please.
A lazy list (aka stream) is like a list except
that it is constructed using the lazy version
of cons: scala> val s1 = 1 #:: 2 #:: 3 #::
LazyList.Empty s1:
scala.collection.immutable.LazyList[Int]
LazyList(1, ?) scala> s1.head res0: Int = 1
scala> s1.tail.head res1: Int = 2
Create the following lazy lists:
An infinitely long stream of 1's
The stream of all non-negative integers
The stream of all non-negative even
integers
The stream of all squares of integers
Transcribed Image Text:A lazy list (aka stream) is like a list except that it is constructed using the lazy version of cons: scala> val s1 = 1 #:: 2 #:: 3 #:: LazyList.Empty s1: scala.collection.immutable.LazyList[Int] LazyList(1, ?) scala> s1.head res0: Int = 1 scala> s1.tail.head res1: Int = 2 Create the following lazy lists: An infinitely long stream of 1's The stream of all non-negative integers The stream of all non-negative even integers The stream of all squares of integers
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