Q$1.$ Consider the following streams of events which are captured respectively as table and stream

in ksqlDB$.[1+2+2+3=8]$

Customer Stream

Order Stream

Time Key Value

$1$ O$1\{$C$1,50\}$

$1$ O$3\{$C$2,20\}$

$1$ O$3\{$C$2,30\}$

$2$ O$1\{$C$1,40\}$

$3$ O$3\{$C$2,10\}$

$3$ O$2\{$C$3,25\}$

a$)$ What are the events present in the Order data stream at the end of time unit $3?$

b$)$ What are the events present in the Customer Table at the end of time unit $3?$

c$)$ What will be the result of left outer join of Customer stream with Order stream at end of time

unit $1?$

Time Key Value

$1$ C$1\{$cust$1,$ A$1\}$

$1$ C$2\{$cust$2,$ A$2\}$

$1$ C$3\{$cust$3,$ A$3\}$

$2$ C$4\{$cust$4,$ A$4\}$

$2$ C$1\{$cust$1,$ AX$\}$

$3$ C$1\{$cust$1,$ AY$\}$

$3$ C$3\{$cust$1,$ AZ$\}$