first draft of the quiz

The quiz first draft could be reshulfed to a smooth logical order, and can be reviewd based on what they mostly need to remember for the project. It can have some more conceptual questions. 

But it is review most of the topics covered in the firsta day and fucntionalities they need to remeber!

Author: bpiereck

exercises/quiz/quiz_day2.md

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+# QUIZ: Nextflow for reproducible and automated data analysis
+
+1. With what operator can you convert a queue channel to a value channel?
+   a. `.view()`
+   b. `.first()`
+   c. `. collect()`
+   d. `.mix()`
+   
+2. On what language is NextFlow based?
+   a. Groovy
+   b. Python
+   c. Java
+   d. R
+   e. Perl
+
+3. What is the correct process input notation for this channel entry?
+
+   `[sample1, /data/sample1.fq.gz]`
+
+   a. val(id), path(fq)
+   b. tuple val(id), path(fq)
+   c. tuple(val(id), path(fq))
+   d. val(input)
+
+4. What is the correct process include syntax?
+   a. include() to 'main.nf'
+   b. include{} from './main.nf'
+   c. ./main.nf to {}
+
+5. With what directive can you differentiate  mutiple executions of the same process?
+
+- Open answer in mentimeter or related
+  
+6.  What is the correct command to download a pipeline?
+  a. nextflow run
+  b. nextflow config
+  c. nextflow pull
+  d. nextflow download
+
+7.  With what operator can you manipulate the channel structure
+  a. `.map()`
+  b. `.view()`
+  c. `.mix()`
+  d. `.manipulate()`
+
+8. How can you acess ythe value from `--reads`?
+
+   `nextflow run main.nf --reads*.fq.gz`
+
+   a. parameters.reads
+   b. reads
+   c. reads_param
+   d. params.reads
+
+9. with what directive can you differentiate multiple executions of the same process
+
+    - open anser (`tag` should be answerd)
+
+10. What nextflow command do you use to execute a file called 'main.nf'?
+
+      - open answer (`nextflow run main.nf` should be the answer)
+12. Which is the better worflow manager?
+  a. Nextflow
+  b. More Nextflow
+  c. How about Nextflow
+  d. Nextflow again
+  e. Definetely Nextflow