java test for beginners

 

In this blog we will give some questions in java for beginners

what is programming ?
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what is program ?
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what is machine language ?
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what is assembly language ?
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what is assembler ?
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what is variable ?
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what is the compiler ?
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define package , class and method ?
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how can we define the programming language as high level programming language ?
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mention all error types in java and explain each one ?
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mention data types in java and group them ?
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explain why can’t store number greater than 127 in integer variable ?
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explain variable scope ?
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explain type casting with 3 examples ?
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explain OOP ?
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what is the scanner , and what it use for ?
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Is java sensitive case ?
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What is JVM?
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mention 5 words of java’s keywords ?
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what does Object-Oriented Programming means ?
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what are the bellow principles stand for ?
JVM ___________________________________________________________________________
JDK ____________________________________________________________________________
JRE ____________________________________________________________________________
JavaC __________________________________________________________________________
OOP ___________________________________________________________________________
JIN ____________________________________________________________________________
SDK ___________________________________________________________________________

Choose the right answer :

What do you mean by JRE?
   a. java runtime environment
   b. java runtime exception
   c. java runtime execution
   d. none of these

Java is a _____________language.
   a. object oriented 
   b. procedural oriented
   c. system oriented
   d. platform oriented

Previously Java was known as ________.
   a. Java onlyb. apple
   c. jdk
   d. oak

What is the extension of the Java program?
   a. .java
   b. .class
   c. .doc
   d. .txt

Which of the following operation(s) is/are required to convert the java source code into output form
   a. Compilation
   b. interpretation
   c. both a and b
   d. none of these

Is java 100% object oriented language?
   a. yes
   b. no
   c. can’t say

Java _________the program first and then __________it.
   1) compile
   2) interpret
   3) assemble
   4) debug
  
   a. 1 and 2
   b. 2 and 1
   c. 3 and 4
   d. 1 and 4

Java is developed by___________
   a. Microsoft
   b. Oracle
   c. Sun
   d. Google

What is JDK?
   a. java development kit
   b. java deployment kit
   c. java demo kit
   d. java distributed kit

In order to run Java program, we need to install __________application program.
   a. jdk
   b. sdk
   c. dbk
   d. all of the above

what is the correct syntax of rmain method in java ?
   a. public void main(String[] gars)
   b. public static void main(string []agrs)
   c. public static void main(String [] args)
   d. public static void Main(String []args)

what is an assignment statement ?
   a. adding a number to an integer
   b. assigning a multiplication
   c. assigning a name to a variable
   d. assigning a value to a variable

which of the flowing is not java keyword ?
   a. static
   b. try
   c. Integer
   d. new

choose the best data type to store this value 5.69
   a. int
   b. double
   c. boolean
   d. String

choose the appropriate data type for this field : isSwimmer
   a. double
   b. boolean
   c. string
   b. int

if you want your condition to depend upon two conditions Both begin true , What is the proper notation to put between the two Boolean statements
   a. =
   b. !=
   c. ||
   d. &&
   e. &

An object can be
   a. class
   b. anything
   c. program
   d. method 


                                              

kanban view in odoo

In this blog we will give and example to design kanban view in odoo
so the code can be just as bellow

<!-- """Create Kanban View""" -->

  <record id="view_ssc_projects_kanban" model="ir.ui.view">
    <field name="name">ssc.projects.kanban</field>
    <field name="model">ssc.projects</field>
    <field name="arch" type="xml">
      <kanban class="o_hr_employee_kanban">
        <field name="id"/>
        <templates>
          <t t-name="kanban-box">
            <div class="oe_kanban_global_click">

              <div class="o_kanban_image">
                <img t-att-src="kanban_image('ssc.projects','image',record.id.raw_value)" alt="Image"/>
              </div>

              <div class="oe_kanban_details">
                <h2>
                  <a type="open">
                    <field name="name" />
                  </a>
                </h2>
                <h4>
                  <a type="open" style="color:#04025e ! important;">
                   <field name="customer_id"/>
                 </a>
               </h4>
             </div>

           </div>
         </t>
       </templates>
     </kanban>
   </field>
 </record>

and the kanban view can look like bellow 

 

 

rounding in odoo

 In this blog we will explain how we can make rounding in odoo for float numbers
         

          as we know 10/3 = 3.333333333333X , and we can make rounding for this value as 3.34 or 3.334 or 3.33 or 3.3 or 3.333 , that is means we have more than one way to make rounding in math , so how can we make rounding in odoo ?

To make rounding in odoo we can use round() function id takes 2 arguments the first one it the float number that we want to round it  ,and the second one is the number of rounding index so the Rule as

num = round(float_number,index_number)

so if we want to round 10/3 for 2 index with will be 3.34 we can do it as bellow

num = round(10/3,2)

Another way to make rounding in odoo is by using float_round() function with can takes 4 arguments as bellow

num = float_round(10/3,precision_digits=2, precision_rounding=None, precision_method='up' )

less porblem with odoo 10

 

I had some problem with odoo 10 UI after installing some theme module , and I tried many ways to fix it , and only one way worked with me , which by running the command bellow in the terminal

sudo npm install -g less@3.0.4 less-plugin-clean-css

report color from user in odoo

 

In this blog we will explain how read report color from user in odoo . so let us make an example 

First : we have to define char field that will contain the color rbg as bellow

color = fields.Char(string="Color")

Second : create the view for this field as bellow 

<field name="color" widget="colorpicker"/>

or
<field name="color" widget="color"/>

after that the view will look like bellow 

 

Third : we can read our color in the report template as bellow

background-color:<t t-esc="color"/>!important; // to make it as back groud color for some element 

color:<t t-esc="color"/>!important; // to make it as text color

...

Eg : say we want to add it as back ground color for td in a table so we can do it as bellow

&lt;td style="width:100px;font-size:14px; border: 1px solid black;padding-top:2px; padding-bottom:2px;background-color:<t t-esc="color"/>!important; font-size: 14px; text-align:center;font-weight:bold;"
      <span t-esc="field_name"/>

&lt;/td &gt;



I used this with odoo 11 , and it worked :)

One2many field in odoo

 In this blog we will explain how to control the line in one2many fields in odoo

(0, 0,  { values }) link to a new record that needs to be created with the given value
dictionary 

(1, ID, { values }) update the linked record with id = ID (write *values* on it)

(2, ID) remove and delete the linked record with id = ID (calls unlink on ID,

that will delete the object completely, and the link to it as well)

(3, ID) cut the link to the linked record with id = ID (delete the relationship between

 the two objects but does not delete the target object itself)

(4, ID) link to existing record with id = ID (adds a relationship)

(5) remove all (like using (3,ID) for all linked records)

(6, 0, [IDs]) replace the list of linked IDs (like using (5) then (4,ID) for each ID in the list of IDs)

postgresql from treminal

 

In this blog we will explain many ways that help us to control postgresql from terminal

 

 

Connect To Postgresql 

psql postgres

  

restore dump backup database in postgresql
pg_restore -U postgres -d coffee -1 /home/user_name/Downloads/db_backup_name.dump

or
pg_dump DB_name  > /home/user/Desktop/db_backup_name.dump

 

restore ZIP backup database in postgresql 

curl -X POST -F 'master_pwd=1234' -F 'name=DB_name' -F 'backup_format=zip' -o /home/user/Desktop/back_up.zip http://localhost:8069/web/database/backup 

 

Create new database

CREATE DATABASE DB_name;

Connect one database
psql db_name user_name

 

Delete database 

DROP DATABASE DB_name

Rename database
ALTER DATABASE DB_name RENAME TO DB_new_name

 

Copy database
CREATE DATABASE New_DB_name
WITH TEMPLATE Existed_DB_name;