Enroll a student identified by her snum into the class named 'Introduction to Database Systems' is the following transactions, state the SQL isolation level you would use.
1. Enroll a student identified by her snum into the class named 'Introduction to Database Systems'.
<u>Explanation:</u>
Since enroll is unique in the university enrollment database schema and field name is SNUM and it is data type is an integer. To identify student class name and department name and name of student SNUM field is used for searching in university enrollment database schema. Enrollment changing is not possible of the student’s not possible or not good practices in university enrollment database schema.
If a query had been made class wise or department wise enrollment is played an important role.
For assign, a faculty is made on the class id or department id.
Answer:
Super
Explanation:
In object-oriented programming (OOP) language, an object class represents the superclass of every other classes when using a programming language such as Java. The superclass is more or less like a general class in an inheritance hierarchy. Thus, a subclass can inherit the variables or methods of the superclass.
Basically, all instance variables that have been used or declared in any superclass would be present in its subclass object.
Hence, when the keyword super is followed by a parenthesis, it indicates a call to the superclass constructor and it should be the first statement declared in the subclass constructor.
Answer: The SFD is the eight-bit (one-byte) value that marks the end of the preamble, which is the first field of an Ethernet packet, and indicates the beginning of the Ethernet frame.
Answer:D)Conversion tracking
Explanation:Conversion tracking is the tool that helps the user to know about the interaction of the ad given by him with customer. It helps in the tracking in the ways like calls from ads, call conversion importing,mobile website gaining the number of clicks etc.
Thus, Adam needs to use the conversion tracking tool which for driving the calls towards his store.He can track the effectiveness of the ad which drives the calls.
Other options given are incorrect because they cannot keep the record of the ads seen by the customer with the help of tracking. Thus the correct option is option(D).
Answer:
The correct answer to the following question will be "Math.sqrt(area*2)".
Explanation:
- The Math.sqrt( ) method in JavaScript is used to find the squares root of the given figure provided to the feature as a variable.
- Syntax Math.sqrt(value) Variables: this function takes a single variable value that represents the amount whose square root is to be determined.
- The area of the figure is the number of squares needed to cover it entirely, like the tiles on the ground.
Area of the square = side times of the side.
Because each side of the square will be the same, the width of the square will only be one side.
Therefore, it would be the right answer.