Programming & Computer Science Answers

DESCRIBE the TWO (2) congestion control mechanisms supported by DCCP.

EXPLAIN any FIVE (5) differences of DCCP from Transmission Control Protocol (TCP)

DISCUSS at least FIVE (5) differences between X.25 and Frame Relay protocols. 

Briefly EXPLAIN X.25 and Frame Relay protocols, their protocol layers and equipment used

ANALYSE the interrelation between SONET and ATM. 

Briefly EXPLAIN the SONET protocol with its network elements

Write a Java GUI application that will keep track of a company’s products. The application must

contain the product id, product name and the product price.

Q.3.1 On the form, create three text fields to capture the product details and a non‐

editable text area to display the product details. Create a submit button that

when clicked will save the product details to a Products.txt file. Also include a

search button that will allow a user to search for a product based on the product

id.

Q.3.2 Create a sequential file (products.txt) that contains data for the following fields:

 The product id

 The product name

 The product price

Q.3.3 Load the product details from the Products.txt file. Populate the text area on

form load and whenever a new product is saved

Write a Java application and use a Two dimensional array to store five Dutch, French and Italian

translated words. Use a single array to store the English words.

Your program must:

Q.2.1 Contain a single array to contain the following five English words and a Two

dimensional array to store the following Dutch, French and Italian translated words.

ENGLISH WORD DUTCH WORD FRENCH WORD ITALIAN WORD

sky hemel ciel cielo

run rennen courir correre

study studie etude studia

music muziek musique musica

dog hond chien cane

Q.2.2 Print out each English word with the translated Dutch, French and Italian word.

Develop a Java GUI application that will display the ink cartridge usage of three different printers with a time span of three years.

Q.1.1 On the form, create two combo boxes, to allow a user to select between three different printers and years. When a user has selected a printer and year and clicked the submit button, display the amount of ink cartridges used for that year. Use the following table for the printers and yearly cartridges used:

2019 Epson K750 15 22 12

2020 HP Deskjesk 650 10 35 20 Epson K750 15 22 12

Q.1.2 You are also required to create a menu system which will allow the user to exit the application under the file menu. Under the tool’s menu, allow the form submission and an option to display the yearly ink cartridges used for each printer. The layout of the form is left to your discretion. Marks will be allocated to the presentation and effectiveness of the layout, but the following layout is displayed for your convenience

Write a PL/SQL code to find the sum of digits of even digits from a number fetched from a table using implicit cursors and check if the sum is prime number or not.