11 CS - End of unit 8 test (with Q's on unit 2) - Soheil Meskini | Library

Instructions

Answer all the questions.

4

Variables and constants are used for data storage in computer programs.
Discuss the similarities and differences between these data stores. [4]

6

A programmer is writing a program that stores data about items stored in a warehouse. Suggest suitable data types for:

6

Write a short pseudocode algorithm to input a password, check that it has exactly 8 characters in it, check that all the letters are upper case, and output the message "Password meets the rules" if both these conditions are true. [6]

3

A computer file, "Message.txt", stores a line of text.
Write an algorithm in pseudocode to display this line of text. [3]

6

a) Describe the purpose of each statement in this algorithm. [2]

b) Identify, using pseudocode, another loop structure that the algorithm in part a could have used. [1]

c) Write an algorithm, using pseudocode, to input a number between 0 and 100 inclusive. The algorithm should prompt for the input and output an error message if the number is outside this range. [3]

4

Explain why programmers find library routines useful when writing programs. Include in your answer with two examples of library routines that programmers frequently use. [4]

3

A system uses even parity.
Indicate whether the following bytes would fail or pass an even parity check:
a)
b)
c)

2

Explain the term data packet.

3

Data packets contain a header.
Name three components that you would expect to find in a header.

2

Data packets also have a payload and a trailer.
Explain these two terms.

6

Match the description of transmission taking place with correct term:

Draggable item		Corresponding Item
Data sent one bit at a time down a single wire in both directions simultaneously		Simplex, Serial
Data sent 16 bits at a time down 16 wires in both directions, but not at the same time		Full duplex, Serial
Data sent one bit at a time down a single wire in both directions, but not at the same time		Half duplex, Serial
Data sent one bit at a time down a single wire in one direction only		Half duplex, Parallel
Data sent 16 bits at a time down 16 wires in both directions simultaneously		Full duplex, Parallel
Data sent 8 bits at a time down 8 wires in one direction only		Simplex, Parallel

7

Indicate which statements about USB are True and which statements are False:

	True	False
USBs use a protocol that allows for error-free data transmission between device and computer
USBs can support any cable length between device and computer
USBs use serial data transfer
USB connections can transfer data using half-duplex or full-duplex
It is difficult to add more USB ports to a computer using USB hubs
USB data transfer rates are much faster than, for example, Ethernet connections
There is no need for devices to have a power source because USB cable supplies 5V of power

	String	Integer	Boolean
Item name
Manufacturer
Description
Number in stock
Reorder level
Whether the item is on order or not

	String	Integer	Boolean
Item name
Manufacturer
Description
Number in stock
Reorder level
Whether the item is on order or not

11 CS - End of unit 8 test (with Q's on unit 2)

11 CS - End of unit 8 test (with Q's on unit 2)

Variables and constants are used for data storage in computer programs.Discuss the similarities and differences between these data stores. [4]

A programmer is writing a program that stores data about items stored in a warehouse. Suggest suitable data types for:

Write a short pseudocode algorithm to input a password, check that it has exactly 8 characters in it, check that all the letters are upper case, and output the message "Password meets the rules" if both these conditions are true. [6]

A computer file, "Message.txt", stores a line of text.Write an algorithm in pseudocode to display this line of text. [3]

Explain why programmers find library routines useful when writing programs. Include in your answer with two examples of library routines that programmers frequently use. [4]

A system uses even parity. Indicate whether the following bytes would fail or pass an even parity check:a) b)c)

Explain the term data packet.

Data packets contain a header. Name three components that you would expect to find in a header.

Data packets also have a payload and a trailer. Explain these two terms.

Match the description of transmission taking place with correct term:

Indicate which statements about USB are True and which statements are False:

Variables and constants are used for data storage in computer programs.Discuss the similarities and differences between these data stores. [4]

A programmer is writing a program that stores data about items stored in a warehouse. Suggest suitable data types for:

Write a short pseudocode algorithm to input a password, check that it has exactly 8 characters in it, check that all the letters are upper case, and output the message "Password meets the rules" if both these conditions are true. [6]

A computer file, "Message.txt", stores a line of text.Write an algorithm in pseudocode to display this line of text. [3]

Explain why programmers find library routines useful when writing programs. Include in your answer with two examples of library routines that programmers frequently use. [4]

A system uses even parity. Indicate whether the following bytes would fail or pass an even parity check:a) b)c)

Explain the term data packet.

Data packets contain a header. Name three components that you would expect to find in a header.

Data packets also have a payload and a trailer. Explain these two terms.

Match the description of transmission taking place with correct term:

Indicate which statements about USB are True and which statements are False:

Variables and constants are used for data storage in computer programs.
Discuss the similarities and differences between these data stores. [4]

A computer file, "Message.txt", stores a line of text.
Write an algorithm in pseudocode to display this line of text. [3]

A system uses even parity.
Indicate whether the following bytes would fail or pass an even parity check:
a)
b)
c)

Data packets contain a header.
Name three components that you would expect to find in a header.

Data packets also have a payload and a trailer.
Explain these two terms.

Variables and constants are used for data storage in computer programs.
Discuss the similarities and differences between these data stores. [4]

A computer file, "Message.txt", stores a line of text.
Write an algorithm in pseudocode to display this line of text. [3]

A system uses even parity.
Indicate whether the following bytes would fail or pass an even parity check:
a)
b)
c)

Data packets contain a header.
Name three components that you would expect to find in a header.

Data packets also have a payload and a trailer.
Explain these two terms.