Ensurepass

QUESTION 11

A data warehouse database is designed to:

 

A.

Enable business decisions by collecting, consolidating, and organizing data.

B.

Support a large number of concurrent users.

C.

Support real-time business operations.

D.

Require validation of incoming data during real-time business transactions.

 

Correct Answer: A

 

QUESTION 12

You are creating a variable for an application.

 

You need to store data that has the following characteristics in this variable:

 

clip_image002Consists of numbers and characters

clip_image002[1]Includes numbers that have decimal points

 

Which data type should you use?

 

A.

String

B.

Float

C.

Char

D.

Decimal

 

Correct Answer: A

Explanation:

Need a string to store characters.

 

 

QUESTION 13

HOTSPOT

For each of the following statements, select Yes if the statement is true. Otherwise, select No. Each correct selection is worth one point.

 

clip_image004

 

Correct Answer:

clip_image006

 

 

QUESTION 14

You are creating an application for a help desk center. Calls must be handled in the same order in which they were received. Which data structure should you use?

 

A.

Binary tree

B.

Stack

C.

Hashtable

D.

Queue

 

Correct Answer: D

Explanation:

A queue keeps the order of the items.

 

 

QUESTION 15

You have a class with a property.

 

You need to ensure that consumers of the class can write to the value of the property.

 

Which keyword should you use?

 

A.

value

B.

add

C.

get

D.

set

 

Correct Answer: D

Explanation:

Set:

The set { } implementation receives the implicit argument “value.” This is the value to which the property is assigned.

 

* Property. On a class, a property gets and sets values. A simplified syntax form, properties are implemented in the IL as methods (get, set).

 

 

QUESTION 16

You are developing a webpage that enables students to manage races.

 

The webpage will display two lists: past races and upcoming races. The page also contains a sidebar with contact information and a panel with social media settings that can be edited. Race results can be shared on social media.

 

How many components will be on the webpage?

 

A.

2

B.

3

C.

4

D.

5

 

Correct Answer: C

 

 

QUESTION 17

The elements of an array must be accessed by:

 

A.

Calling the item that was most recently inserted into the array.

B.

Calling the last item in the memory array.

C.

Using an integer index.

D.

Using a first-in, last-out (FILO) process.

 

Correct Answer: C

 

 

QUESTION 18

This question requires that you evaluate the underlined text to determine if it is correct.

 

Converting an object to a more general type is called upcasting.

 

Select the correct answer if the underlined text does not make the statement correct. Select “No change is needed” if the underlined text makes the statement correct.

 

A.

No change is needed

B.

downcasting

C.

interfacing

D.

flexing

 

Correct Answer: A

Explanation:

Casting up a hierarchy means casting from a derived object reference to a base object reference.

 

 

 

 

 

 

 

QUESTION 19

You create an object of type ANumber. The class is defined as follows.

 

clip_image008

 

What is the value of _number after the code is executed?

 

A.

Null

B.

0

C.

3

D.

7

 

Correct Answer: C

 

 

QUESTION 20

You are creating the necessary variables for an application. The data you will store in these variables has the following characteristics:

 

clip_image002[2]Consists of numbers

clip_image002[3]Includes numbers that have decimal points

clip_image002[4]Requires more than seven digits of precision

 

You need to use a data type that will minimize the amount of memory that is used.

 

Which data type should you use?

 

A.

decimal

B.

double

C.

byte

D.

float

 

Correct Answer: B

Explanation:

The double keyword signifies a simple type that stores 64-bit floating-point values.

Precision: 15-16 digits

Incorrect:

Not D: The float keyword signifies a simple type that stores 32-bit floating-point values.

Precision: 7 digits

 

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