Databases Questions and Answers September 24, 2021

A small business has five departments, Accounting, Sales, Purchasing, Production, and IT. The number of host addresses needed in each department is 6, 50, 15, 30, and 4, respectively. The subnet between the two routers needs two host addresses. The classful address assigned to the business is 205.16.X.0. {X has to be replaced with the following

A student wants to enroll in Math 170 Discrete Mathematics. If the student has already taken the course and passed (grade of 2.0 or better), or taken and failed the course 2 times, they cannot enroll again. Use your query to determine if student 3729 can enroll in the course. Can student 5430 enroll in the course? Include the sql statement you

Assuming an IntNode class defined like this: public class IntNode { public int data; public IntNode next; public IntNode(int data, IntNode next) { this.data = data; this.next = next; } public String toString() { return data + ""; } Implement a method that will add a new integer before a target integer in the list. The method should return a

When sending an email attachment: Select one: a . It's best to send only one attachment per email message. b . Attaching the file to the message should be the last thing we do before hitting "send". c . We know that if it attaches to our message then the recipient can open it . d . We should consider whether the recipient will feel comfortable

b) [5] Represent the contents of the five output frames for a synchronous TDM multiplexer that combines four sources sending the following characters. Note that the characters are sent in the same order that they are typed. The third source is silent. Source 1 message: YOU Source 2 message: WILL Source 3 message: Source 4 message: GET Source 5

All components of an array are of the same data type. True False

q , software is produced by a community of developers worldwide who write and maintain the code. The code is available for download and can be changed to meet the users' needs. Open source Application Proprietary Operating system

Python pls no def check input 8 3 and 6 8 To practice python fundamentals \& UMPIRE: 2D Lists Review, Problem Drills, UMPIRE Practice Problem Statement: Given two positive integers n and m, create a two-dimensional array of size nm and populate it with the characters "." and "m" in a chequered pattern. The

Note: Each question may have more than ONE choice as correct answers. 8) Which of the following statement is/are FALSE?- A. For an infected computer, firewall can scan viruses and other malware, then remove them, or quarantine the infected files. B. Biometric devices use human intrinsic characteristics to authenticate users. There are two main

In matlab script, thank you! Write a MATLAB script that will generate random integers in the range from 1 to 100, and print them, until one is finally generated that is greater than 50. The script should print how many attempts it took

Consider the following relational schema. An employee can work in more than one department; the pct time field of the Works relation shows the percentage of time that a given employee works in a given department. Emp( eid: integer, ename: string, age: integer, salary: real) Works( eid: integer, did: integer, pct time: integer) Dept( did: integer,

public class SumOverArray { public static int IterateAndSum (intllmann) { } } public class NumberSumLength { public static boolean checkNumber PowerLength (long num) { return false; } } Create a method that iterates over an integer array and returns their sum. Value: 30 points Implement the numberSumLength method that, given an integer, raises

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import java.util.AbstractList; import java.util.List; import java.util.RandomAccess; import java.lang.RuntimeException; import java.util.Arrays; public class Vector extends AbstractList implements List , RandomAccess { protected Object[] data; protected int size; public int size() { return size; } private void rangeCheck(int index) { if (index < 0

An assembly program defined two macros - Macro_A and Macro B. Macro_A contains 7 instructions of which 2 are call to Macro_B. Macro B contains 10 instructions. The main assembly program contains 25 instructions of which 2 are calls to Macro_A and 3 are calls to Macro B. How many machine code will be created for this assembly program

Q1. (100 pts.) Making Calculator fool-proof Consider the Calculator class given in Listing 9.5 of the textbook. Your task is to make this program fool-proof: any exceptions that may be generated at run-time will be resolved, any invalid input will be corrected through additional user prompts (i.e., ask for another input value) and all problems

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Listen Which type of virus is written as a list of commands that can be set automatically to run as soon as a computer user opens the file? rootkit macro adware keylogger

I need c# code c# c# c# 2: For the following equation: (50 Points) f(x)=6x7+3x3+sin(2x) where x is in radians. a) Calculate the x and y values for 0

Examine the validPassword method defined below: ? ? * * Purpose: determine if the password is valid ( has enough characters ) Parameters: String password - the password to check int minLength - the minimum length for a password to be valid Returns: boolean - true if the password has enough characters * / public static boolean validPassword (

What caused the start _ date _ report.py script to crash? 1 point The script had a ValueError due to invalid input range. The script crashed due to a FileNotFoundError. The script experienced a SyntaxError due to incorrect function usage. The script crashed due to a TypeError caused by string inputs.

I want to draw a class diagram, not words, I want to draw it. The homework is required to draw the drawing, please understand me .. The system should allow employees to log in using their unique credentials. The system should capture the employee's picture upon login and store it in a secure location. The system should be able to track the

2 . 5 Discussion: Plotting in MATLAB, Time Domain, and Phase Space ( Plotting Part 2 ) For all discussions, refer to the Course Discussion Overview. This is the second part of a two - week discussion. Please review Part 1 in Module 1 and then proceed to answer Part 2 below. Initial discussion posts should be made by the middle of the module's

Suppose you are given a stack of n pancakes of different sizes. You want to sort the pancakes so that smaller pancakes are on top of larger pancakes. The only operation you can perform is a flip insert a spatula under the top k pancakes, for some integer k between 1 and n , and flip them all over. For every positive integer n , describe a stack of

Which of the following statements reflects the type of retrieval you can perform with aggregate functions? Determining the number of rows in a table Finding the highest, lowest and average values in a table column Determining the number of rows that meet a specific condition All of the above

Modify the following code to implement a 2 digit BCD counter for an FPGA in Verilog language: // inputs: // KEY0: manual clock // SW0: active low reset // SW1: enable signal for the counter // // outputs: // HEX0 - HEX3: hex segment displays module part2 (SW, KEY, HEX3, HEX2, HEX1, HEX0); input [1:0] SW ; input [0:0] KEY ; output [0:6] HEX3, HEX2,

GIVE ME THE OUTPUT/IMAGE OF THE CODE BELOW #include void init() { glClearColor(1.0, 1.0, 1.0, 1.0); // set background color to white glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(0.0, 512.0, 512.0, 0.0, -1.0, 1.0); } void display() { glClear(GL_COLOR_BUFFER_BIT); // clear the screen // Mark // Draw Background glBegin(GL_QUADS);

Suppose that a CSS rule uses the selector q . dark. The rule matches elements whose type is dark and whose class attribute has a value of " q " .

In Python Previously, an X was used to represent every integer value. However, we don't have space to represent large values using the approach (e.g., it would be unreadable if the values were in the hundreds or thousands). Therefore, we need to scale the bars so that each X represents a larger quantity We will display the bars as percentages,

When hardening applications, which of the following should you do first? Question 4 8 Select one: A . Use Microsoft Security Compliance Toolkit ( SCT ) to apply the least privilege principle to applications. B . Conduct penetration tests to discover vulnerabilities. C . Remove unneeded application components. D . Harden the operating system.

7.13.1. Design Test Cases: State Testing A Stringutils class contains a reverse () method, with a signature as presented below. List test cases, which would verify that this method really reverses the input String! Listing 7.35. Signature of reverse Method public String reverse (String s) {...} 7.13.2. Design Test Cases: Interactions Testing

I need to convert this C++ code to C. Chegg experts answered this question twice wrong so far and they only copy pasted my code for some reason (I filed a complaint) This is the code. I will repeat I NEED IT IN C RIGHT NOW ITS C++ #include "stdafx.h" #include #include #include #include using namespace std; const int Maxn = 200; vector d[Maxn]; int

In this exercise, you'll start from a table that looks like this: Then, you' 1 1 expand and format the table, so it looks like the one that follows. Lmployee Iable Create one HTML file. Note that this HTML file uses embedded CSS in the head section to do the formatting. Expand the HTML so the table has the caption and data shown in the second

Module 8 : A major difference between direct distribution ( exclusive agents ) in property insurance and indirect ( independent agents ) distribution is: Group of answer choices Number of insurers represented Types of products sold State licensing All of the above None of the above

From worksheet Laptop, in cell E18, find the sum of price that has discount

(8 pts) This question tests your understanding of proofs for asymptotic notations. (a) Let f(n)=3n21000. In order to prove that f(n)(n2), we need to find a positive constant c>0 and an integer N1 such that f(n)cn2,foreverynN. Answer the following questions on the answer sheet. (a1) Will c=1,N=8 make the proof correct? (a2) Will c=3,N=12 make the

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Solve above by design MAC(model algorthmic control) mathmaticaly and by using matlab Inlet Outlet W Cold water Hot water Control valve Fig. 3.4. Water heater 3.4 Case Study: A Water Heater This example shows the design of a DMP to control the outlet temperature of a water heater. Notice that a MAC can be designed following the same steps. Consider

Which approach suggests starting with an enterprise - wide data warehouse? Select one: a . Circular b . Top - down c . Linear d . Bottom - up

Part B : Calculate the digital output of the ADC 0 8 0 4 and determine which LED will be ON for the following output voltage readings of the LM 3 5 temperature sensor: 2 . 0 4 V 1 . 0 2 V 0 . 5 1 V

Which tool is used to Migrate DTS packages? SQL Server Import and Export Wizard Package Migration Wizard Package Configuration Wizard Package Installation Wizard

Complete this sentence. The Linux command you should use to create single or multiple files, view the contents of a file, concatenate files, and redirect output in the terminal or other files is the _ _ _ _ command. 1 point cat cut grep overwrite

A good Database Management System ( DBMS ) will perform well even with a badly designed database. Question 9 Answer True False

Use MATLAB to find the poles and zeros Use MATLAB to find the poles and zeros (a) G(s) _10(s+2) s(s+1)(s+10) 10s(s+1) (s+2)(* + 3s +2) (e) G(s)=_10(s+2) s(s* +2s+2) (d) G(S) 10s(s+1)(+2) (a) G(s) _10(s+2) s(s+1)(s+10) 10s(s+1) (s+2)(* + 3s +2) (e) G(s)=_10(s+2) s(s* +2s+2) (d) G(S) 10s(s+1)(+2)

Which one of the following is a conditional macro which will work when the main conditional macro fails #else #elseif #if O #endif Which one of the following will terminate the program and display a message? #file _LINE__ #error _FILE__ Which one of the following math functions of C++ is used for calculating the cube of x? Osqrt(x, 3); O cube(x):

Implement using Verilog a circuit that accomplishes the following: Implement the Function unit(Red circle), Figure 7-9 Show simulation results (Modelsim or ISIM) to prove your design Load enable A select B select A address Write B address D data Load RO Load R1 MUX MUX 2 Load R2 3 Load R3 0 1 2 3 Decoder Register file B data A data D address 2

C++, coding on code:: Blocks Minilab Inheritance 1. As you do the steps, but sure to fill in the syour answer here> parts... Also, be sure to do them IN ORDER. 2. There is a class called Rectangle for this Minilab. It defines a geometric rectangle open it and look at it to see if it makes sense. Now that you have a Rectangle class to work with,

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Node Two or more computers connected together Every device connected to a network Central location of the computer network A network security device that monitors incoming and outgoing network traffic and permits, or blocks, data packets based on a set of security rules

2-) Processor Implementation Details: P&H(4.2) <4.1>. The basic single-cycle MIPS implementation in Figure 4.2 can only implement some instructions. New instructions can be added to an existing Instruction Set Architecture (ISA), but the decision whether or not to do that depends, among other things, on the cost and complexity the proposed

Given a program with 1 7 1 million instructions, 3 0 % of type A , 4 0 % of type B and 3 0 % of type C , what is the execution time ( in milliseconds ) on a machine with a clock frequency of 3 . 8 GHz if CPI ( A ) = 1 . 7 , CPI ( B ) = 3 . 8 , CPI ( C ) = 3 . 7

Python program help, indentation issues i have an input.txt and output.txt file and i think my indentations are screwed up for the program below. thank you for the help input.txt 4 1 8 3 9 5 7 2 4 9 4 code: # Function to do insertion sort def insertionSort(arr): # Traverse through 1 to len(arr) for i in range(1, len(arr)): key = arr[i] # Move

Page of 2 ZOOM public class MultiplicationTable { private int columns; private int rows; public MultiplicationTable() { columns = 5; rows = 5; } public MultiplicationTable( int columns, int rows ) { this.columns = columns; this.rows = rows; } public int getColumns() { return columns; } public int getRows() { return rows; } public int cellSize( int

DXAMINATION / Start Exant Tap Complies Which twe Support Vector Machine hyperparameters are most important to tune with a radul kernel ( SajocT ALL correct answers A C . De Next

What detection and response product combines different capabilities into a single product in addition to orchestration and automation? a . MDR b . EDR c . SDR d . PDR e . XDR

Exercise 2 Consider the following Python code: def collatz(n): ## HERE return n/2 return 3 n1 n-int(input ("Enter integer: )) while (n1) print (n) n-collatz(n) (i) Draw a stack diagram at the time ## HERE is found. i) Translate the above program into MIPS. Try to make your translation as faithful as possible

web development 1. Revise the paragraph element to use inline CSS styles to configure the background color of green and the text color of white for the paragraph. 2. Write the code for embedded CSS styles that configures a background color of #eaeaea and a text color of #000033 for the entire page. 3. Write the code for an external CSS style sheet

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When a programmer uses ODBC to execute queries on a database the programmer is interacting with a . an ODBC driver b . a driver manager c . a high - level ODBC API d . stateless service

Question (15 pts.) Convert the decimal numbers from 0 to 32 to BCD, Hexadecimal, Octal, and Binary, using the minimum number of bits or digits, and without using calculators Fill your results in the table below. BCD Hex Oct |

Which of the following protocols is used for sending emails over the Internet? A . SMTP B . FTP C . HTTP D . SNMP

What is meant by a "tab - delimited" data file? A . The data is limited by several tab characters at the end. B . The file size is unlimited by the tab character. C . The data is not allowed to contain tabs or spaces. D . The data items in the input file are separated by tabs .

(Weight: 20%) For the following T(n) find values of no and c such that cn3 is larger than T(n) for all n larger than no 1" T(n) n3-5n20n 10 2. (Weight: 1596) Write a program that compares the values of y1 and y2 in the following expressions for values of n up to 100 in increments of 10. Does the result surprise you? y1 100 n 10 3" (Weight: 45%)

Using Python. Create a shape Class with one data member called side1 and two class methods called getArea and getPerimeter. They are empty methods or abstract methods. You can write empty methods as def getArea(self): pass Or def getArea(self): Or def getArea(self): return Or def getArea(self): return 0 Create a Class called Square as a subclass

8) Fill in the blanks and run the code. make CF=1 ; BL =00010101 ; CL=2 number of times for rotation RCL BL= b CF= (from program) 9) Number DUP (value) EXAMPLE: DATA1 DB 6 DUP (OFFH) ; FHLL 6 BYTES WITH FF FlLL 4 BYTES WITH 5 (Varie 10) Run the code. ORG 100h MOV AL, VAR1 ; check value of VAR1 by moving it to AL. LEA BX, VAR1 ; get address of VAR1

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Suppose that we have a stack S that supports the following operations PUSH (S, x), which pushes an element x on top of the stack S, PoP (S), which removes the element at the top of stack S, and MuLTIPoP (S, k), which removes the top k elements from the stack S (if we try to remove more elements than the current number of elements on the stack in a

Suppose we are using a three-message mutual-authentication protocol, and Alice initiates contact with Bob. Suppose we wish Bob to be a stateless server, and it is therefore inconvenient to require him to remember the challenge he sent to Alice. Let us modify the exchange so that Alice sends the challenge back to Bob, along with the encrypted

Consider the following forwarding table. Destination Address Range Link Interface 10000011 00000001 00110000 00000000 through 10000011 00000001 00110111 11111111 0 10000011 00000001 00111000 00000000 through 10000011 00000001 00111111 11111111 1 10000011 00000001 00110000 00000000 through 10000011 00000001 00110001 11111111 2 10000011 00000001

Background: The purpose of this assignment is to get practice working with functions. Functions are the backbone of C programs . We need to get very comfortable with how to define and call functions. Functions are a problem-solving strategy. Functions break a large, complex problem into smaller, more manageable pieces. As shown in the Savitch,

Question: 5 1 - 1 2 Which of the following would not be true of a confidentiality agreement? Confidentiality agreements should contain permissible uses Confidentiality agreements protect proprielary information such as intelleccual property Confidentiality agreements should contain impacts of non - compliance Confidentiality agreements expire at

1: Write a Program that, ask the user values of [a, b, c, d,s1 and s2] finds the x and y for the following equation system. Use different methods for each approach. (50 Points): ax+by=s1cx+dy=s2 a) Calculate using analytical approach. (Hint: Matrix approach) b) Calculate using Jacobi method. Jacobi method should be run 100 iterations. c) Compare

can you help with java code? Write a class called ArrayHelper that contains the following methods: A static method called isSorted that accepts an array of real numbers (double) and returns true if the list is sorted in ascending order. A one element array is considered sorted. Return false if the array is null. A static method called isReverse

Before you walk away from this project, take a moment to add the new information to your VMclients page in your wiki. Go to the Virtualization:VMclients page, click Edit at the bottom of the page, and add the new VM to your list. Include the module number, hypervisor used, VM computer name, and VM operating system. Also note any additional

Q5 (10 pts) For each of the following 5 statements, check the corresponding box on the answer sheet if and only if the statement is true. (a) If f(n)O(n) and g(n)(n), then f(n)+ng(n)(n2). 2 (b) If f(n)O(n) and g(n)(n), then nf(n)+g(n)(n2). (c) If f(n)O(n), then nf(n)+1000n(n2). (d) If f(n)O(n), then nf(n)+1000n2(n2). (c) n!O(3n). Q5: Read the

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You are going to enhance a computer, and there are two possible improvements: either make multiply instructions run six times faster than before, or make memory access instructions run two times faster than before. The computer is used for a program that takes 2 0 0 seconds to execute. Of this time, 1 0 % is used for multiplication, 7 0 % for

import java.util.Scanner; public class DoSum { public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; int previous; int sum = 0 ; int x = 0 ; do { System.out.print ( " Enter an integer ( 0 to stop ) : " ) ; int current = in . nextInt ( ) ; if ( current = = previous ) { break; / / Break the loop if the same value

A security analyst enters chmod u + w , g - r access.txt into the command line. What does this command do ? It removes write and read permissions for the user and group on the access. t x t file. It adds write and read permissions for the user and group on the access.txt file. It adds write permissions for the group and removes read permissions

Which of the following command extracts a specified zipped tar file while listing information about the extracted files?

PROBLEM SOLVING please answer full question! QUESTION 2 [20 MARKS] Based on program output shown in Figure 2, answer the following question. Insert your number: 5 Total = 5 Insert your number: 3 Total = 8 Insert your number: 2 Total = 10 Figure 2: Program Output You must apply the following tools to design a solution for the problem. In other

Using 2 ' s complement binary representation, the result for 1 0 0 0 0 0 - 1 0 0 0 1 1 Select one: a . 1 1 1 0 1 1 b . 0 0 0 0 1 1 c . 1 1 1 1 0 0 d . 1 1 1 1 0 1

Create another main file called shape _ main.cpp . In this one, the user will be prompted to choose a rectangle or a triangle. Followed by a prompt asking for height and width if it is a rectangle, base instead of width if it is a triangle. Then, it will return the area for the chosen shape and dimensions. Create a new triangle.hpp and

symbols for 3) Compare the orders of the following pairs of functions, use only o, w or comparison. Prove your claim. Ign? a) lg( Ign); b) n 21g(n2 + n +lg(n")); c) 3n" +n! ; d) nh+ 3n lg(n) +n. (0.5); e) 5n3 + 3n4 + 11n6 + 3; (n lg(n)) 25n100 + 21 4 n lg(n )+ 12n+ lg(n) 1512 + 11n4 + 2n6 + 34n5 +13 A n; n

Redo Log Files contain: Select one: all changes made to data all the database data sql query

PYTHON 11.12 LAB: Complex Numbers Write a class complex) that contains methods getNum0 and add). The getNum user and the add0 method should return the sum of the complex numbers. Ex: method is required to get complex numbers from the Enter the real and imaginary parts of the complex number: 12,21 Do you wish to enter another complex number? y

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please give the explanation and answers Problem 3. The company Boston Dynamics is an engineering and robotics design company. Their design team have decided to start a secret project with the code name: the Avengers Initiatives. Their project consists of creating the new Iron Man suit. The design team is debating between choosing a pipelined or

Which of the following is a modular server that is thin and has the very bare basic components to slide in a chassis on its side? Blade Server Standalone Server Rack Server Proxy Server

Please write the code is RISC V assembly this is the software I use Task 2: Implement a recursive procedure gcd(a,b) that uses Euclid's algorithm to find the greatest common divisor of two positive integers a and b. referring to the following pseudo-code: gcd (x,y){ if (y=0) return x; else gcd(y,x%y); \} Write a main program that i) asks the user

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Question 1 (4 points) Analyze the snippet of code below. This snippet of code is using a queue. Identify whether the queue is a regular queue or a priority queue. Explain how the queue behaves when the tail reaches the end of the queue. public void Enqueue (int newElement) t. Q[tail] = newElement: if (head ==1 ) head =0; else if (Q[head] \&

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Consider the following constellation diagram and a host transmitting the symbol highlighted in blue. Assume that due to transmission errors, the received combination of amplitude and phase falls closer to one of the neighboring points. What is the maximum number of bit errors that can occur? 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010

Write a C program that reports how many lines, words, and characters in an input text file with more than 300 words, and at least 3 paragraphs, and also makes a sorted list of all words found in it. You are required to provide the text file. Write the sorted list to an output file, along with the number of times each word appeared in the input

solve it asap Q1: Consider the data set mentioned in link and apply k-mean clustering, considering the following conditions. 1. Map all the non integer columns to the integer values. 2. Apply pre-processing to clean data set. 3. Find optimal number of clusters. 4. Plot the clusters using scattered plot using different colors. 5. Pick 80 random

Please note this is a programming problem, answer must be in code format (MATLAB or Java or Python or anything you want). Include output as well, thank you! 3. (15 points) Computer problem. For the logistic model, y, 100y(1-y), y(0)-0.1, solve the ODE for 0

The software program that manages all of the other application programs in a computer is called the CNP ( cloud - native platform ) OS ( operating system ) PEC ( privacy - enhancing computation ) RAM ( random access memory )

Representing the game board A game board can be thought of as a table with rows (see the constant N_ROWS) and columns (N_COLUMNS). The size of a game board does not change during the course of a game. For example, here is an empty game board with 4 rows and 5 columns: 1 2 3 4 5 1 # | # | # | # | # 2 # | # | # | # | # 3 # | # | # | # | # 4 # | # |

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Write a statement to display the month from the regular expression match in result. Note: The given date is in day, month, year order. 1 var re = /(\d+) VC\d+V(\d+/; 2 var date = "17/8/2012"; // Code will also be tested with value "8/11/92" 3 var result = re.exec(date); 5 /* Your solution goes here */ 1 Check Try again

Write a function (s), that input 3 numbers and Return TRUE. If the numbers are relatively prime Return false ctt

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Document Formatting Page B ckground Task Instructions Type Consider the following: at the insertion point, and then press ENTER. MAIN GOALS What are the main goals you want to accomplish in the remodel? Why are you doing this? Improve appearance, increase home value, energy efficiency, or usability?

True or False: SSL certificates are used exclusively for securing web transactions on e - commerce websites. True False

4. Write a function called crim, mean that computes the trimmed mean of a data vector. A trimmed mean is a mean computed after a certain number of observations are removed from both the low and high ends of the sorted data. Typically, the same number of observations are removed from both ends. For example, suppose we want the trimmed mean of the

+ Prove the identity of each of the following Boolean equations, using algebraic manipulation: ( a ) ABC + BCD + BC + CD = B + CD ( b ) WY + WYZ + WXZ + WXT = WY + WXZ + XYZ + XTZ

Provide an HCS12 assembly code that counts the number of bytes in an array of 50 bytes which are divisible by 7 and stores its value at address $1000. Assume that the array is stored at address $8000. Provide an HCS12 assembly code that counts the number of bytes in an array of 50 bytes which are divisible by 7 and stores its value at address

Calculate 4 8 3 7 9 using a ratio table. Show all work so that it is clear that no other multiplication algorithms were used. The table must show reasonable progression from left to right. please draw

(5) Give a grammar (a) Is G a regular grammar? Why? (b) Find an nfa which accepts the language L(G). (c) Find the regular expression r associated with the language accepted by the above nfa (d) Find regular language L(r) from the above r

as an It Manager List prior employment skills and how they relate to the job. List your job - related education or technical training. List non - related training that may be helpful or transferable to this job. List activities or accomplishments that might improve your chance of getting this job.

The value of a salt in storing passwords is that Question 4 options: 1 ) it defeats precomputation attacks. 2 ) it increases the number of bits that an attacker must decrypt. 3 ) it can be hidden from an attacker who compromises the password file. 4 ) it makes all passwords the same length for storage.