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computer science
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january 2021
23

Programming Questions and Answers January 23, 2021

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1.Can you provide an example of how you would use a Subquery in a SELECT, INSERT, UPDATE, and DELETE statement?

Python program to print calculator

Write a program that displays following output (By taking Input),. (A) Input 4 (3 Marks) (B) (4 Marks) Input 3 (Must be odd) 789 10 456 23 1 (C) Input 5 1 222 33333 4444444 555555555 (4 Marks)

Given the grammar S aS S CA A bA A dB B d Which type of grammar is it. Linear Right Linear Left Linear Context free Regular

Write C program to print the following shape Number of stars in line 1 number is 5 number of spaces is 0, number of separated lines between the current line and next line is 1 Number of stars in line 2 number is 4 number of spaces is 1, number of separated lines between the current line and next line is 2 Number of stars in line 3 number is 3

Write a script that will generate seven random integers in the range [-100:200] inclusive and then print the value of each integer and whether it is positive or negative and whether it is even or odd. An output from this program might be: -57 is negative and odd. 26 is positive and even. If zero is one of the random integers generated,

(a) (b) (c) The CITS3001 project this semester featured the game Hanabi, and it is assumed that you are familiar with the game. Suppose that we have observed an agent playing several games, and built a table showing what actions they played, depending on what state the game was in (how many cards had been discarded, whether thay had a playable

Write a program that calculates the future value of an investment at a given interest rate for a specified number of years. The formula for the calculation is future Value investmentAmount (1 monthlyInterestRate) years12 Use text fields for the investment amount, number of years, and annual interest rate. Display the future amount in a text

(a) (b) (c) Describe what is meant by a knowledge base. How does a knowledge base differ from a database 2 marks Suppose we have a knowledge base for an agent exploring the pictured Wumpus World. 555555 Stench S 4 3 2 1 215 55 Stench S START Breeze 555555 Stench 11 Gold Breeze Breeze PIT Breeze PIT PIT Breeze Breeze 2 3 The agent can move up,

What is the output public static void main(String args) String str first second for(int i str.length() 4 i 0 i) (str.length() 1) 4) break System.out.print(str.charAt(i)) if (i

1. Convert the following contextfree grammar into an equivalent grammar in Chomsky Normal Form. Indicate and state each step clearly. G(S,A,B,C,D, a,b,d, S, P) where P S aA abBBC B A aaA B2 B bB bbC D C1 D d

1 83 1,For the finite state automaton given by the transition diagram (a) Find the language accepted by the automaton. Describe it using words. (b) Find a regular expression that defines the same language.

Write a file secretcode.c which allows you to scan in messages encrypted with Toms Secret Code, and then print them out (ending in a newline). Toms Secret Code works two letters at a time. Given some ciphertext (text that has been encrypted with Toms Secret Code), take the first two letters. The first letter of the plaintext (unencrypted text) is

10. Solve this problem using the EM algorithm A sample (11, 12, 13) is observed counts from a multinomial population with probabilities (10, 10, 101). The objective is to obtain the maximum likelihood estimate of 0. The pdf of multinomial distribution for this sample is p(1 0) In order to use EM algorithm, we put this into the framework of an

You work for a road construction company and your manager asks you to list all deadended intersections in the city. You are given an undirected graph G, with vertices representing intersections, and edges representing roads in the city. You can assume that there are no vertices with 0 edges, i.e., all roads are connected. Dead ends are represented

4. Let be an arbitrary alphabet. For every w , if w E, x cx if w xc for some x and c e . For every language L CE, we define p(w) . R(L) xe E x p(y) for some y L. Prove that if L is a regular language, then so is R(L). More specifically, you must show the construction of a DFA for R(L) based on a DFA for L. Present your DFA by giving its

The following statements are all true 89n 20n 5 O(89n 20n 5) 89m 20n 5 O(89n) 89n 20n 5 O(n0) 89n 20n 5 O(n) However, the last one is the simplest, cleanest, and tightest of them, and we will refer to it as the minimal bigO form. Write the following expression in minimal bigO notation. (1) n 3. (2) 3nlog(5n). (3) 100 2 3 (4) 80nlogn 5n n (5)

1. Using roots function, obtain the root of x3x3x7x60. 2. Create a time vector namely I consists of elements from 0 to 10 with increment of 0.5. 3. How to know the size of vector created above using MATLAB 4. Create the following matrix and then get the elements in the last row of the matrix. 1 2 1 A0 1 1 2 1 2 5. Obtain the inverse of A matrix

Recall the definition of logarithm base two saying p log m is the same as saying m 2P. In this class, we will typically write lg to mean log2. (1) How many bits are needed to write down a positive integer n Give your answer in bigO notation, as a function of n. (2) How many times does the following piece of code print hello Assume n is an

Write a computer program for solving a system of linear equations Axb. The program should have the following features Input The program should read the following inputs from a text file(i) the number of equations (n), (ii) elements of the augmented matrix. Please see an example of input data file below. Options The user should have the option of

Suppose we have an assemblerlinkerloader for a new RISCV CPU running a new (hypothetical) operating system OS999. Note that an assembler translates assembly programs into binary code and the linker and the loader together will run the binary code. We have two pro gramming languages D and E. D is a simple programming language that can be used to

Consider the middle 3 digits of your student ID composed of seven digits. Convert it to binary format (each digit is represented by a maximum of 3bits). For example, 1060385 is simplified to 603 and then converted to 110 000 011. Assume now that we want to send your student ID while being able to detect and correct single bit errors. 1.1) 1.2)

a. Show that (2n 4) 0 (n) by using formal definition of 8 notation. b. Prove that f(n) 0 (f(n)) where (n) is asymptotically nonnegative function. In your answer, use the formal definition of O notation.

Let G(V,E) be an edgelabeled digraph, where the label of each edge is a basic sound from a given finite set of sounds S, S2, ..., Sn. Let vobe a special node in G. The construct G,vo, I can be viewed as a formal model for speech recognition from a restricted vocabulary. Each path from nodevo yields a sequence of sounds 0, 02, ...,ok made up of

(1) What are the relative advantages and disadvantages of sequential and binary search (2) Show the resulting Stack data structure after this series of operations insert 30, insert 40, insert 20, delete, insert 60, insert 50, delete, delete (Show the stack contents, in order, and mark the top and the bottom.) Identify the number that results from

a. A graph G(V,E) is called bipartite if we can partition V into two nonoverlapping sets V and V where V V U V such that every edge in G is between a node in V and a node in V. (Note that not every graph is bipartite.) Based on a graph traversal technique, write an algorithm that takes as input an undirected graph G, and returns whether or not G

We framed the principle of optimality as every subsolution of an optimal solution is optimal. But we can relax this definition into even optimal solution can be synthesized from optimal sub solutions. This latter definition is sufficient to derive a recurrence relation that relates a solution to its subsolutions. Since the recurrence relation is

You are given the following algorithm written in pseudocode. Compute its worstcase running time (i.e. T(n)) and also give its order of time complexity. Show each step of your solution. METHOD(A) COST WORSTCASE TIMES 1 2 3 5 6 7 8 9 10 total 0 result 0 for i 0 to lengthA1 do if (i 2 0) for j 1 to length A1 do total total Aj Ai total else Ai

Create a simple program that will let the user enter a message with multiple words. When the user clicks a button the program will parse the message and display each word on separate lines in the output area. You may use regular expression functions or any string manipulation functions.

A university consists of a number of faculties. Each faculty offers several undergraduate programs (such as faculty of Computing and Information Technology at university of Jeddah offers CS, IT, IS). A number of courses make up each program. Students enrol in a particular program and take courses towards the completion of that program. A lecturer

3. Calculate the runtime efficiency for the following program segment (doIT has an efficiency factor 5n). i1 loop i

5. Find the runtime efficiency of the following program segments i) Calculate mean sum 0 x System.in.read() while (x 999) sum x xSystem.in.read() meansumn,5. Find the runtime efficiency of the following program segments i) Calculate mean sum 0 x System.in.read() while (X 999) sum x xSystem.in.read() mean sumn

It is required to report the calculated height of the tank. If the height is h 2, select the correct MATLAB statement that displays height 2 m disp(height num2str( h), m) disp(height 2 m) fprintf(height d m,h) disp(height h, m) fprintf(height 2d m ,h) fprintf(height 2f3.2 m,h)

1. Write a program that prompts the user to input three integer values and find the greatest value of the three values. Note Be careful when handling equal values. 2. Write a program that finds the largest and smallest of four integers entered by user. Enter four integers 21 43 10 35 Largest 43 Smallest 10 3. Write a program that checks if entered

2. Consider the following algorithm. Array A0..n1 contains n integers. Algorithm arrange (A) n A.last for (i 0 to n2) for (j 0 to n2i) if (Aj1 Aj) swap (A, j, j1) a) What does this algorithm compute Describe the strategy of the algorithm. b) Trace the steps of the algorithm on the following array 71 59 28 23 30 8 c) Use the bigOh

Write the assembly code for each of the following using LOOP instructions: 1. Read a character and display it 10 times on the next line. 2. Read a five-character password and overprint it by executing a carriage return and displaying five Xs. There is no need to store the input characters anywhere. 3. Put the sum of 1 + 4 + 7 + + 148 in AX. .5.

Write a query to fetch employee names and salary records. Display the employee details even if the salary record is not present for the employee.??

Create a program in Python Project task: The personal finance manager star_outline unfold_more Project description The personal finance manager is a terminal-based application that helps users manage their personal finances. It will give you the opportunity to apply concepts such as file management, object-oriented programming, error handling, and

A single axial load of magnitude P 15 kips is applied at end C of the steel rod ABC. Knowing that E 30 x 10 psi, determine the diameter d of portion BC for which the deflection of point C will be 0.05 in. A 1.25in. diameter 4 ft Fig. P2.15 B d 3R2 3 ft P

Write a Python program to determine if a given string has balanced parentheses. You are required to implement a function is_balanced that takes a string containing only the characters '(', ')', '{', '}', '[' and ']' and returns True if the parentheses are balanced, and False otherwise. The program should consider the order and nesting of

Write an SQL query to find the current date-time.?

Write a function in C++ that removes vowels from a user inputted c-string that does not utilize pointers. Make sure it does not destroy the original string. The vowels must be completely removed from the string, not replaced with a space or blank.

You decide to create a program which reads the letters a and b then outputs those same letters. Here are the characteristics of the program A third of the output is bs 90 of the time an a is read, it is outputted correctly. 10 it is not outputted correctly (a b is outputted instead). 80 of the time a b is read, it is outputted correctly. 20 it is

Use induction to prove that, for n 0 3 (51 1) 4 n i0 3 5

What is the Nash Equilibrium for the following game, whose payoff matrix is depicted below involving two players P1 and P2 with four choices 1, 2, 3 and 4 players announce their choices in parallel. P2 Choice 1 P2 Choice 2 P2 Choice 3 P2 Choice 4 P1 Choice 1 6, 6 P1 Choice 22, 17 P1 Choice 311, 18 P1 Choice 4 1,1 9,8 8,9 3, 11 1,6 2,3 4,7 1,1 2,1

1. Write a method to calculate the sum of digits of any integer. Your program should ask the user to input a number in the main method and should then call your method to (5 Points) calculate the sum of the digits. Enter a number 3782 Sum of digits of 3782 is 20 2. Write a method to compute the distance between two points A(x1, y1) and B(x2, y2).

a. Write a program that calculates and prints the bill for a cellular company using two plans Plan i. Regular Premium Local calls out of the included minutes are charged as 0.2 fils per second Local SMSS out of the included SMSs are charged as 10 fils per SMS iii. Minutes. iv. 600 SMS 1500 30 100 Ask the user to enter the account number. A valid

The output waveform (Y) of the following circuit is 0 1 0 1 100 1 10 0 0 1 0 0 1 0 1 hgfedcba 0 0 None of the above (ap, b1, c1, d1, e0, f0, g0, h1 (a0, b1, c1, d0,e0,f1,g1,h0 (a0, b1, c0,d0,e0,f0,g0,h1 C

What is the output of the following code segment int n1 switch (n) case 1 cout The number is 1 endl case 2 cout The number is 2 endl break default cout The number is not 1 or 2 endl,What is the output of the following code segment int n1 switch (n) case 1 cout The number is 1 endl case 2 cout The number is 2 endl break

Write a function in MATLAB that calculates the sum of the square roots of all the elements of a 1xn vector. Use recursion. Try your solution for M = linspace(10, 100, 1000)

Given the following binary search code. Please show what will be printed by the program on the screen if the function is called as follows int numbers (8, 15, 22, 29, 36, 54, 55, 61, 70, 73, 88) int target 29 binarySearch (numbers, 0, numbers.length1, target) public static boolean binarySearch (int data, int min, int max, int target) boolean

Which code fragment shall justifiably use malloc() In other words, which malloc() cannot be replaced with static allocation int data data malloc (sizeof (int) 100) struct sigaction sa sa malloc (sizeof(struct sigaction)) char s s malloc (sizeof (char)) int size, array fscanf (stdin, d, size) array malloc(sizesizeof (int)),Which code fragment

What is the output of the following code segment int n1 while (n 10) stdcout n t n

What is the output of the following code segment for (int i1i

5.4) Develop a program that prompts the user for two numbers. Input these numbers into variables Y and X. Using a FOR LOOP or a WHILE LOOP, print each value from Y to X. If the value of X is smaller than Y, print an appropriate message. Develop a program that prompts the user for two numbers. Input these numbers into variables Y and X. Using a FOR

Using karnaugh map, find the prime implicant (s) of the following function F(w, x, y, z) (0, 2, 4, 5, 6, 7, 8, 10, 13, 15)

Write CFG and design PDA for these L (a bmnm even L (a bmnm odd Written and detailed solutions would be rated.

Write a recursive function, power, that takes as parameters two integers and y such that z is nonzero and returns . You can use the following recursive definition to calculate z. If y 0 power(x, y) if y0 if y1 1x power(r, y1) if y 1,Write a recursive function, power, that takes as parameters two integers and y such that z is nonzero and returns .

Write a program in Assembly language using MIPS instruction set that reads investment amount of a person in a company and calculate the amount of profit that he will gain from the company at the end of the year. The company usually declares the profit rate at the end of year based on the investment amount as follows Investment Amount 800000

3. Write a MATLAB Program to do the following (a) Generate a 10 x 10 matrix using the magic function in MATLAB (b) Obtain the sum of numbers on the right diagonal and set it as a (e) Obtain the sum of numbers on the left diagonal and set it as b (d) Compute the difference c a b. (e) Show all necessary data,3. Write a MATLAB Program to do the

Draw the state transition diagram for the Logisim circuit below. Show your working out. Marks will be awarded for your working out. You must include The Boolean algebra expressions for J and K for both flipflops i) The state transition table iii) The state transition diagram with edges labelled W woo 00 01 CLK O QO 4

3. Write a MATLAB Program to do the following (a) Generate a 10 x 10 matrix using the magic function in MATLAB (b) Obtain the sum of numbers on the right diagonal and set it as a (c) Obtain the sum of numbers on the left diagonal and set it as b (d) Compute the difference c a b. (e) Show all necessary data

(c) Write a Python function that takes a list of tuples, where each tuple contains the name of a student and their final exam score. The function should return a tuple containing the name of the student with the highest score and the highest score itself. If there are multiple students with the highest score, the function should return the name of

a) What is the difference between a jump instruction, a conditional jump instruction and an instruction of subroutine and an interrupt of software b) When a element of a procesor is arquitectural c) Which characteristics distinguish the RISC contemporary architectures d) Which function has the operation modes of a processor e) Identify which of

Slatency (s) where Here is the definition of Amdahls law. 1 (1 p) f Slatency is the theoretical speedup of the execution of the whole task. s is the speedup of the part of the task that benefits from improved system resources. p is the proportion of the execution time that the part benefiting from improved resources originally occupied. Consider

16 The IEEE double precision floating point number system uses t 53 digits base 3 2 arithmetic with exponent bounds 1021 e 1024. So Emachine 1.11 107 m 2.23 10308, M 1.79 10308. Let , , and be the operations of floating point addition, subtraction, multiplication and division, respectively. (a) What is the smallest positive floating point

Given the relations shown below, show the results of the following relational operations S S 1 S2 S3 S4 S5 city Paris Berne Oslo .null. Paris P P P1 P2 P3 P4 P5 city Paris Berne Rome .null. .null. J J City J1 Paris J2 Rome J3 Oslo J4 .null. J5 Rome 1. The projection of S on city (1pt.) 2. The union of result from step (1) and the projection of P

Write a console application that asks the user to enter a string of characters. Then, in a do loop, use Console. Read() to read each character from the input stream and then describe that character (see Details below). End the loop when the '' character is encountered. Details: Display the ascii code (the integer value of the character) Display

Consider the following ERDiagram Construct a relational database schema corresponding to the ERdiagram and specify primary keys and foreign keys. For each foreign key, specify the referenced table. Al A2 r1 r2 A1

1. Write a program that prompts the user to enter four numbers between 1 and 13 and tests whether these four numbers can form an expression that yields 24. The expression can use the operators (addition, subtraction, multiplication, and division) and parentheses in any combination. Each number must be used once and only once. Here is a sample run

a. Draw a recursion tree for the recurrence T(n) T(an) ((1a)n) cn, where 0 a 1 and c 0 are constants. Draw the nodes at three depths, i.e., level 0, 1, and 2 (root node is depth 0). Show the cost of each level. b. Assume that the procedure FUN(n) has a running time of 0 (n), and we have designed an algorithm as follows SOMEALGO(n) 1. i1 2.

3) Write a C program that outputs a table having four columns of temperature values, ordered as follow Celsius, Fahrenheit, Kelvin and Rankine. Use a while loop. Let the Celsius temperature vary from 0.0 to 100.0 in steps of 5 C. Convert each of these values to the other scales using the formulas given in Lab1. (reproduced here for your

For this section, if you cannot answer a question with a specific number or value, describe the answer in words. (a) How do you determine the length of the clock cycle in the single cycle datapath (Be specific) (b) How do you determine the execution time for a program run on the multicycle datapath (Be specific) (c) How many different addresses

selected as the last element and array A23,7,14,1,5,1. Below is the PARTITION(4, p. r) pseudocode where pivot is always a. Illustrate the PARTITION(A, p.) module operation like below when call it with the above array A. Show clearly the position of and j in each picture. PARTITION(A. p, r) 1. x Ar 2. i p1 3. 4. 5. 6. forjp to r 1 if Aj x ii1

tilt 5V. Figure8 R1 22 . R2 22 LOAD R3 5 Luf V V,tilt 5V. Figure8 R1 22 . R2 22 LOAD R3 5 Luf V V,Explain the change in Figure 8 when the value of the load resistance changes according to the 2nd and 7th digits of your student ID (student ID 64210054, R1 45kQ),Explain the change in Figure 8 when the value of the load resistance changes

Consider the following Boolean faction F1 (ab ac) bc a) (10 points) Construct the (detailed) truth table of the function F1. b) (20 points) Using the truth table generated in (a), express the function F1 in the canonical sum of minterms form. c) (30 points) Express the function F1 in a standard SumofProducts (SOP) form.

Let X represent the weight of a randomly selected student in Davis. Lets also suppose that the weight is distributed with a Poisson distribution with mean 50kg. a.) In a sample of 20 randomly selected students, what is the approximate probability that the sample mean is larger 70kg. b.) If you have an elevator that can hold 500kgs what is the

list 01 18 A 32 23 17 16 43 B 87 25 17 44,a. What is the output of listinfo if it is printed b. What is the output of Ainfo if it is printed c. What is the output of Blinkinfo if it is printed d. Write C statements to make A point to the node containing info 23. e. Write C statements to make B point to the last node in the list. f. Write C

using the following partially defined intArrayList class class intArrayList { public: intArrayList& operator=(const intArrayList &); bool isEmpty()const; bool isFull()const; int listSize()const; int maxListSize()const; void print()const; void clearList(); int seqSearch(const int &item)const; void insert(const int &insertItem); void remove(const

The following noisy data are given k Yk 1 23 4 2.00 0.250 0.900 1.00 2.23 4.29 5.12 6.30 Write a Python script names least squares.py that 1. Sets up the linear system for the coefficients of the linear leastsquares interpolant and solves it. 2. Computes and prints the corresponding leastsquares error. 3. Produces a plot with the data in the table

Show the AVL tree T after the insertion of the following element in that order(use dummy entry at external nodes) 2, 1, 4, 5, 9, 3, 6, 7. a) Show the tree after each insertion, and before and after each rotation whenever rotation is needed. Whenever a rebalancing operation is performed, identify the relevant nodes (x, y, z) and subtrees (T1, T2,

4. Suppose we have a signal f(t) on 0,1 which is bandlimited in that it only has N 2B 1 Fourier series coefficients which are nonzero f(t) for some set of expansion coefficients a B akelankt kB aB X 00 ECN aB We observe M samples of f(t) at locations t, t2,..., to which are not necessarily uniformly spaced, ym f(tm), m 1,...,M. Write a MATLAB

Convert each of the following into a CNF (some may be trivial) (pq)(rs) (pq)(rs) (pq)(rs) (pq)(rs) ((pq)r) ,Convert each of the following into a CNF (some may be trivial) (pq)(rs) (pq)(rs) (pq)(rs) (pq)(rs) ((pq)r)

Write a C function which calculates the following series In 2.5xn1 1.2xn2 1.5 The function should return a float value for xn and takes no argument (ie the argument is of type void). The function should assume that x0 0 and x1 0. On the first call to the function x2 is returned. On the second call x3 is returned, etc. The function prototype is

(a) (i) Name the FOUR major components of an information system. (2 marks) (ii) Identify an information system being used in HKCC and describe its features in relation to the components you specified in part (i). (8 marks) (b) Business Intelligence (BI) provides THREE different views of operations and environments of an organization. Give examples

Why do software engineers use named constants like JOptionPane.YESNOOPTION A. Because of dynamic binding. B. To make Java code as selfdocumenting as possible. C. Because the Java compiler requires the use of named constants. D. Because the Java runtime system requires the use of named constants. E. They have to be used for methods that require a

X obogbog D CLK QO Write the excitation equations for the following state machine CLK D CLK Q D CLK Q Q1 Q2 Q3

1. Write a Calculator class which contains methods that accepts two integers as arguments and return the results of Addition() and Subtraction() methods. 2. Extend the Calculator class to include the Division() and Multiplication () methods which are included in Advancedcalculator class. 3. Call these methods though main() and print the results.

What is the output public static void main(String args) String str first second for(int i str.length() 4 i 0 i) if (i (str.length() 1) 4) break System.out.print(str.charAt(i)) ,What is the output public static void main(String args) String str first second for(int i str.length() 4 i 0 i) if (i (str.length() 1) 4) break

2. Consider the grammar given below , ( ) a. b. C. d. a b c What are the Variables What are the terminal symbols What is the start symbol Draw a parse tree for the statement (a), b, c

Write a program to accept a weekday and a time (composed of hour and minute) in 24hour format. The user further inputs a number of minutes to be added to (or subtracted from) the time. Then it outputs the resulted day and time in 2digit 24hour format. 3rd digit of your student ID Odd Even Number of minutes to be ... Added Subtracted User inputs 1.

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