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1. The syntax for any linux command is a) command [options][argummets] b) command options[argummets] c) command arguments[options] d) command [arguments][options] 2. Computer security seeks to prevent ________ or ________ of data while ________? 3. What is the core of the linux operating system called? 4. Which of the following is not available as a cloud service a) PaaS b) application as a service c) Mobility as a service d) Infrastucture as a service 5.__________ shows what happened in an incident, analysis can guide the prevention of future sucessfull attacks? 6. Which of the following is one of the OAuth role? a)Client b) certificate authority c)directory object d) policy server Solution 1. $command [options][arguments] 2. Computer security seeks to prevent entering or leaving of data while firewalls are set. 3 Kernel is core of Linux OS. 4. Application as a service is not available as clod service 5 Incident data report shows what happened in an incident. 6 Certificate Authority will have Auth role. .

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Describe briefly the OSI Reference model and its relevance to computer security. [4 Marks] • Ans 1: The Open System Interconnection Model (OSI) is a standardized framework for describing how computers communicate with each other over a network system. The OSI model also conceptualizes how data flows through a stack of seven layers, beginning with the physical layer and continuing through the datalink, network, transport, session, presentation, and finally the application layer (Simoneau, 2006)

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3 to 4 line answers only each. No Plagarism. $25 Need by 10/9/2016 - 10:00 AM 1. Distinguish between vulnerability, threat, and control. 2. Theft usually results in some kind of harm. For example, if someone steals your car, you may suffer financial loss, inconvenience (by losing your mode of transportation), and emotional upset (because of invasion of your personal property and space). List three kinds of harm a company might experience from theft of computer equipment. 3. List at least three kinds of harm a company could experience from electronic espionage or unauthorized viewing of confidential company materials. 4. List at least three kinds of damage a company could suffer when the integrity of a program or company data is compromised. 5. List at least three kinds of harm a company could encounter from loss of service, that is, failure of availability. List the product or capability to which access is lost, and explain how this loss hurts the company. 6. Describe each of the following four kinds of access control mechanisms in terms of (a) ease of determining authorized access during execution, (b) ease of adding access for a new subject, (c) ease of deleting access by a subject, and (d) ease of creating a new object to which all subjects by default have access. • per-subject access control list (that is, one list for each subject tells all the objects to which that subject has access) • per-object access control list (that is, one list for each object tells all the subjects who have access to that object) • access control matrix • capability 7. Suppose a per-subject access control list is used. Deleting an object in such a system is inconvenient because all changes must be made to the control lists of all subjects who did have access to the object. Suggest an alternative, less costly means of handling deletion. 8. File access control relates largely to the secrecy dimension of security. What is the relationship between an access control matrix and the integrity of the objects to which access is being controlled? 9. One feature of a capability-based protection system is the ability of one process to transfer a copy of a capability to another process. Describe a situation in which one process should be able to transfer a capability to another. 10. Suggest an efficient scheme for maintaining a per-user protection scheme. That is, the system maintains one directory per user, and that directory lists all the objects to which the user is allowed access. Your design should address the needs of a system with 1000 users, of whom no more than 20 are active at any time. Each user has an average of 200 permitted objects; there are 50,000 total objects in the system. 11. Give an example of the use of physical separation for security in a computing environment. 12. Give an example of the use of temporal separation for security in a computing environment. 13. Give an example of an object whose sensitivity may change during ex.

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Dynamic binary analysis tools utilize a combination of techniques that include fuzzing, symbolic execution, and concolic execution to discover exploitable code in sophisticated binaries. Much work has been dedicated to developing automated analysis tools to target mainstream processor architectures (e.g. x86 and x86_64. ). An often overlooked and inadequately addressed area is the development of tools that target embedded systems processors that include PowerPC, MIPS, and SuperH. Historically, a challenge with targeting multiple embedded architectures was that it was often necessary to write an analysis tool for each architecture. In this talk, we'll discuss an approach for decoupling the architecture specifics from the analysis by utilizing intermediate representation (IR) languages. Intermediate representation languages provide a method to abstract out machine specifics in order to aid in the analysis of computer programs. In particular, the LLVM IR language provides an extensive set of analysis and optimization libraries, along with a JIT engine, that can be collectively utilized to develop architecture-independent automated analysis and exploitation tools.

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Oracle is one of the largest vendors and the best DBMS solution of Object Relational DBMS in the IT world. Oracle Database is one of the three market-leading database technologies, along with Microsoft SQL Server's Database and IBM's DB2. Hence in this paper, we have tried to answer the million-dollar question “What is user’s responsibility to harden the oracle database for its security?” This paper gives practical guidelines for hardening the oracle database, so that attacker will be prevented to get access into the database. The practical lookout for protecting TNS, Accessing Remote Server and Prevention, Accessing Files on Remote Server, Fetching Environment Variables, Privileges and Authorizations, Access Control, writing security policy, Database Encryption, Oracle Data Mask, Standard built in Auditing and Fine Grained Auditing (FGA) is illustrated with SQL syntax and executed with suitable real life examples and its output is tested and verified. This structured method acts as Data Invictus wall for the attacker and protect user’s database.

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The cloud storage offers users with infrastructure flexibility, faster deployment of applications and data, cost control, adaptation of cloud resources to real needs, improved productivity, etc. Inspite of these advantageous factors, there are several deterrents to the widespread adoption of cloud computing remain. Among them, security towards the correctness of the outsourced data and issues of privacy lead a major role. In order to avoid security risk for the outsourced data, we propose the dynamic audit services that enables integrity verification of untrusted and outsourced storages. An interactive proof system (IPS) with the zero knowledge property is introduced to provide public auditability without downloading raw data and protect privacy of the data. In the proposed system data owner stores the large number of data in cloud after e encrypting the data with private key and also send public key to third party auditor (TPA) for auditing purpose. TPA in clouds and it’s maintained by CSP. An Authorized Application (AA), which holds a data owners secret key (sk) and manipulate the outsourced data and update the associated IHT stored in TPA. Finally Cloud users access the services through the AA. Our system also provides secure auditing while the data owner outsourcing the data in the cloud. And after performing auditing operations, security solutions are enhanced for the purpose of detecting malicious users with the help of Certificate Authority

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Talk by Oksana Safronova at NoNameCon 2019. https://nonamecon.org https://cfp.nonamecon.org/nnc2019/talk/AXCDXU/ Before the real incident happens, security team must test their detection capabilities in different ways. An overview of MITRE ATT&CK Matrix, test environments and other friends of Blue Team. Obstacles, unexpected discoveries, lack of information, a flood of logs, new technologies - you will meet them all if you want to build an effective defense team. The talk will expend the next topics based on the experience we have: How to test the security team's detection and incident response processes Best practices for endpoint monitoring tools configuration Some problems, that defense team can encounter Additional resources that can help you detect threats

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Factors Affecting the System Safety • Hazard Analysis • Requirements and Specification • System Reliability and Safety • Design • Testing & Debugging • Safety Integrity and Risk assessment • Documentation Follow : Zain Abid Main Channel : http://bit.ly/ZainAbid736 Facebook : https://facebook.com/zaiinabid736 Instagram : https://instagram.com/zainabid736 Twitter : https://twitter.com/zainabid736 SnapChat : https://snapchat.com/add/zainabid736

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Storage of user or application-generated user-specific private, confidential data on a third party storage provider comes with its own set of challenges. Although such data is usually encrypted while in transit, securely storing such data at rest presents unique security challenges. The first challenge is the generation of encryption keys to implement the desired threat containment. The second challenge is secure storage and management of these keys. This can be accomplished in several ways. A naive approach can be to trust the boundaries of a secure network and store the keys within these bounds in plain text. A more sophisticated method can be devised to calculate or infer the encryption key without explicitly storing it. This paper focuses on the latter approach. Additionally, the paper also describes the implementation of a system that in addition to exposing a set of REST APIs for secure CRUD operations also provides a means for sharing the data among specific users.

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A star is 17.2 ly (light-years) from Earth. HINT (a) At what constant speed (in m/s) must a spacecraft travel on its journey to the star so that the Earth-star distance measured by an astronaut onboard the spacecraft is 4.06 ly? X m/s (b) What is the journey\'s travel time in years as measured by a person on Earth? yr (c) What is the journey\'s travel time in years as measured by the astronaut? yr Solution a)let Lo = 17.2 ly L = 4.6 ly let v is the speed of the spacecraft L = Lo*sqrt(1 - (v/c)^2) L/Lo = sqrt(1 - (v/c)^2 (L/Lo)^2 = 1 - (v/c)^2 (v/c)^2 = 1 - (L/Lo)^2 v = c*sqrt(1 - (L/Lo)^2) = 3*10^8*sqrt(1 - (4.05/17.2)^2) = 2.92*10^8 m/s b) T = Lo/v = 17.2*3*10^8/(2.92*10^8) = 17.67 years c) To = 4.06*3*10^8/(2.92*10^8) years = 4.17 years .

A star is 17-2 ly (light-years) from Earth- HINT (a) At what constant.docx

tjames442

A true statement about atoms is that they can emit radiation at frequencies only within the visible spectrum. can emit radiation only at specific frequencies. all have the same number of electrons. can emit radiation at any frequency. Solution Solution) option(D) Can emit radiation at any frequency The frequencies of light that an atom depends on states that an electron can be in.when electron is excited it moves to higher energy level.when electron falls back to ground level then light is emitted. .

A true statement about atoms is that they can emit radiation at freque.docx

tjames442

A TDR price of a length of 60 centimeters was installed vertically into a soil profile before seeding wheat in the spring. The growing season precipitation was 30 cm. TDR reading on May 15th was L0=2.900 meters; L1=5.114 m. On the day of harvesting (September 8th), the reading was L0=2.900 m and L1=4.331 m. Assuming there were negligible drainage and runoff during the crop growing period, what war the average evapotranspiration rate firing the growing season? If the wheat yield was 2000 kg/hectare, what was the crop water use, and crop water use efficiency? (L0 is the initial peak reading and L1 is the end of valley reading from the TDR screen). Solution total use of water = 5.114 - 4.331 + 0.3=1.083 m = 108.3 cm depth in 115 days avg evapotranspiration = 108.3/115= 0.939 cm/day crop water use = 1.083*10 4 m 3 /hectare = 1.083 *10 7 kg /hectare efficiency = 2000/( 1.083 *10 7 ) = 1.093 *10 -4 .

A TDR price of a length of 60 centimeters was installed vertically int.docx

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1. The real interest rate is defined as: A. inflation minus the nominal interest rate. B. the nominal interest rate plus inflation. C. the nominal interest rate divided by inflation. D. the nominal interest rate minus inflation. 2. The loanable funds theory states that ________ is(are) determined by the ________ for loans. A. real interest rates; demand B. nominal interest rates; supply and demand C. real interest rates; supply and demand D. inflation; supply 3. In the loanable funds theory, ________ is the ________ of a loan. A. the nominal interest rate; price B. inflation; cost C. the price; interest rate D. the real interest rate; price 4. Which of the following are assumptions of the loanable funds theory? I. There is only one type of loan. II. The interest rate is zero. III. Banks are the intermediary between savers and investors. A. I only B. II only C. III only D. I and III 5. Which of the following are assumptions of the loanable funds theory? I. There are many types of loans. II. There is only one interest rate. III. Savers loan to investors via banks. A. I only B. II only C. III only D. I and III Solution 1) A 2) A 3) C 4) D 5) D .

1- The real interest rate is defined as- A- inflation minus the nomina.docx

tjames442

1. The intNumbers array is a one dimensional array. Write the statement to multiply the number stored in the first array element by 3. 2. The intNumbers array is a one dimensional array. Write the statement to add together the numbers stored in the first and second array elements, display the sum in the lblSum control. ( visual basic ) Solution 1. The intNumbers array is a one dimensional array. Write the statement to multiply the number stored in the first array element by 3. statement: Dim IntNumbers() As Integers={12,16,20,24,28} IntNumbers(0)=IntNumbers(0)*3 2. The intNumbers array is a one dimensional array. Write the statement to add together the numbers stored in the first and second array elements, display the sum in the lblSum control. statement: Dim IntNumbers() As Integers={12,16,20,24,28} Dim NewElement As Integer NewElement=IntNumber(0)+IntNumber(1) lblSum.Text=Cstr(NewElement) .

1- The intNumbers array is a one dimensional array- Write the statemen.docx

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1- The following data were reported by a corporation: Authorized shares 20,000 Issued shares 15,000 Treasury shares 3,000 ______________What is the number of outstanding shares? 2- Purchasing 500 shares of treasury stock would be A. An asset source B. An asset use C. An asset exchange D. A claims exchange Solution 1. The number of outstanding shares = 15,000 - 3,000 = 12,000 shares 2. This is an Asset use transaction since it decrease cash and decrease paid up capital. .

1- The following data were reported by a corporation- Authorized share.docx

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1. The following change is physical or chemical. Explain why? Water boils in a kettle 2 Balance the following reaction. C3 H6+ 02 CO2+ H20 3. Distinguish between the two terms. Provide an example for each of them. Solute and solvent 4. The following solution is an acidic or basic? Why? Soap (PEH-8) 5. Write the following chemical formulas: a. sodium chloride b. calcium nitrate 6. Draw a Condensed structural diagram for the following compound. 2-pentene 7.. Calculate the molar mass for this compound Fe 203 8. 3. Sodiun Floride is added to toothpaste and tap water to belp prevent tooth decay. Calculate the mass of2.00 mol of sodium loride. Na F(s). Solution 1. Boiling of water in a kettle is physical change since there is no change in composition(H2O) and it is reversible. 2. C3H6 + 9/2 O2 - - - - - - >3 CO2 + 3 H2O 3. Solute is the one which is in minor quantity and soluble in excess of solvent while solvent is the one which dissolves the solute and is in excess. 4. Basic since pH is greater than 7 PH =7 - neutral, <7-acidic, >7- basic 5. Sodium Chloride - NaCl, Calcium Nitrate - Ca(NO3)2 6.CH3CH=CHCH2CH3 7. Fe2O3 =2x56+3x16=112+48=160 (approximately) 8. Mass = Moles x molar mass of NaF = 2x42 = 84 g .

1- The following change is physical or chemical- Explain why- Water bo.docx

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1- Which of the following is a situation in which an involuntary trans.docx

tjames442

1. Which of the following is NOT a function of a firewall? a. Blocks or forwards packets based on source and destination address and TCP port b. Blocks or forwards packets based on source and destination address and UDP port c. Examines packet data for worms, viruses, malware, etc. and blocks a stream if it contains malicious content d. Converts Ethernet packets to Token Ring or ARCnet packets e. Allows a computer inside the firewall to initiate a TCP connection to an outbound system, and then transmit data to and from that system, while preventing an outbound system from initiating a TCP connection to an internal host. Solution The correct option is d. Converts Ethernet packets to Token Ring or ARCnet packets Since Ethernet is one network and another is token ring then to communicate between these two work stattions is possible by using bridge or gateway. Ethernet with a speed of 100Mbps and Token ring with a speed of 10Mbps. Here firewall has done nothing to work to get it working between two different networks. The firewall is either software program or hardware like Router which monitors the incoming packets for malicious code or virus or worms to infect the computer.The firewall examines packet data for unauthorized access to get control over the computer system. .

1- Which of the following is NOT a function of a firewall- a- Blocks o.docx

tjames442

1. What soil characteristics influence compressibility 2. Why is consolidation a time-dependent process? Solution the following are the charecteristics of soil which influence compressibility they are 1. expulsion of pore air from void spaces which leads to reduce in its void ration and soil gets compressed 2. expulsion of pore water from the void spaces of the soil mass 3. a soil mass with honey comb structure is more compresible than soil have dense structure 4. a soil which is composed of flat grains in its structure is more compressible than one with spherical grains 5. a soil in remoulded state is more compressible than same soil in its natural state. 2)answer: consolidation is time dependent why beacuse the effective void ratio ( not void ratio ) is less so the water present in the pore spaces is unable to expulse fastly. and the water which is present around the soil grain called adsorbed water drags the pore water and slow doen the process of expulsion of water.. so consolidation leads lot of time and sustained loads .

1- What soil characteristics influence compressibility 2- Why is conso.docx

tjames442

1- What type of encryption does PKI use? Symmetric Asymmetric DES AES 2- The upper layers of the OSI model are, in correct order. Session, application, presentation Session, presentation, application Session, application, presentation, physical Application, presentation, session, physical Solution 1. Public Key Infrastructure (PKI) uses asymmetric key encryption between parties. Asymmetric Encryption : It is a form of Encryption , in this pair of keys are coming. Here one key encrypts, while the other key can decrypt. Option b is correct choice. 2. The upper layers of the OSI model are, in correct order is 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical These are the Layers in OSI model. Option d is correct choice. .

1- What type of encryption does PKI use- Symmetric Asymmetric DES AES.docx

tjames442

1. What kind of contract did Lulene and Ellen have? What kinds of issues may arise with their contract? 2. Suppose the Mississippi legislature passes a law, one day after Lulene and Ellen make their contract, that the sale of lemon pies is prohibited in the state because lemons have been found to cause cancer. How would that affect the contract? 3. Assume that when Lulene and Ellen entered into the agreement Ellen was an enterprising 16-year-old. Would the contract be enforceable? Why or why not? 4. Instead of meeting to discuss the deal, Lulene had sent Ellen a letter offering to sell her lemon pies for $5.00 per pie for as long as Ellen likes. Lulene says she must receive Ellen Solution Instead of meeting to discuss the deal, Lulene had sent Ellen a letter offering to sell her lemon pies for $5.00 per pie for as long as Ellen likes. Lulene says she must receive Ellen\'s answer by May 10. On May 8 Ellen signs a letter accepting the offer and mails it. On May 9 Lulene calls to withdraw her offer. Ellen says it\'s too late, she has accepted. Who wins? Ellen wins, because it was effective when sent. Assume that Ellen doesn\'t call the deal off when she is told the price is now $7.00, but wants to hold Lulene to the deal to supply pies at $5.00. If Lulene fails to supply the pies, and if Ellen then sues her for a breach of contract, what is Lulene most likely to argue to avoid liability? Lulene is most likely to argue with impossibility. .

1- What kind of contract did Lulene and Ellen have- What kinds of issu.docx

tjames442

1. what is the net ionic equation for the neutralization of HBr with KOH 2. what is the net ionic equation for the neutralization of HF with KOH Solution Solution:- (1) HBr is a strong acid and KOH is a strong base. Both are like completely dissociated and also KBr is water soluble. The molecular equation is... HBr(aq) + KOH(aq) -----> KBr(aq) + H 2 O(l) Ionic equation is..... H + (aq) + Br - (aq) + K + (aq) + OH - (aq) ----> K + (aq) + Br - (aq) + H 2 O(l) Here, K + and Br - are the common ions so they are canceled out while write the net ionic equation. The net ionic equation is... H + (aq) + OH - (aq) -----> H 2 O(l) (2) HF is a weak acid and so it is not completely dissociated. For the ionic equations we don\'t show the dissociation of weak acid or base. HF(aq) + KOH(aq) -----> KF(aq) + H 2 O(l) Ionic equation is... HF(aq) + K + (aq) + OH - (aq) ----> K + (aq) + F - (aq) + H 2 O(l) K + is the common ion. The net ionic equation would be... HF(aq) + OH - (aq) ----> F - (aq) + H 2 O(l) .

1- what is the net ionic equation for the neutralization of HBr with K.docx

tjames442

1. What is outsourcing? What are advantages and disadvantages of outsourcing? 2. Define Social Media Information System (SMIS)? List some of the individual and organizational risks associated with use of social media and how they can be prevented. 3. Describe business intelligence application and give at least two examples Solution 1. Some companies source their materials or work processes from outsider firms, this process is known as outsourcing . Competitive advantages of outsourcing are listed below: Despite of the above advantages, outsourcing involves the following risks: Thus, it can be concluded that a company should analyze the outcomes of outsourcing strategy, before its implementation. 2. Social media information system (SMIS) utilizes the social media channels to share some news and information with the network of users. Risks associated with social media information system are listed below: Organizations can prevent these risks with the help of given strategies: 3. Business intelligence application includes those applications that help an organization in collecting, analyzing and disseminating the data for effective decision making process. Examples of business intelligence application are given below: .

1- What is outsourcing- What are advantages and disadvantages of outso.docx

tjames442

1. What is the difference between OSI and TCP/IP layered models? Solution 1. OSI which stands for Open Systems Interconnection is a conceptual model which define standards on how two systems can communicate on a network. TCP/IP which stands forÂ Â Transmission Control Protocol(TCP) and the Internet Protocol (IP) is protocol suite which defines different protocols for communication between two systems on the internet. 3. OSI model has 7 layers which include Application Layer Presentation Layer Session Layer Transport Layer Network Layer Data Link Later Physical Layer 3. TCP.IP has 4 layers Application Layer Transport Layer Internet Layer Link Layer or .

1- What is the difference between OSI and TCP-IP layered models-Soluti.docx

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1. What is a database? Give some examples. 2. What is a database management system? Give some examples 3. How a database is structured? What is a primary key? 4. An application runs on specific operating system that stores and retrieves data on a database yo produce information. Explain with a diagram. 5. Explain the basic database applications in CRUD. Solution 1) Database : Its basically collection of information or say data which we want to store so that we can access or update it as and when required. Like storing data about employee in an organisation 2) Database Management System : The system which handles database. It provides user/programmers a systematic way of storing , accessing, retrieving and managing data. Eg : Oracle 3) Database is structured in form of tables which stores relevanty data like employee table wich can have colums to store employee name, address, contact details , salary etc. Primary key : its the attribute to uniquely identify a row and for eg in Employee table uniquely identify a employee. 5) CRUD : basically the four major operations in database to handle the data C: Create , the operation to create table/store data in table R : Retrieve - the operation to access the stored data U : Update : the operation to update the already stored data D : Delete : the operation to delete the stored data .

1- What is a database- Give some examples- 2- What is a database manag.docx

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1. What are the functional sources of power? 2. Distinguish between personal and social power? What are the 4 power-oriented characteristics of the best managers Solution Making organizations more innovative, responsive and responsible requires focusing on a number of leadership, power and influence issues. These issues are critical in coping with the strategic environment with all its VUCA characteristics, and strategic leader performance requirements in that environment. The issues influence developing teams at the strategic level, as well as managing organizational processes linked to values and ethics, organizational culture, visioning and the management of change. Such issues include: RECENT DEVELOPMENTS Although trait, behavioral, and contingency approaches have each contributed to the understanding of leadership, none of the approaches have provided a completely satisfactory explanation of leadership and leadership effectiveness. Since the 1970s, several alternative theoretical frameworks for the study of leadership have been advanced. Among the more important of these are leader-member exchange theory, transformational leadership theory, the substitutes for leadership approach, and the philosophy of servant leadership. .

1- What are the functional sources of power- 2- Distinguish between pe.docx

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1. What are phonons? What information can be obtained by studying the phonon spectrum of solids? Solution A phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, like solids and some liquids. It is a quantized mode of vibration occurring in a rigid crystal lattice, such as the atomic lattice of a solid. Solids with one or more atoms exhibit two types of phonons. They are (1) acoustic phonons and (2) optical phonons. When a solid absorbs energy, the number of phonons changes. Macroscopic properties like thermal energy can be described by suitable statistical models. If a solid is viewed as a collection of distinguishable oscillating atoms, they would obey Maxwell-Boltzmann distribution. Since phonons are indistinguishable particles like photons, they follow Bose-Einstein distribution. There is no limit on the number of particles a boson state can occupy. In solid-state physics, the study of phonons is important because phonons play an important role in many of the physical properties of solids, such as the specific heat, melting point, thermal conductivity, the electrical conductivity, and superconductivity.Â Â The electrons are responsible for the majority of heat conduction in metal, while the phonons are the dominant carriers in the semiconductors and insulators, e.g. silicon, germanium and silica-based materials. In some cases, the phonon contribution to the specific heat or resistivity can be easily separated from other contributions and can provide important information about the lattice dynamical properties of a solid. There are studies made on the measurements of sound velocities using spectroscopic techniques which is quite useful since they provide the slopes of the acoustic phonon branches. .

1- What are phonons- What information can be obtained by studying the.docx

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1. void fun(int &j) { j++; } int main() { int i = 20; fun(i); printf(\"i = %d\ \", i); return 0; } 2. void fun(int *j) { (*j)++; } int main() { int i = 20; int *p = &i; fun(p); printf(\"i = %d\ \", i); return 0; } 3. #include<stdio.h> void square(int); main() { int num = 3; square(num); printf(â€œnum: %d\ â€, num); } void square (int num) { num = num * num; } 4. #include<stdio.h> int square(int); main() { int num = 3; square(num); printf(â€œnum: %d\ â€, num); num = square(num); printf(â€œnum: %d\ â€, num); } int square (int num) { num = num * num; return num; } Solution 1))))))))))))) the address of i is passed in the fuinction in this case then in the function the address is incremented and print in the main block 2))))))))))))))) p is a pointer as a pointer it stores the address of another variable here p stores the address of variable i rather than the value of a variable 3)))))))))))))) function with arguement and no return type the fun ction here declared as void so it doesnot return the value 4)))))))))) function with arguement and return type it returns the value to the called function. .

1- void fun(int &j) { j++- } int main() { int i - 20- fun(i)- printf(-.docx

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1. Single convex lenses can be used to make images of far away objects. Will these images be real or imaginary? Where does the image occur relative to the focus? (Specify which side of the lens) 2. Lenses in combination are used in the making of microscopes and telescopes. When observing with the human eye, should the device create real or virtual images? Why? 3. Microscopes often have very bright lights to illuminate the object. If you were to look at the light without the microscope it appears so bright it may \"hurt\" to look at it. If the microscope magnifies the object to create a larger image, why is it safe to look through microscope at the very bright object? (This is the same concept as why projector bulbs are very bright.) Please explain in detail, not just with a one sentence answer for each and I will rate. Thank you! Solution 1) The image will be real because it is formed by the actual meeting of the rays converging. The image is formed at the focal point behind the lens, i.e. on the other side of the lens. This is when the rays coming from the distant object are parallel to the principal axis. Otherwise the image is formed on a line perpendicular and passing through the focal point. 2) When observing with the human eye, the device should create virtual image. The reason is that when we view an image we want the image to be clear and upright and not inverted. An upright image is formed only when it is virtual. 3) When we look directly, we view it with its original intensity; therefore it may hurt our eyes. On the other hand when viewing through the microscope the light is reflected a few times and so its intensity decreases, thereby making it safe to view at. .

1- Single convex lenses can be used to make images of far away objects.docx

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