Master Computers and Technology with Fun Quizzes & Brain Teasers!

You discover a binary star system in which one star is a 15 MSun main-sequence star and the other is a 10 MSun giant. How do we think that a star system such as this might have come to exist
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Suppose your company's website only allows passwords with lower-case letters (no upper-case letters, no numbers, no special characters) that are exactly of length 12. Now your company wants to increase the security by making the password harder to guess. Your boss asks to increase the password length by 3 letters. You suggest keeping the length as it is but allowing upper-case letters in addition to lower-case letters. By what factor does your proposal increase the number of possibilities compared to your boss' proposal (i.e., what is the ratio of possibilities under your proposal divided by the possibilities under your boss' proposal)
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Write a function prime() that returns 1 if its argument is a prime number and returns 0 otherwise
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Keyframe animation lets you transform objects or skeletons over _________________ by setting keyframes.
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) Explain in your own words why this is true, and give an example that shows why the sequence space cannot be smaller. Specifically, for your example, consider a window size of 4. In this case, we need at least 8 valid sequence numbers (e.g. 0-7). Give a specific scenario that shows where we could encounter a problem if the sequence space was less than 8 (i.e. Give a case where having only 7 valid sequence numbers does not work. Explain what messages and acks are sent and received; it may be helpful to draw sender and receiver windows).
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The uplink/downlink component used on trucks equipped with satellite communications technology is often called
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If you want the user to visually control the value of a number by sliding a form control, what control could you use
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Assume the maximum segment size used by the TCP connection is 1000 bytes. Answer the following question.How many bytes would be the congestion window after it sends out 2 segments and receives acks for all of them if the connection is in slow-start and MSS is 1000 bytes.
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Consider a point-to-point link 10 km in length. At what bandwidth would propagation delay (at the speed of 2108m/s) equal transmit delay for 125-byte packets? What about 640-byte packets?
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A student has created a Car class. The class contains variables to represent the following:A String variable called color to represent the color of the carAn int variable called year to represent the year the car was madeA String variable called make to represent the manufacturer of the carA String variable called model to represent the model of the carThe object vehicle will be declared as type Car.Which of the following descriptions is accurate?i. An instance of the vehicle class is Car.ii. An instance of the Car object is vehicle.iii. An attribute of the year object is int.iv. An attribute of the vehicle object is color.v. An attribute of the Car instance is vehicle.
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You have modified an OpenSSH service's configuration file, /etc/ssh/ssh_config. The service is already running. What is the best command to use with systemctl to make this modified file take immediate effect
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The not operator expects a single operand and returns its logical negation, True, if it's false, and False if it's true. True False
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A Layer 3 switch has been configured to route IP packets between VLANs 1, 2, and 3 using SVIs, which connect to subnets 172.20.1.0/25, 172.20.2.0/25, and 172.20.3.0/25, respectively. The engineer issues a show ip route connected command on the Layer 3 switch, listing the connected routes. Which of the following answers lists a piece of information that should be in at least one of the routes?a. Interface Gigabit Ethernet 0/0.3.b. Next-hop router 172.20.2.1.c. Interface VLAN 2.d. Mask 255.255.255.0.
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Having only a single possible path between devices ________. Group of answer choices reduces errors reduces switching cost provides reliability none of the above.
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You are in charge of installing a remote access solution for your network. You decide you need a total of four remote access servers to service all remote clients. Because remote clients might connect to any of the four servers, you decide that each remote access server must enforce the exact same policies. You anticipate that the policies will change frequently. What should you do?
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We define the cpu efficiency of a computer system as the percentage of cpu time used for useful work. The scheduling method used is round robin with a time quantum of Q, if on the average, every process will use 2*Q cpu time before it will block on I/O operation for 4*Q time (I/O completion time) and we assume the context switch cost is Q and there are infinite amount of processes in the system, then the cpu efficiency of this system is:
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A ____ includes information technology that operates within a radius of approximately 10 meters of an individual and is centered around that one person.
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True or False: One or more HDX cards can be added to a Pro Tools|HD Native system to increase track count, add I/O capacity, and boost processing power.
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class Stack { private: int data[CAPACITY]; // an array of integers int top; // top of the stack int size() { return top 1; } } int Stack::pop() { // TODO: finish code } What line of code goes above
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Hypercompetition implies that any architecture must be designed with maximum scalability and _____________ to ensure it can handle the imminent business changes.
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(CO 3) If data aggregation is the goal of collecting the data, _____ are the best choice. Group of answer choices classifications code systems clinical terminologies nomenclatures
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Drake is preparing a presentation to save on a CD. What additional installation file is recommended for end users to run the presentation
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You run a large network in which it is important to keep a duplicate of the central devices in case the primary one fails. What category of network topology does this network use
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Multiple Choice A compiler compiled a program into 25000 instructions. It is run on a processor with a clock frequency of 1GHz. If it takes 3 clocks per instruction on an average, how long will it take for this program to run in seconds
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