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Software Engineer IV was asked...12 April 2012

Two people are each stuck on their own island, connected by a ferryman with a lockable box. Each person has their own lock and key, but can't send the key along with the box. One person wants to send the other a diamond, but it must be placed into the box and locked or it will be stolen by the ferryman. How do you send the diamond without the ferryman stealing it?

10 Answers

1) person A sends key only in a unlocked box to person B. 2) person B sends key only in a unlocked box to person A. 3) 3rd trip person A puts diamonds in the box snaps the lock their holding closed. (At this point owner of the lock can't open the lock. Ensure all contents are in the box before engaging lock.) 4) once the lock box arrives to person B, they can use the key provided on the trip before to open and stare at the contents, And realizes he can pay the ferryman to give him/her ride off the island. Then place a thank you note in the box and close with lock initially held by person B and which now person A has the key. Option B for #4 step) send a thank you note and lock with which the diamonds were so cleverly send to you sealed with. ;) *** Now follow up question would be, how to ensure the ferryman didn't copy the keys during the first transfer of keys? Answer) well, I guess you could have exchanged open locks and not the keys between the two people, and if he could copy a lock on a boat - the ferryman should be looking into more rewarding currier. But why do they care about diamonds when their stuck on an island, not stranded just stuck - pay the ferryman. There is always a man in the middle, know what to trust and what not to. Focusing on security when you may have bigger problems is useless. Less

Step 1: The person with the diamond, puts it in the box, locks it with his lock (Let's say Lock1). The ferryman takes it across. Step 2: Person 2 locks the box again with his lock (Lock2) Sends it back with the ferryman. Step 3 : Person 1 unlocks Lock1. Sends it back. Step 4 : Person 2 unlocks Lock 2 and retrieves the diamond. Less

The upvoted answer has a flaw. The rules state you cannot send your key in the box. Here's how I'd solve it. 1) Person A sends a note in the box unlocked saying send me your lock open. If writing materials are not available, they can send a verbal message with the ferryman. 2) Person B places their lock inside the unlocked box and sends it back 3) Person A places the diamond in the box and locks it with Person B's lock 4) Person B receives the locked box, opens it with their key. Less

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Juniper Networks

Given a binary tree, how would you write program for getting mirror image of tree in O(n) time? Is it possible ? Assume you have no constraints on space.

4 Answers

//call mirror( root, img_root) //img_node is passed by reference mirror (node, img_node ): if (node == NULL) return img_node.left = node.right img_node.right = mode.left mirror (node.right, img_node.left) mirror (node.left, img_node.right) Less

Node mirror(Node node) { if (node == null) return node; /* do the subtrees */ Node left = mirror(node.left); Node right = mirror(node.right); /* swap the left and right pointers */ node.left = right; node.right = left; return node; } Less

Node mirror(Node node) { if (node == null) return node; Node left = node.left; Node right = node.right; node.left = mirror(right); node.right = mirror(left); return node; } Less

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Saudi Aramco

How likely you will be accepted?

3 Answers

About your details of rejection. What is WASSATA?? R u saying someone Desi with a purchee from current employee replaced you after ALL that?? You gotta be shiiitting me! If true, sorry to see that. :( Less




Why do you think we should pay you a market rate salary?

3 Answers

So that I can afford to eat, pay rent and not be miserable and paranoid like you are. Less

The previous response does not remotely answer the question. How does asking a job candidate why they should be paid a fair market salary: demonstrate an employer's commitment to the employee, ensure they hire qualified candidates, and ensure an employee's success in the position? If an employer, Cognosante, expects to hire people at below market salaries, they: are demonstrating that they are not committed to employees, they will not be able to attract and hire qualified candidates, and the candidates they do hire will continue to look for a position that pays a salary commensurate with their qualifications. I worked for a company who underpaid employees, did not keep salaries current with the marketplace and would not invest in employee training to keep their skills current. Turnover was sky high and very detrimental to the business. High-quality people left, marginal and problem employees stayed and morale was very low. It made for a miserable place to work. A prospective employer that is committed to employees will compensate them well, invest in training and skills development, ensure that compensation is current with the market, and proactively manage retention. Less

It demonstrates the Company's commitment to the employee and it streamlines the hiring process by helping to ensure a qualified candidate. For that same reason, it also helps reduce the risk that the candidate will not succeed in the position. Less

Saudi Aramco

Why do you want to join Aramco ?

2 Answers

my skills is suitable to your company

What do you know about saudi aramco ?

Cisco Systems

A C coding test without using any library functions to do some string manipulation.

2 Answers

Generally correct; but not perfect.

There's a lot of elements to typically cover in these questions, clarifications, scoping, making sure you're answering the actual question the interviewer is looking for you to answer, etc. Could be worth doing a mock interview with one of the Prepfully Cisco Software Engineer IV experts... they've worked in the role so they clearly know how to get through the interview. Less

Thomas J. Henry Law, PLLC

What would be your process in working up a typical case through trial?

2 Answers

I discussed my standard practice - required disclosures, my typical discovery approach (he asked a few TRCP questions here), witness interviews and preparation (he wanted to talk more about depositions and my strategy with these) - I basically walked him through my case practice from start to finish. Less

Starting from pre-litigation touching base with the client. Getting photos of injuries/ accidents from them. Getting them scheduled for their treatments. Trying to settle for policy limits pretrial or before trial. Deposing witnesses wherever required. Getting ready for trial side by side seeking best compensation for the date of loss. Less


When would you use linear regression instead of logistic regression

2 Answers

You answered incorrectly. Linear regression is used to model a dependent variable that is normally distributed (a continuous measure). Binary Logistic regression is used to model a dependent (binary choice) variable. Both are used for predictive analysis. Less

This one is pretty textbook - linear regression talks about a relationship over a range while logistic regression is used for predictive analytics. Less


Describe any difficulty in working with others of different cultural or diverse backgrounds?

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